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Chemische Kinetik, Reaktionskinetik - Aktuelle Forschungsartikel


 
Aktuelle Fachartikel Kinetik chemischer Reaktionen (Reaktionskinetik), sortiert nach Erscheinungsdatum.

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Auf dieser Seite beruecksichtige naturwissenschaftliche Journale:


International Journal of Chemical Kinetics - published by Wiley-Interscience -
... publishes original research in gas phase, condensed phase, and polymer reaction kinetics, as well as biochemical and surface kinetics.

Reaction Kinetics and Catalysis Letters - published by Springer -
... is a medium for the rapid publication of original contributions in such fields as kinetics of homogeneous reactions in gas, liquid and solid phase; homogeneous and heterogeneous catalysis; adsorption in heterogeneous catalysis; transport processes related to reaction kinetics and catalysis; preparation and study of catalysts; reactors and apparatus.



Aktuelle wissenschaftliche Fachartikel der genannten Journale:


Equilibrium and kinetic investigation of the interaction of model palladium(II) complex with biorelevant ligands

Quelle: International Journal of Chemical Kinetics | 1 Oct 2010 | 7:00 am CEST

Kinetics of the gas-phase reactions of CHXCFX (X = H, F) with OH (253–328 K) and NO3 (298 K) radicals and O3 (236–308 K)

Quelle: International Journal of Chemical Kinetics | 1 Oct 2010 | 7:00 am CEST

Regression diagnostics applied in kinetic data processing: Outlier recognition and robust weighting procedures

Quelle: International Journal of Chemical Kinetics | 1 Oct 2010 | 7:00 am CEST

Kinetics and modeling of (R,S)-1-phenylethanol acylation over lipase

Quelle: International Journal of Chemical Kinetics | 1 Oct 2010 | 7:00 am CEST

Identification of the effective distribution function for determination of the distributed activation energy models using Bayesian statistics: Application of isothermal thermogravimetric data

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Erratum: “Kinetics of the gas-phase reactions of Cl atom with selected C2–C5 unsaturated hydrocarbons at 283 < T < 323 K,” Int J Chem Kinet 2000, 32, 478

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Kinetics of the disproportionation reaction of HIO2 in acidic aqueous solutions

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Effect of self-assemblies of various surfactants in their single and mixed states on the BZ oscillatory reaction

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Rate constants for the gas-phase reactions of nitrate radicals with geraniol, citronellol, and dihydromyrcenol

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Temperature-dependent rate coefficients and mechanism for the gas-phase reaction of chlorine atoms with acetone

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Abiotic CC bond formation under environmental conditions: Kinetics of the aldol condensation of acetaldehyde in water catalyzed by carbonate ions (CO32−)

Quelle: International Journal of Chemical Kinetics | 1 Jan 2010 | 6:00 am CET

Synthesis of propylene glycol methyl ether over amine modified porous silica

Abstract  Amine functionalized silica catalysts (3-aminopropyltrimethoxysilane (APTMS)) NH2/SiO2, (Diazabicycloundecene/SiO2) DBU/SiO2 and (1,5,7-triazabicyclo[4,4,0]dec-5-ene/SiO2) TBD/SiO2, which were characterized by 29Si NMR, element analysis and indicator dye adsorption, were prepared by ultrasonic technique under mild conditions. Such hybrid solid bases showed high catalytic activity and good reusability towards for the synthesis of propylene glycol methyl ether.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0086-1
  • Authors
    • Xuehong Zhang, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Wenguang Cui, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Weirong Han, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Yunxiao Zhang, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Shubin Liu, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Wei Mu, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Yongfang Chang, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China
    • Ruisheng Hu, Shijiazhuang University Chemistry Department 050031 Shijiazhuang China

Quelle: Reaction Kinetics and Catalysis Letters | 6 Nov 2009 | 8:34 pm CET

Hydrogen storage and delivery: immobilization of a highly active homogeneous catalyst for the decomposition of formic acid to hydrogen and carbon dioxide

Abstract  The homogeneous catalytic system, based on water-soluble ruthenium(II)–TPPTS catalyst (TPPTS = meta-trisulfonated triphenylphosphine), selectively decomposes HCOOH into H2 and CO2 in aqueous solution. Although this reaction results in only two gas products, heterogeneous catalysts could be advantageous for recycling, especially for dilute formic acid solutions, or for mobile, portable applications. Several approaches have been used to immobilize/solidify the homogeneous ruthenium–TPPTS catalyst based on ion exchange, coordination and physical absorption. The activity of the various heterogeneous catalysts for the decomposition of formic acid has been determined. These heterogenized catalysts offer the advantage of easy catalyst separation/recycling in dilute formic acid, or for mobile, portable applications.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0096-z
  • Authors
    • Weijia Gan, École Polytechnique Fédérale de Lausanne (EPFL) Institut des Sciences et Ingénierie Chimiques 1015 Lausanne Switzerland
    • Paul J. Dyson, École Polytechnique Fédérale de Lausanne (EPFL) Institut des Sciences et Ingénierie Chimiques 1015 Lausanne Switzerland
    • Gábor Laurenczy, École Polytechnique Fédérale de Lausanne (EPFL) Institut des Sciences et Ingénierie Chimiques 1015 Lausanne Switzerland

Quelle: Reaction Kinetics and Catalysis Letters | 6 Nov 2009 | 8:34 pm CET

Inactivity of iridium–triphenylphosphine complexes for catalytic imine hydrogenation: formation of neutral, dihydrido-ortho-metallated species

Abstract  Reactions of cis,trans,cis-[Ir(H)2(PPh3)2(MeOH)2]PF6 in MeOH with the imines Ph(R′)C=NR under 1 atm H2 precipitate the neutral, Ir(III)-dihydrido complexes [Ir(H)2{RN=C(R′)(o-C 6H4)}(PPh3)2], where R = alkyl or benzyl, and R′ = Ph, H, or Me; the dihydrides are well characterized through elemental analysis, NMR and IR data and, in one case, with the imine Ph2C=NCH2Ph, an X-ray structure. These products are formed via intermediate ortho-metallated species, exemplified by [Ir(H){PhCH2N=CPh(o-C 6H4)}(PPh3)2(MeOH)]PF6 in the case of the Ph2C=NCH2Ph reaction; the intermediate then reacts with H2 (via net heterolytic cleavage: H2 → H + H+) to give the neutral dihydride and HPF6 as co-product. The ‘unique’ imine PhCH=NPh, under the same conditions, does not form a dihydride and instead is readily catalytically hydrogenated to PhCH2N(H)Ph; remarkably, we have shown previously that this imine is ‘unique’ within the corresponding Rh system in that no catalytic hydrogenation occurs because the amine product ‘poisons’ the Rh centre by coordination through the N-phenyl ring.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0095-0
  • Authors
    • Paolo Marcazzan, University of British Columbia Department of Chemistry Vancouver BC V6T 1Z1 Canada
    • Brian R. James, University of British Columbia Department of Chemistry Vancouver BC V6T 1Z1 Canada

Quelle: Reaction Kinetics and Catalysis Letters | 6 Nov 2009 | 8:34 pm CET

Photocatalytic efficiency of nanocrystalline zeolite TS-1 for the degradation of methyl orange

Abstract  The photocatalytic properties of nanocrystalline TS-1 were confirmed via the degradation of an aqueous solution of the model compound methyl orange (MO). The light intensity and quantum yield were measured by ferrioxalate actinometry and the values are 1.7 × 10−5 einstein l−1 s−1 and 0.71, respectively. The experimental parameters such as catalyst loading, pH and initial concentration of MO were optimized at 1.5 g/L, 10 and 300 μM, in order. The results showed that the dye molecules are completely degraded to CO2, H2O and simple inorganic ions.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0087-0
  • Authors
    • Hsiu-Ling Hsu, Lunghwa University of Science and Technology Department of Chemical and Materials Engineering 300, Wan-shou Rd., Sec. 1 Kueishan Taoyuan Taiwan
    • Rosilda Selvin, Lunghwa University of Science and Technology Department of Chemical and Materials Engineering 300, Wan-shou Rd., Sec. 1 Kueishan Taoyuan Taiwan
    • L. Selva Roselin, National Central University Department of Chemical and Materials Engineering Jhong-Li 320 Taiwan
    • Prajitha Kumari, Lunghwa University of Science and Technology Department of Chemical and Materials Engineering 300, Wan-shou Rd., Sec. 1 Kueishan Taoyuan Taiwan
    • Jia-Wei Cao, Lunghwa University of Science and Technology Department of Chemical and Materials Engineering 300, Wan-shou Rd., Sec. 1 Kueishan Taoyuan Taiwan

