Kinetics and Catalysis

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Mechanism of phthalic anhydride formation in the oxidation of n-pentane on a vanadium-phosphorus oxide catalyst
Kinetics and Catalysis - - 2006
V. A. Zazhigalov, E. V. Cheburakova, M. Gansior, J. Stoch
The reaction paths of product formation in the partial oxidation of n-pentane on vanadium-phosphorus oxide (VPO) and VPO-Bi catalysts are considered. The condensed products of n-pentane oxidation were analyzed by chromatography-mass spectrometry, and the presence of C4 rather than C5 unsaturated hydrocarbons was detected. It was found that the concentration of phthalic anhydride in the products in...... hiện toàn bộ
Effect of the acidity and chemical nature of the protonating agent on the rate of acetylene reduction catalyzed by the nitrogenase active site isolated from the enzyme
Kinetics and Catalysis - Tập 53 - Trang 306-312 - 2012
T. A. Bazhenova, N. V. Kovaleva, G. N. Petrova
The effect of the acidity (pK a) of the source of protons on the rate and selectivity of acetylene reduction has been investigated in order to elucidate the mechanism of protonation of substrate molecules coordinated to the reduced FeMoco cluster. A number of compounds whose pK a in DMF varies between 6 and 20 have been examined as protonating agents. The rate of th...... hiện toàn bộ
Synthesis of nanosized thin-film bimetallic catalysts based on mesoporous TiO2 for microstructured reactors
Kinetics and Catalysis - - 2013
Л. Б. Охлопкова, Е. В. Матус, И.З. Исмагилов, М. А. Керженцев, З. Р. Исмагилов
Formation of the Ni–CrOx/MgO and