Quelle: Reaction Kinetics and Catalysis Letters | 5 Nov 2009 | 7:41 pm CET

Photocatalytic activity of TiO2 prepared by microwave/sol–gel method

Abstract  This study addresses the photodegradation efficiency of bisphenol A (4,4′-isopropylidenephenol, BPA) and the generation of hydroxyl radicals using the UV/TiO2 system. Photocatalysts were formed by the microwave/sol–gel method and TiO2 was prepared with anatase and rutile phases with a high surface area. The hydroxyl radicals generated by the preparation of TiO2 by a microwave/sol–gel process, and its photoactivity, exceeded those of TiO2 prepared using a sol–gel process.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0083-4
  • Authors
    • Han-Yu Lin, National Yunlin University of Science and Technology Graduate School of Engineering Science and Technology Douliou Yunlin Taiwan
    • Chao-Yin Kuo, National Yunlin University of Science and Technology Department of Safety Health and Environmental Engineering 123 University Rd., Sec. 3 Douliou 640 Yunlin Taiwan

Quelle: Reaction Kinetics and Catalysis Letters | 5 Nov 2009 | 7:41 pm CET

Photocatalytic action of ZnO thin films prepared by the sol–gel method

Abstract  Nanostructured ZnO thin films were deposited on glass by the dip-coating sol–gel method. The films exhibited pronounced activity to destroy malachite green in water both under UV-light illumination and in the dark.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0081-6
  • Authors
    • Nina V. Kaneva, University of Sofia Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry 1164 Sofia Bulgaria
    • Georgi G. Yordanov, University of Sofia Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry 1164 Sofia Bulgaria
    • Ceco D. Dushkin, University of Sofia Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry 1164 Sofia Bulgaria

Quelle: Reaction Kinetics and Catalysis Letters | 5 Nov 2009 | 7:41 pm CET

Kinetics of the thermal isomerization of cis-methylcyclopropane carboxylic acid

Abstract  The gas-phase thermal decomposition of cis-2-methylcyclopropane carboxylic acid was investigated in the temperature range 692–753 K and pressure between 10 and 70 Torr. Arrhenius parameters were determined for homogeneous, unimolecular formation of the isomeric products and for the overall loss-rate of the reactant. The determined values are in accordance with the Arrhenius parameters that were reported previously for the thermal unimolecular reactions of cyclopropane and other substituted cyclopropanes. The formation of isomeric products and the observed Arrhenius parameters are consistent with a biradical mechanism. The effect of surface on the reaction was studied at 732 K using the packed reaction vessel. It was observed that the rate of production of all isomeric products and the total loss of cis-2-methylcyclopropane carboxylic acid were not affected by increasing surface to volume ratio.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0091-4
  • Authors
    • Jan Nisar, University of Peshawar Gas-Phase Kinetics Research Laboratory, National Center of Excellence in Physical Chemistry Peshawar 25120 Pakistan
    • Mukhtiar Ali, University of Peshawar Gas-Phase Kinetics Research Laboratory, National Center of Excellence in Physical Chemistry Peshawar 25120 Pakistan
    • Iftikhar Ahmad Awan, University of Peshawar Gas-Phase Kinetics Research Laboratory, National Center of Excellence in Physical Chemistry Peshawar 25120 Pakistan
    • Amir Badshah, Quaid-i-Azam University Department of Chemistry Islamabad Pakistan
    • Sadullah Mir, Quaid-i-Azam University Department of Chemistry Islamabad Pakistan
    • Rafaqat Ali Khan, Quaid-i-Azam University Department of Chemistry Islamabad Pakistan

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

Effects of the preparation method and calcination temperature on Cu–Cr–Mg–Al catalysts for the dehydrogenation of cyclohexanol

Abstract  The activities of the Cu–Cr–Mg–Al catalysts in the dehydrogenation of cyclohexanol to cyclohexanone were correlated with particle sizes and the reducibility of the copper species based on XRD and TPR characterizations. Cu0 was proven to be the active center of the catalysts calcined at low temperatures and some solid solution (MgCu2O3) and spinel (CuAl2O4 or MgAl2O4) were produced when the calcination temperature reached 1,000 °C. The Cu–Cr–Mg–Al catalyst prepared by the co-precipitation method and calcined at 400 °C showed the best activity, with a conversion of 79.7% and a selectivity of 98.6% at 300 °C.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0082-5
  • Authors
    • Guoyi Bai, Hebei University College of Chemistry and Environmental Science 071002 Baoding Hebei People’s Republic of China
    • Xinxin Fan, Hebei University College of Chemistry and Environmental Science 071002 Baoding Hebei People’s Republic of China
    • Hailong Wang, Hebei University College of Chemistry and Environmental Science 071002 Baoding Hebei People’s Republic of China
    • Fei He, Tianjin University School of Chemical Engineering and Technology 300072 Tianjin People’s Republic of China
    • Huisen Ning, Hebei University College of Chemistry and Environmental Science 071002 Baoding Hebei People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

Microwave assisted heterogeneous catalysis: effects of varying oxygen concentrations on the oxidative coupling of methane

Abstract  The oxidative coupling of methane was investigated over alumina supported La2O3/CeO2 catalysts under microwave dielectric heating conditions at different oxygen concentrations. It was observed that, at a given temperature using microwave heating, selectivities for both ethane and ethylene were notably higher when oxygen was absent than that in oxygen/methane mixtures. The differences were attributed to the localised heating of microwave radiation resulting in temperature inhomogeneity in the catalyst bed. A simplified model was used to estimate the temperature inhomogeneity; the temperature at the centre of the catalyst bed was 85 °C greater than that at the periphery when the catalyst was heated by microwaves in a gas mixture with an oxygen concentration of 12.5% (v/v), and the temperature difference was estimated to be 168 °C in the absence of oxygen.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0089-y
  • Authors
    • Binghua Ni, Xi’an Shiyou University College of Chemistry and Chemical Engineering Xi’an 710065 China
    • Colleen Lee, Imperial College of Science, Technology and Medicine Department of Chemistry South Kensington London SW7 2AY UK
    • Run-Cang Sun, Beijing Forestry University College of Material Science and Engineering Beijing 100083 China
    • Xunli Zhang, Imperial College of Science, Technology and Medicine Department of Chemistry South Kensington London SW7 2AY UK

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

Preparation of 3,6-dibenzoylacenapthene in the presence of Lewis acidic ionic liquids

Abstract  The reactivity of Lewis acidic ionic liquids for the acylation of acenaphthene to 3,6-dibenzoylacenaphthene was investigated. Ionic liquids of different alkyl chain length and metal chloride were synthesized and tested for the reaction to discuss the effects of Lewis acidity of the ionic liquid on the alkylation. Pure 3,6-dibenzoylacenaphthene was obtained and the structure of 3,6-dibenzoylacenaphthene was identified by GC/MS, FT-IR and 1H NMR spectra. [Emim]C1/A1C13 ionic liquid was found to be the most active catalyst in the acylation. The yield of 3,6-dibenzoylacenaphthene was up to 89.6% and the selectivity towards 3,6-dibenzoylacenaphthene was up to 92.2%. The experiment shows that [Emim]Cl/AlCl3 can be used as both catalyst and solvent, it is reusable and environmentally friendly for the preparation of 3,6-dibenzoylacenaphthene.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0088-z
  • Authors
    • Min Chen, Jiangsu University School of Chemistry and Chemical Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China
    • Lijing Huang, Jiangsu University School of Chemistry and Chemical Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China
    • Ying Luo, Jiangsu University School of Chemistry and Chemical Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China
    • Minqiang He, Jiangsu University School of Chemistry and Chemical Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China
    • Jimin Xie, Jiangsu University School of Chemistry and Chemical Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China
    • Xinhua Yuan, Jiangsu University School of Material Science and Engineering 301 Xuefu Road Zhenjiang 212013 Jiangsu People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

The inhibitory effect of dissolved carbaryl in dioxane on physically adsorbed acetylcholinesterase

Abstract  Acetylcholinesterase was immobilized by means of physical adsorption. The aim of this work is to describe the kinetic characterization of the immobilized acetylcholinesterase. Here we report the effects of immobilization, carbaryl and its solvent dioxane on the kinetic properties of acetylcholinesterase. The immobilized product has significant storage stability. Dioxane could decrease the acetylcholinesterase activity and increase the inhibitory effect of carbaryl. Immobilization could change acetylcholinesterase activity cooperatively. The inhibitory mechanism is hyperbolic noncompetitive. Carbaryl and dioxane could eliminate the substrate inhibition by a competitive mechanism and by changing the native conformation of acetylcholinesterase.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0094-1
  • Authors
    • Amir Norouzy, Babol University of Medical Sciences Department of Biochemistry and Biophysics Babol Iran
    • Durdi Qujeq, Babol University of Medical Sciences Department of Biochemistry and Biophysics Babol Iran
    • Mehran Habibi-Rezaei, University of Tehran School of Biology, University College of Science Tehran Iran

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

Heterogeneous Heck reaction catalysed by silica gel-supported 1,2-diaminocyclohexane–Pd complex

Abstract  A 1,2-diaminocyclohexane–Pd complex was immobilized onto the surface of silica gel and investigated as a catalyst for Heck coupling reactions. The immobilized catalyst exhibited high catalytic activity in the coupling of activated and nonactivated aryl substrates with various acrylates. Moreover, the catalyst was air-stable that could be recycled and reused without significant loss of catalytic activity.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0085-2
  • Authors
    • Md. Nazmul Alam, Shahjalal University of Science and Technology Department of Chemistry, School of Physical Sciences Sylhet 3114 Bangladesh
    • Shaheen M. Sarkar, Inha University Department of Chemical Engineering Incheon 402-751 South Korea
    • Md. Rezwan Miah, Shahjalal University of Science and Technology Department of Chemistry, School of Physical Sciences Sylhet 3114 Bangladesh

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:02 pm CET

Syngas production from methane reforming with O2 and CO2 over Ni–La2O3/SiO2 catalysts using EDTA salt precursors

Abstract  Ni–La2O3/SiO2 catalysts (NLS) were prepared by the incipient-wetness impregnation method using EDTA salt precursors. XRD measurements revealed that the promoter of La2O3 is highly dispersed on the NLS. The TPR profiles indicated a strong interaction between NiO and La2O3 to form a La–Ni complex oxide like species over the NLS, which may be the origin of its high catalytic performance.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0090-5
  • Authors
    • Wanjin Yu, Zhejiang University Institute of Catalysis, Key Lab of Applied Chemistry of Zhejiang Province Hangzhou 310028 China
    • Yuzhan Xu, Zhejiang Education Institute Department of Chemistry Hangzhou 310012 China
    • Liuye Mo, Zhejiang University Institute of Catalysis, Key Lab of Applied Chemistry of Zhejiang Province Hangzhou 310028 China
    • Hui Lou, Zhejiang University Institute of Catalysis, Key Lab of Applied Chemistry of Zhejiang Province Hangzhou 310028 China
    • Xiaoming Zheng, Zhejiang University Institute of Catalysis, Key Lab of Applied Chemistry of Zhejiang Province Hangzhou 310028 China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:01 pm CET

Kinetic investigation of propane oxidation on diluted Mo1–V0.3–Te0.23–Nb0.125–Ox mixed-oxide catalysts

Abstract  Reaction kinetics and proposed mechanism for the oxidation of propane over diluted Mo1–V0.3–Te0.23–Nb0.125–O x are described. The kinetic study allowed determination of the orders of propane disappearance, propene formation, CO x formation, and acids formation. The results show that selective oxidation of propane to propylene over this catalyst follows the Langmuir-Hinshelwood mechanism. Deep oxidation of propane to carbon dioxide is first order with respect to hydrocarbon, and partial order (0.21) with respect to oxygen. The selective oxidation of propane to acrylic acid is half order with respect to hydrocarbon and partial order (0.11) with respect to oxygen, while water does not participate directly in propane transformation. The result also shows that the overall reaction consists of three parallel process channels. One main sequence of consecutive reactions leads to the desired product.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0092-3
  • Authors
    • Restu Kartiko Widi, University of Surabaya Department of Chemical Engineering TG Building 6th floor, Raya Kalirungkut Tenggilis Surabaya 60293 Indonesia
    • Sharifah Bee Abd Hamid, Institute of Postgraduate Studies, University of Malaya Combinatorial Technology and Catalysis Research Centre, COMBICAT 3rd floor, Block A 50603 Kuala Lumpur Malaysia
    • Robert Schlogl, Fritz-Haber-Institut Anorganische Chemie Faradayweg 4-6 14195 Berlin Germany

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:01 pm CET

Synthesis and characterization of CeO2 by the hydrothermal method assisted by carboxymethylcellulose sodium

Abstract  Nano-CeO2 with different crystallite sizes, surface areas and morphologies were synthesized with a hydrothermal method assisted by carboxymethylcellulose sodium (CMC) at 110 °C. It was found that the reducible properties of CeO2 samples showed a significant influence on the active carbon (AC) combustion.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0093-2
  • Authors
    • Jing Liu, Zhejiang University, Key Lab of Applied Chemistry of Zhejiang Province Institute of Catalysis 310028 Hangzhou People’s Republic of China
    • Lina Wang, Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education 310018 Hangzhou People’s Republic of China
    • Hongmiao Wu, Zhejiang University, Key Lab of Applied Chemistry of Zhejiang Province Institute of Catalysis 310028 Hangzhou People’s Republic of China
    • Liuye Mo, Zhejiang University, Key Lab of Applied Chemistry of Zhejiang Province Institute of Catalysis 310028 Hangzhou People’s Republic of China
    • Hui Lou, Zhejiang University, Key Lab of Applied Chemistry of Zhejiang Province Institute of Catalysis 310028 Hangzhou People’s Republic of China
    • Xiaoming Zheng, Zhejiang University, Key Lab of Applied Chemistry of Zhejiang Province Institute of Catalysis 310028 Hangzhou People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:01 pm CET

Hydrogen production on iron–magnesium oxide in the high-temperature water-gas shift reaction

Abstract  Fe–Cr–O and Fe–Mg–O catalysts were used for hydrogen production via the water-gas shift reaction. Fe–Cr–O catalysts were synthesized by different methods such as co-precipitation, impregnation and substitution technique. Catalysts were characterized by XRD, TG, BET and TPR. Addition of Mg improved the catalytic activity of Fe–O by favouring the development of small and well dispersed Fe particles (MgFe2O4). As a consequence, MgO prevented iron phase sintering in the presence of a large amount of water in the WGS reaction.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0084-3
  • Authors
    • Amel Boudjemaa, Laboratoires C. G. N. et L. S. V. E. R., Faculté de Chimie, USTHB, BP32, El-Alia, Bab-Ezzouar, Algiers, Algeria
    • Aline Auroux, Institut de Recherches sur la Catalyse et l’environnement de Lyon, UMR 5256, CNRS-UCB Lyon1, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
    • Souhila Boumaza, Laboratoires C. G. N. et L. S. V. E. R., Faculté de Chimie, USTHB, BP32, El-Alia, Bab-Ezzouar, Algiers, Algeria
    • Mohamed Trari, Laboratoires C. G. N. et L. S. V. E. R., Faculté de Chimie, USTHB, BP32, El-Alia, Bab-Ezzouar, Algiers, Algeria
    • Ouiza Cherifi, Laboratoires C. G. N. et L. S. V. E. R., Faculté de Chimie, USTHB, BP32, El-Alia, Bab-Ezzouar, Algiers, Algeria
    • Rabah Bouarab, Laboratoires C. G. N. et L. S. V. E. R., Faculté de Chimie, USTHB, BP32, El-Alia, Bab-Ezzouar, Algiers, Algeria

Quelle: Reaction Kinetics and Catalysis Letters | 3 Nov 2009 | 12:01 pm CET

Leaving group effect in the sulfonyl transfer reactions of aryl benzenesulfonates with Grignard reagents

Abstract  The C–S coupling reactions of aryl benzenesulfonates with phenylmagnesium bromide in THF:toluene (7:10) at 90 °C have been studied. A Hammett-type kinetic study of the leaving group effect of aryloxy groups provides a conclusive support for a two step addition-elimination mechanism in which C–S bond formation is rate determining step.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0053-x
  • Authors
    • Fatma Eroğlu, Science Faculty, Ankara University, 06100 Besevler, Ankara, Turkey
    • Didem Kâhya, Science Faculty, Ankara University, 06100 Besevler, Ankara, Turkey
    • Ender Erdik, Science Faculty, Ankara University, 06100 Besevler, Ankara, Turkey

Quelle: Reaction Kinetics and Catalysis Letters | 24 Sep 2009 | 6:48 pm CEST

Partial oxidation of methane into syngas on Pt-supported mixed oxides: effect of surface/lattice oxygen mobility in complex oxides on the kinetic features of the reaction and performance stability

Abstract  Partial oxidation of methane (POM) into syngas at short contact times on two catalysts containing Pt/PrCeZrO and Pt/LaCeZrO deposited on single channels of a corundum monolithic substrate was investigated. The effects of the catalyst composition, pretreatment and process parameters on activity and selectivity of the syngas formation were studied. The oxygen mobility in complex oxides was shown to determine both their stability to coking and realization of a direct selective oxidation route of the syngas generation.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0063-8
  • Authors
    • Natalya N. Sazonova, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Vladislav A. Sadykov, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Aleksey S. Bobin, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Svetlana A. Pokrovskaya, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Elena L. Gubanova, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Claude Mirodatos, CNRS Institut de Recherches sur la Catalyse 2 Avenue Albert Einstein Villeurbanne Cédex France

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

Cobalt Schiff base complexes with symmetric or asymmetric ligands: syntheses and application for the redox carbonylation of aniline to diphenyl urea

Abstract  Two asymmetric salophen ligands (salophen(OH)(H) and salophen(NO2)(H)) were successfully synthesized via a step-wise approach. The catalytic results using redox carbonylation of aniline as model reaction showed that cobalt(II)–salophen(OH)(H) complexes is the most reactive catalyst.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0073-6
  • Authors
    • Li-Juan Chen, Huazhong University of Science and Technology Department of Chemistry 430074 Wuhan Peoples Republic of China
    • Fu-Ming Mei, Huazhong University of Science and Technology Department of Chemistry 430074 Wuhan Peoples Republic of China
    • Guang-Xing Li, Huazhong University of Science and Technology Department of Chemistry 430074 Wuhan Peoples Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

Catalytic oxidation of ethylene to acetic acid on Pd–HPA/SiO2 catalysts with different heteropoly acids

Abstract  The effect of different heteropoly acids (HPA) on the catalytic properties of Pd–HPA/SiO2 in the selective oxidation of ethylene to acetic acid was investigated in this work. The results demonstrated that a good balance of Brönsted acid sites and Pd2+ ions stabilized by Brönsted acid sites was an indispensable factor in producing acetic acid.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0074-5
  • Authors
    • Shuliang Xu, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics P.O. Box 110 116023 Dalian China
    • Lixia Wang, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics P.O. Box 110 116023 Dalian China
    • Wenling Chu, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics P.O. Box 110 116023 Dalian China
    • Weishen Yang, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics P.O. Box 110 116023 Dalian China

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

In situ FTIR study of transformation of 3-cyanopyridine on V–Ti–O catalyst

Abstract  Surface complexes of cyanopyridine on a V–Ti–O catalyst were studied by in situ FTIR spectroscopy. In the temperature range of 130–290 °C, two types of adsorbed cyanopyridine bound to different sites (Lewis acid sites or Brönsted acid sites) were found to transform into surface nicotinamide. At 220–290 °C, surface heterocyclic complexes decompose to form carboxylates and ammonium ions.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0065-6
  • Authors
    • Yuriy A. Chesalov, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Galina Ya. Popova, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Galina B. Chernobay, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Tamara V. Andrushkevich, Boreskov Institute of Catalysis 630090 Novosibirsk Russia

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

Dry reforming of methane over fluorite-like mixed oxides promoted by Pt

Abstract  Dry reforming of methane into syngas was studied over complex Pt-promoted fluorite-like oxides (PrCeZrO, GdCeZrO and LaCeZrO) supported on a corundum substrate. Activity and syngas selectivity of these catalysts were found to depend strongly on their composition, pretreatment and reaction conditions. At low temperatures and short contact times, the H2/CO ratio in the syngas is below 1 due to a fast reverse water–gas shift reaction. The catalyst performance was found to correlate with the bulk oxygen mobility in complex fluorite-like oxides, which prevents the surface coking.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0064-7
  • Authors
    • Natalya N. Sazonova, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Vladislav A. Sadykov, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Aleksey S. Bobin, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Svetlana A. Pokrovskaya, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Elena L. Gubanova, Boreskov Institute of Catalysis SB RAS 630090 Novosibirsk Russia
    • Claude Mirodatos, CNRS Institut de Recherches sur la Catalyse 2 Avenue Albert Einstein Villeurbanne Cédex France

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

Partial oxidation of methane into synthesis gas over a Pt-supported complex fluorite-like oxide: one-channel studies in realistic feeds

Abstract  Partial oxidation of methane (POM) into synthesis gas over a single channel of monolithic catalyst 1.4 wt% Pt/Gd0.3Ce0.35Zr0.35Ox/α-Al2O3 was investigated. The effect of the catalyst pretreatment and of the process parameters (temperature, contact time, feed composition) on the catalytic activity and synthesis gas (syngas) selectivity was studied at conditions close to realistic ones with a minimum impact of the mass and heat transfer phenomena. Experimental data are in favor of the direct route of the syngas formation via the methane pyrolysis—selective oxidation sequence.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0062-9
  • Authors
    • Natalya N. Sazonova, Boreskov Institute of Catalysis SB RAS Novosibirsk 630090 Russia
    • Vladislav A. Sadykov, Boreskov Institute of Catalysis SB RAS Novosibirsk 630090 Russia
    • Aleksey S. Bobin, Boreskov Institute of Catalysis SB RAS Novosibirsk 630090 Russia
    • Svetlana A. Pokrovskaya, Boreskov Institute of Catalysis SB RAS Novosibirsk 630090 Russia
    • Elena L. Gubanova, Boreskov Institute of Catalysis SB RAS Novosibirsk 630090 Russia
    • Claude Mirodatos, CNRS Institut de Recherches sur la Catalyse 2 Avenue Albert Einstein Villeurbanne Cedex France

Quelle: Reaction Kinetics and Catalysis Letters | 18 Sep 2009 | 1:09 am CEST

Stability of [(N-pyrrolidine)metylene]daunorubicin in aqueous solutions

Abstract  The stability of [(N-pyrrolidine)metylene]daunorubicin (PMD) in aqueous solutions was studied in the pH range 0.42–12.03 at four temperatures. Its degradation was evaluated by using an HPLC method with UV detection (254 nm). The hydrolysis of PMD involved: (a) hydrolysis of protonated molecules of PMD depending on hydrogen ions and (b) spontaneous hydrolysis under the influence of water depending on the substrate charge.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0068-3
  • Authors
    • Anna Jelińska, Poznan University of Medical Sciences Department of Pharmaceutical Chemistry, Faculty of Pharmacy Grunwaldzka 6 60-780 Poznań Poland
    • Justyna Uszak, Biofarm Sp. Z o.o. Wałbrzyska 13 60-198 Poznań Poland
    • Judyta Cielecka-Piontek, Poznan University of Medical Sciences Department of Pharmaceutical Chemistry, Faculty of Pharmacy Grunwaldzka 6 60-780 Poznań Poland
    • Marianna Zając, Poznan University of Medical Sciences Department of Pharmaceutical Chemistry, Faculty of Pharmacy Grunwaldzka 6 60-780 Poznań Poland
    • Anna Lamberti, Poznan University of Medical Sciences Department of Pharmaceutical Chemistry, Faculty of Pharmacy Grunwaldzka 6 60-780 Poznań Poland
    • Irena Oszczapowicz, Institute of Biotechnology and Antibiotics Department of Modified Antibiotics Starościńska 5 02-515 Warsaw Poland
    • Małgorzata Łukawska, Institute of Biotechnology and Antibiotics Department of Modified Antibiotics Starościńska 5 02-515 Warsaw Poland

Quelle: Reaction Kinetics and Catalysis Letters | 16 Sep 2009 | 3:14 pm CEST

Comparison of the substrate dependent performance of Pt-, Au- and Ag-doped TiO2 photocatalysts in H2-production and in decomposition of various organics

Abstract  Pt-, Au- and Ag-deposited Degussa P25 photocatalysts [at 1% (m/m) noble metal loading] were prepared in which the noble metals are most likely to be very finely dispersed on the surface of the TiO2 nanocrystals. Deposition of noble metals increased the photocatalytic efficiency (relative to the bare photocatalyst) in the decomposition of oxalic- and formic acid, while decreased it in phenol containing systems. In H2-production, a very high quantum yield has been found for the Pt–TiO2 photocatalyst in the presence of oxalic and formic acids as sacrificial reagents, which opens the possibility for the economic use of industrial side products (e.g., oxalic- and formic acid) for photocatalytic H2-production.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0052-y
  • Authors
    • Károly Mogyorósi, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary
    • Ákos Kmetykó, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary
    • Nóra Czirbus, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary
    • Gábor Veréb, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary
    • Pál Sipos, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary
    • András Dombi, University of Szeged Department of Inorganic and Analytical Chemistry, Research Group for Environmental Chemistry, ReGECh PO Box 440 6701 Szeged Hungary

Quelle: Reaction Kinetics and Catalysis Letters | 16 Sep 2009 | 3:14 pm CEST

Catalytic oxidation of fatty acids. I. Epoxidation of unsaturated fatty acids

Abstract  Unsaturated fatty acids and their derivatives were oxidized with aqueous hydrogen peroxide in two-phase systems in the presence of homogeneous catalysts Q3{PO4[WO(O2)2]4}, where Q is [Bu4n]3 +, [C5H5N(n-C16H33)]3 + or [Me(n-C8H17)3N]3 +. The reactions occurred under mild conditions (T < 100 °C, atmospheric pressure), without organic solvents, and exhibited high conversion and selectivity.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0069-2
  • Authors
    • Zinaida P. Pai, Boreskov Institute of Catalysis Novosibirsk 630090 Russia
    • Tatiana B. Khlebnikova, Boreskov Institute of Catalysis Novosibirsk 630090 Russia
    • Yulia V. Mattsat, Boreskov Institute of Catalysis Novosibirsk 630090 Russia
    • Valentin N. Parmon, Boreskov Institute of Catalysis Novosibirsk 630090 Russia

Quelle: Reaction Kinetics and Catalysis Letters | 16 Sep 2009 | 3:14 pm CEST

Catalytic oxidation of fatty acids. II. Epoxidation and oxidative cleavage of unsaturated fatty acid esters containing additional functional groups

Abstract  Methyl esters of monounsaturated fatty acids were oxidized with aqueous hydrogen peroxide in biphasic organic-aqueous systems in the presence of catalyst [Me(n-C8H17)3N]3{PO4[WO(O2)2]4}. Epoxidation and oxidative cleavage of the C=C bond were found to proceed with high conversion and selectivity in the absence of organic solvents and under rather mild conditions (T < 100 °C, 1 atm).

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0054-9
  • Authors
    • Tatiana B. Khlebnikova, Boreskov Institute of Catalysis Novosibirsk 630090 Russia
    • Zinaida P. Pai, Boreskov Institute of Catalysis Novosibirsk 630090 Russia
    • Larisa A. Fedoseeva, Institute of Cytology and Genetics Novosibirsk 630090 Russia
    • Yulia V. Mattsat, Boreskov Institute of Catalysis Novosibirsk 630090 Russia

Quelle: Reaction Kinetics and Catalysis Letters | 16 Sep 2009 | 3:14 pm CEST

Promoted aromatization and isomerization performance over ZSM-5 zeolite modified by the combined alkali-steam treatment

Abstract  The combined alkali-steam treatment was employed to prepare the ZSM-5 zeolite possessing the micro-mesopore hierarchical structure and proper acidity simultaneously. The tailored zeolite displayed superior catalytic performance in the aromatization and isomerization of 1-hexene.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0075-4
  • Authors
    • Yuning Li, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics 116023 Dalian People’s Republic of China
    • Shenglin Liu, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics 116023 Dalian People’s Republic of China
    • Sujuan Xie, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics 116023 Dalian People’s Republic of China
    • Longya Xu, Chinese Academy of Sciences State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics 116023 Dalian People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Corrosivity of catalysts based on aqueous solutions of Mo–V–P heteropoly acids

Abstract  Corrosion resistance of metallic titanium, alloys KhN65MV and 06KhN28MDT, and stainless steels 10Kh17N13M2T and 12Kh18N10T towards the action of homogenous oxidation catalysts based on aqueous solutions of Mo–V–P heteropoly acids was studied by an example of the 0.25 M aqueous solution of H12P3Mo18V7O85. It was established that the corrosivity of this solution towards these materials grows in the series: Ti < 06KhN28MDT < 10Kh17N13M2T < 12Kh18N10T << KhN65MV. The highest corrosion resistance of the steels 06KhN28MDT and 10Kh17N13M2T was attributed to the fact that their Ni:Cr atomic ratio is in the range from 0.6 to 1.1.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0066-5
  • Authors
    • Elena G. Zhizhina, Boreskov Institute of Catalysis, Novosibirsk, 630090 Russia
    • Viktor F. Odyakov, Boreskov Institute of Catalysis, Novosibirsk, 630090 Russia

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Phosphomolybdic acid dispersed in Al-pillared clay (PMA/Al-PILC) as heterogeneous catalyst for the benign synthesis of benzoxanthenes under solvent free conditions

Abstract  Phosphomolybdic acid dispersed in the micropores of Al-pillared clay (PMA/Al-PILC) was prepared by the impregnation method and characterized by XRD and sorptomeric studies. The interlayer structure of the Al-pillared clay was found to be retained in the PMA/Al-PILC catalyst which displays high surface area and micropore volume. The PMA/Al-PILC material was used as a heterogeneous and recyclable catalyst for efficient condensation of β-naphthol with arylaldehydes to afford a variety of structurally diverse aryl-14H-dibenzo[a,j]xanthenes in excellent yield and purity in short reaction time under microwave irradiation.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0076-3
  • Authors
    • Mallari A. Naik, Birla Institute of Technology and Science Chemistry Group Pilani 333031 India
    • S. Samantaray, National Institute of Technology Chemistry Department Rourkela 769008 India
    • Braja Gopal Mishra, National Institute of Technology Chemistry Department Rourkela 769008 India
    • Amit Dubey, Birla Institute of Technology and Science Chemistry Group Pilani 333031 India

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Abstract  Titanium dioxide (TiO2) photocatalysts co-doped with iron (Fe) and niobium (Nb) were synthesized using a temperature-controlled sol–gel method. The photocatalysis products were characterized and the photocatalytic activities were evaluated by the degradation of aqueous methyl orange solution. Enhanced photocatalytic activity compared to undoped TiO2 was attributed to the cooperative effects of metal dopants, Fe and Nb.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0061-x
  • Authors
    • Carl Renan Estrellan, Tokyo Institute of Technology Department of International Development Engineering 2-12-1 Ookayama, Meguro-ku Tokyo 152-8552 Japan
    • Chris Salim, Tokyo Institute of Technology Department of International Development Engineering 2-12-1 Ookayama, Meguro-ku Tokyo 152-8552 Japan
    • Hirofumi Hinode, Tokyo Institute of Technology Department of International Development Engineering 2-12-1 Ookayama, Meguro-ku Tokyo 152-8552 Japan

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Comparative study of nucleophilic efficacy of pralidoxime towards phosphorus, sulfur and thiophosphorus based esters

Abstract  The nucleophilic substitution reaction of p-nitrophenyl diphenyl phosphate, p-nitrophenyl p-toluene sulfonate and insecticide fenitrothion with pralidoxime have been studied at 27 °C in the presence of different cationic surfactants. Micellar rate enhancements increase as the cationic head group is made less polar. The order of cleavage of different electrophilic centres by pralidoxime is P = O > S = O > P = S.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0072-7
  • Authors
    • Shuchi Tiwari, Pt. Ravishankar Shukla University School of Studies in Chemistry Raipur CG 492010 India
    • Kallol K. Ghosh, Pt. Ravishankar Shukla University School of Studies in Chemistry Raipur CG 492010 India
    • Jan Marek, Faculty of Military Health Sciences Center of Advanced Studies and Department of Toxicology Trebesska1575 500 01 Hradec Kralove Czech Republic
    • Kamil Kuca, Faculty of Military Health Sciences Center of Advanced Studies and Department of Toxicology Trebesska1575 500 01 Hradec Kralove Czech Republic

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

The effect of mixed surfactants of sodium dodecyl sulfate and Triton X-100 on the base hydrolysis of Malachite green

Abstract  The base hydrolysis of Malachite green (MG+) was studied in aqueous solution of mixed surfactants of sodium dodecyl sulfate (SDS) and Triton X-100 (TX-100) at 25 °C. The results show that the SDS/TX-100 system compositions has relatively significant influence on the rate constant of the base hydrolysis of MG+ when compared with the reaction in the respective single surfactant systems.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0070-9
  • Authors
    • O. Oladega Soriyan, Obafemi Awolowo University Department of Chemistry Ile-Ife Nigeria
    • Olanrewaju Owoyomi, Obafemi Awolowo University Department of Chemistry Ile-Ife Nigeria
    • J. T. Bamgbose, Federal University of Agriculture Department of Chemistry Abeokuta Nigeria

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Peculiarities of dehydroaromatization of CH4–C2H6 and CH4 over Mo/ZSM-5 catalysts

Abstract  The peculiarities of dehydroaromatization (DHA) of a CH4–C2H6 mixture over 1–10% Mo/ZSM-5 catalysts (Si/Al = 17, 30, 45) were studied in comparison with reactions of individual hydrocarbons. For a (90 vol.% CH4 + 10 vol.% Ar) mixture, the methane conversion passes through a maximum and decreases with the time-on-stream, being about 12% after 6 h. Experiments with a mixture (85 vol.% CH4 + 5 vol.% C2H6 + 10 vol.% Ar) demonstrated that the presence of ethane leads to the suppression of the methane conversion practically to zero and to an increase in the benzene formation rate in comparison with the (CH4 + Ar) mixture. Characterization of the spent Mo/ZSM-5 catalysts by DTA and TGA showed that both the condensation degree of the carbonaceous deposits (C/H ratio) and their content are higher in the presence of ethane. For both feed compositions, the maximal benzene formation rate was observed over the catalyst with 2 wt% Mo and Si/Al = 17. It is proposed that the formation of C2 intermediates from methane and their further transformations in DHA compete with the ethane aromatization, presumably on the same Mo active sites.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0080-7
  • Authors
    • Ekaterina V. Matus, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Olga B. Sukhova, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Ilyas Z. Ismagilov, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Lidiya T. Tsikoza, Boreskov Institute of Catalysis 630090 Novosibirsk Russia
    • Zinfer R. Ismagilov, Boreskov Institute of Catalysis 630090 Novosibirsk Russia

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Conversion of n-heptane to LPG and aromatics over Mo2C and W2C catalysts supported on ZSM-5

Abstract  We have investigated the catalytic activity of W2C/HZSM-5 and Mo2C/HZSM-5 for conversion of n-heptane to LPG and aromatic products. The results show that the catalytic activity of the metallic carbides increases markedly in the presence of ZSM-5. For pure carbides, the main cracking products are methane and ethane as a result of the cleavage of the C–C bond at the end of the hydrocarbon chain. In contrast, the zeolitic catalysts produce LPG (propane, i-butane, and n-butane) through the cleavage of C–C bond in the medial bonds. It is observed that the metallic carbides play a key role in producing the aromatics, concerning the formation of olefin species and cyclization of them in the channels of zeolite.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0077-2
  • Authors
    • M. R. Toosi, Shahid Beheshti University Department of Chemistry, Faculty of Science Tehran 1983963113 Iran
    • M. H. Peyrovi, Shahid Beheshti University Department of Chemistry, Faculty of Science Tehran 1983963113 Iran
    • R. Mondgarian, Research Institute of Petroleum Industry (RIPI) Tehran 1485733111 Iran

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Synthesis of MgAPO-5 molecular sieves and their kinetic behavior for n-hexane cracking

Abstract  Five magnesium substituted aluminophosphate molecular sieves (denoted as MgAPO-5 (a–e), AFI topology) with different magnesium contents were synthesized hydrothermally and characterized by XRD, ICP-AES, IR, and NH3-TPD techniques. The characterization data show that the isomorphous substitution of magnesium for aluminum in the pure AFI framework results in MgAPO-5 (a–e) with weak and strong acid sites and that the number of strong acid sites linearly increases with increasing magnesium content (correlation coefficient: 0.9960). n-Hexane catalytic cracking over MgAPO-5 (a–e) was investigated at low conversions (≤5%) in a microflow fixed bed reactor. Under controlled conditions, the reaction was first order in both the n-hexane concentration and the magnesium content. The analysis of the kinetic parameters and the product selectivities suggests that the cracking transformation is effected by strong Mg(II)-related acid sites rather than weak ones and predominantly undergoes the monomolecular protolytic mechanism, which is consistently explained by a proposed kinetic model.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0078-1
  • Authors
    • Lili Feng, Beijing University of Aeronautics and Astronautics School of Chemistry and Environment 37 Xueyuan Road, HaiDian District Beijing 100191 People’s Republic of China
    • Xingyi Qi, Beijing University of Aeronautics and Astronautics School of Chemistry and Environment 37 Xueyuan Road, HaiDian District Beijing 100191 People’s Republic of China
    • Junying Li, Beijing University of Aeronautics and Astronautics School of Chemistry and Environment 37 Xueyuan Road, HaiDian District Beijing 100191 People’s Republic of China
    • Yuelin Zhu, Beijing University of Aeronautics and Astronautics School of Chemistry and Environment 37 Xueyuan Road, HaiDian District Beijing 100191 People’s Republic of China
    • Liqun Zhu, Beijing University of Aeronautics and Astronautics School of Chemistry and Environment 37 Xueyuan Road, HaiDian District Beijing 100191 People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Single step conversion of benzene to phenol using hydrogen peroxide over modified V2O5–Al2O3 systems

Abstract  Alumina supported vanadia catalysts were prepared by the wet impregnation method. The effect of vanadium content was investigated with 1.92–16.93 wt% V2O5 loading over the support. Physical characterization of the catalysts was done by techniques such as energy dispersive X-ray (EDX), X-ray diffraction (XRD), BET surface area measurement, FTIR spectroscopy and temperature programmed reduction (TPR) studies. Characterization techniques have revealed that vanadia is well dispersed over alumina up to 13.91 wt%, after which aggregation into vanadia crystallites was observed. Single step liquid-phase hydroxylation of benzene to phenol by hydrogen peroxide was studied over these catalysts. The phenol selectivity can be attributed to amorphous surface vanadyl units in the catalysts. The supported analogues were modified with oxides of iron and cerium. Ceria incorporation to alumina enhanced the activity towards hydroxylation of benzene.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0079-0
  • Authors
    • Ammanchery Velandy Shijina, University of Calicut Department of Chemistry Kerala India
    • Neeroli Kizhakayil Renuka, University of Calicut Department of Chemistry Kerala India

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Studies on the photocatalytic degradation of 2,3-dichlorophenol using different oxidants in aqueous solutions

Abstract  In the present study, the photocatalytic degradation of 2,3-dichlorophenol(2,3-DCP) has been investigated in a batch reactor under UV light in slurry mode using titania P-25 (surface area 50 m2/g) as a photocatalyst and H2O2/NaOCl as oxidants. The variables studied include catalyst dose, solution pH, oxidant concentration and initial substrate concentration. The rate of degradation was studied in terms of changes in the concentration of the pollutants and reduction in chemical oxygen demand. The degradation rate of (2,3-DCP) was favorable at acidic pH with both oxidants. The optimum value of catalyst dose and oxidant concentration was found to be 0.75 g/L and 10 mM. The disappearance of 2,3-DCP obeyed pseudo-first order kinetics and the rate constant values were found to be 1.06 × 10−3s−1 and 8.7 × 10−4s−1 for TiO+ H2O2 and TiO+ NaOCl respectively.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0058-5
  • Authors
    • S. K. Kansal, University Institute of Chemical Engineering & Technology, Panjab University Chandigarh India
    • G. Kaur, University Institute of Chemical Engineering & Technology, Panjab University Chandigarh India
    • S. Singh, University Institute of Chemical Engineering & Technology, Panjab University Chandigarh India

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Aldol condensation of acetone over Mg–Al mixed oxides catalyst prepared by a citric acid route

Abstract  Mg–Al mixed oxides with different Mg/Al molar ratios were prepared by using a citric acid route and tested as catalysts for the gas phase self-aldol condensation of acetone to isophorone. The sample with Mg/Al ratio of 1.0 exhibits relatively high activity and stability, and its catalytic performance could be further improved by adding alkali promoter.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0055-8
  • Authors
    • Chunxiang Ma, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Gang Liu, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Zhenlu Wang, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Yufei Li, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Jing Zheng, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Wenxiang Zhang, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China
    • Mingjun Jia, Jilin University Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry 130012 Changchun China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Photocatalytic degradation of C.I. Acid Blue 80 in aqueous suspensions of titanium dioxide under sunlight

Abstract  The dye C.I. Acid Blue 80 (AB80) was easily degraded by TiO2-P25 assisted photocatalysis in aqueous dispersion under irradiation of sunlight. The optimal reaction conditions were [TiO2] = 2.0 g/L, pH = 10, [H2O2] = 5 mmol/L. The photocatalytic reaction followed pseudo-first order kinetics. The adsorption of AB80 onto TiO2 was in accord with Langmuir equation.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0059-4
  • Authors
    • Yingying Su, Institute of Oceanology, Chinese Academy of Sciences 266071 Qingdao Shandong China
    • Liping Deng, Institute of Oceanology, Chinese Academy of Sciences 266071 Qingdao Shandong China
    • Ning Zhang, Institute of Oceanology, Chinese Academy of Sciences 266071 Qingdao Shandong China
    • Xinting Wang, Institute of Oceanology, Chinese Academy of Sciences 266071 Qingdao Shandong China
    • Xiaobin Zhu, Institute of Oceanology, Chinese Academy of Sciences 266071 Qingdao Shandong China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Hydrolyzed octadecyltrichlorosilane functionalized with amino acids as heterogeneous enantioselective catalysts

Abstract  Heterogeneous asymmetric catalysts using amino acids as chiral promoter were synthesized by attachment of amino acids such as l-glutamic acid and l-phenylalanine onto the hydrophilic part of hydrolyzed octadecyltrichlorosilane (OTS). The catalysts exhibited 12–18% enantiomeric excess (ee) for the asymmetric hydration of epoxycyclohexene to yield (1R,2R)-trans-1,2-cyclohexanediol and (1S,2S)-trans-1,2-cyclohexanediol.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0056-7
  • Authors
    • Hadi Nur, Universiti Teknologi Malaysia (UTM) Ibnu Sina Institute for Fundamental Science Studies 81310 Skudai, Johor Malaysia
    • Lim Kheng Wei, Universiti Teknologi Malaysia (UTM) Ibnu Sina Institute for Fundamental Science Studies 81310 Skudai, Johor Malaysia
    • Salasiah Endud, Universiti Teknologi Malaysia (UTM) Ibnu Sina Institute for Fundamental Science Studies 81310 Skudai, Johor Malaysia

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Gas phase degradation of acetone using a TiO2 photocatalyst supported on a polyester fabric

Abstract  The feasibility of using a titanium dioxide photocatalyst supported on polyester fabric for the removal of low concentrations of VOCs was evaluated. A series of experiments was conducted to evaluate photocatalytic efficiency in terms of the following: catalytic activity; reaction temperature; influence of mass transfer and type of VOC.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0057-6
  • Authors
    • Hana Žabová, Institute of Chemical Process Fundamentals of the AS CR, v.v.i Rozvojová 135 165 02 Prague Czech Republic
    • Bohumír Dvořák, Institute of Chemical Technology in Prague Department of Organic Technology Technická 5 166 28 Prague Czech Republic

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Kinetic and mechanistic study of photocatalytic degradation of 4,4′-biphenol in TiO2 suspension

Abstract  The photodegradation of 4,4′-biphenol (BIP) under a metal halide lamp followed the Langmuir–Hinshelwood kinetic model and the hydroxylation reaction was considered as the main initial step for BIP degradation on the basis of GC/MS analysis.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0060-y
  • Authors
    • Yanhua Gong, School of Resources and Environmental Science, Wuhan University Wuhan 430079 People’s Republic of China
    • Xu Zhang, School of Resources and Environmental Science, Wuhan University Wuhan 430079 People’s Republic of China
    • Lijie Bai, School of Resources and Environmental Science, Wuhan University Wuhan 430079 People’s Republic of China
    • Nansheng Deng, School of Resources and Environmental Science, Wuhan University Wuhan 430079 People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Kinetic modeling of sucrose hydrogenation in the production of sorbitol and mannitol with ruthenium and nickel-Raney catalysts

Abstract  Experimental and modeling studies in the catalytic hydrogenation of glucose and fructose were carried out for the production of sorbitol and mannitol on ruthenium and nickel catalysts. Ruthenium based catalyst showed better results when compared to the Ni-Raney catalyst, achieving close to 100% of reactant conversion after 3 h of reaction at 130 °C and 750 psia conditions. The application of hybrid autocatalytic kinetic models for the reaction network of the formation of sorbitol and mannitol led to simulation results that represented the data obtained experimentally well. The autocatalytic terms were observed in the concentration profiles of sorbitol and mannitol. From the correlation between the experimental data and the simulation results of the autocatalytic kinetic models, it was possible to determine the kinetic parameters of the hydrogenation using both the nickel and ruthenium catalysts (Ni/Raney and Ru/Al2O3, respectively).

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0071-8
  • Authors
    • Márcia C. M. Castoldi, Escola de Química, Universidade Federal do Rio de Janeiro (EQ-UFRJ), Ilha do Fundão, Centro de Tecnologia GREENTEC—Laboratório de Tecnologia Verde bloco E-sala 211 CEP 21949-900 Rio de Janeiro RJ Brazil
    • Leôncio Diógenes T. Câmara, Instituto Politécnico da Universidade do Estado do Rio de Janeiro (IPRJ-UERJ) Dep. Eng. Mecânica e Energia- DEMEC Nova Friburgo RJ Brazil
    • Donato A. G. Aranda, Escola de Química, Universidade Federal do Rio de Janeiro (EQ-UFRJ), Ilha do Fundão, Centro de Tecnologia GREENTEC—Laboratório de Tecnologia Verde bloco E-sala 211 CEP 21949-900 Rio de Janeiro RJ Brazil

Quelle: Reaction Kinetics and Catalysis Letters | 3 Sep 2009 | 8:41 am CEST

Glycerol hydrogenolysis to propylene glycol

Abstract  A nickel catalyst showed a considerable selectivity to propylene glycol (up to 98%) at 30% glycerol conversion, under moderate hydrogenation conditions: 200 °C reaction temperature, 20–25 bar hydrogen pressure, 5 wt% catalyst and unprecedented low reaction time of 8 h.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0032-2
  • Authors
    • Adriana Marinoiu, Research Center OLTCHIM S.A 1 Uzinei St Ramnicu Valcea 240050 Romania
    • Gheorghe Ionita, ANDRAD National Agency for Radioactive Waste Pitesti Romania
    • Costinela-Laura Gáspár, Research Center OLTCHIM S.A 1 Uzinei St Ramnicu Valcea 240050 Romania
    • Claudia Cobzaru, Technical University Iasi Faculty of Industrial Chemistry 71, D. Mangeron Ave Iasi 70050 Romania
    • Spiridon Oprea, Technical University Iasi Faculty of Industrial Chemistry 71, D. Mangeron Ave Iasi 70050 Romania

Quelle: Reaction Kinetics and Catalysis Letters | 21 Jul 2009 | 2:08 am CEST

Tap study of the impact of the oxidation state of Pt/PrCeZrO and Pt/GdCeZrO catalysts on their reactivity in the partial/deep oxidation of methane

Abstract  The temporal analysis of products (TAP) technique coupled with the oxygen TPD was used to elucidate the effects of the Pt-supported fluorite-like doped ceria–zirconia oxide chemical composition and the type of pretreatment on their oxygen bonding strength, mobility, and reactivity as related to catalytic properties in the partial oxidation of methane into synthesis gas. A rapid evolution of hydrogen under CH4 pulse observed for oxidized catalysts agrees with the direct route of the methane selective oxidation into syngas. This route is favored by the Pt-support interaction and a moderate bonding strength of surface oxygen species along with a high lattice oxygen mobility.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0040-2
  • Authors
    • Elena L. Gubanova, Université de Lyon - Université Claude Bernard Lyon1 Institut de Recherches sur la catalyse et l’environnement de Lyon (IRCELYON), UMR 5256 (CNRS/Université Claude Bernard Lyon1) 2 Avenue Albert Einstein Villeurbanne Cedex 69626 France
    • Vladislav A. Sadykov, Boreskov Institute of Catalysis SB RAS Pr. Lavrentieva 5 Novosibirsk 630090 Russia
    • Andre C. van Veen, Université de Lyon - Université Claude Bernard Lyon1 Institut de Recherches sur la catalyse et l’environnement de Lyon (IRCELYON), UMR 5256 (CNRS/Université Claude Bernard Lyon1) 2 Avenue Albert Einstein Villeurbanne Cedex 69626 France
    • Claude Mirodatos, Université de Lyon - Université Claude Bernard Lyon1 Institut de Recherches sur la catalyse et l’environnement de Lyon (IRCELYON), UMR 5256 (CNRS/Université Claude Bernard Lyon1) 2 Avenue Albert Einstein Villeurbanne Cedex 69626 France

Quelle: Reaction Kinetics and Catalysis Letters | 14 Jul 2009 | 1:09 pm CEST

Effect of ionic liquid BMImBr on palladium-catalyzed oxidation of ethylene with LiNO3

Abstract  Oxidative bromination of ethylene was found to proceed effectively in the presence of a catalytic system Pd(OAc)2–LiNO3 in two-component BMImBr–HOAc and three-component BMImBr–HOAc–H2O solvents. At a large content of BMImBr, conversion of ethylene was found to yield 1,2-dibromoethane with a selectivity over 95%. The composition of the Pd(OAc)2–LiNO3 solutions was followed during the reaction of ethylene by means of UV–Vis spectroscopy.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0043-z
  • Authors
    • Tatiana A. Balandina, Boreskov Institute of Catalysis, SB RAS Novosibirsk 630090 Russian Federation
    • Tatiana V. Larina, Boreskov Institute of Catalysis, SB RAS Novosibirsk 630090 Russian Federation
    • Dmitry V. Trebushat, Boreskov Institute of Catalysis, SB RAS Novosibirsk 630090 Russian Federation
    • Nikolai Yu. Adonin, Boreskov Institute of Catalysis, SB RAS Novosibirsk 630090 Russian Federation
    • Nina I. Kuznetsova, Boreskov Institute of Catalysis, SB RAS Novosibirsk 630090 Russian Federation

Quelle: Reaction Kinetics and Catalysis Letters | 14 Jul 2009 | 1:09 pm CEST

Facile preparation of visible-light-sensitive sulfur–nitrogen-codoped titanium dioxide

Abstract  S–N-codoped TiO2 powders have been synthesized through a facile one-step sol–gel method by using tetrabutyltitanate and thiourea as precursors. The S–N-codoped TiO2 treated at 500 °C showed the highest photocatalytic activity for degrading methylene blue under visible light irradiation. XRD, XPS and UV–vis studies revealed that the high visible-light photocatalytic activity of the doped TiO2 may originate from the synergetic effect of sulfur and nitrogen codoping into TiO2.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0051-z
  • Authors
    • Shujuan Zhang, College of Science, Tianjin University of Science & Technology, Tianjin, 300457 People’s Republic of China
    • Limin Song, College of Materials Science and Chemical Engineering & Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin, 300160 People’s Republic of China
    • Shuna Zhang, ZheJiang Industry Polytechnic College, Shaoxing, 312000 People’s Republic of China
    • Donglan Sun, College of Science, Tianjin University of Science & Technology, Tianjin, 300457 People’s Republic of China
    • Bin Chen, College of Materials Science and Chemical Engineering & Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin, 300160 People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 14 Jul 2009 | 1:09 pm CEST

Steady state energy distribution function of adatoms in reactive adsorption

Abstract  The interplay between the energy distribution function of adatoms and the rate of diatom formation in catalytic reaction is studied by means of mean field rate equations. The recombination of adatoms is described as a multi-channel process where adatom desorption arises from several energy levels. It is shown that the distribution function can be computed, analytically, as a function of the ratio between recombination probability and rate constant for energy disposal to the solid. This parameter is the key quantity of the kinetics since it governs both reaction rate and the shape of the energy distribution function. It is found that, in order to obtain steady state conditions, the control parameter is constrained within a well defined interval of values which result lower than unity. It is shown that a kinetic transition takes place for the highest value of the parameter, which entails hyperthermal reaction rate.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0039-8
  • Authors
    • Massimo Tomellini, Università di Roma Tor Vergata Dipartimento di Scienze e Tecnologie Chimiche Via della Ricerca Scientifica Rome 00133 Italy

Quelle: Reaction Kinetics and Catalysis Letters | 14 Jul 2009 | 1:09 pm CEST

Markedly enhancing the visible-light photocatalytic activity of LaFeO3 by post-treatment in molten salt

Abstract  The visible-light photoactivity of LaFeO3 prepared by conventional co-precipitation method can be markedly enhanced by a simple and efficient post-treatment method. The catalyst treated with molten KNO3 exhibited the highest rate constant of 0.061 min−1 and after 60 min visible-light irradiation, 98% Acid Red 18 was decolorized, which was much higher than P25 TiO2.

  • Content Type Journal Article
  • DOI 10.1007/s11144-009-0025-1
  • Authors
    • Jun Yang, Jinan University Department of Chemistry Guangzhou 510632 People’s Republic of China
    • Huiqiong Zhong, Jinan University Department of Chemistry Guangzhou 510632 People’s Republic of China
    • Ming Li, Jinan University Department of Chemistry Guangzhou 510632 People’s Republic of China
    • Lizhen Zhang, Jinan University Department of Chemistry Guangzhou 510632 People’s Republic of China
    • Yuanming Zhang, Jinan University Department of Chemistry Guangzhou 510632 People’s Republic of China

Quelle: Reaction Kinetics and Catalysis Letters | 11 Jul 2009 | 8:57 am CEST




 


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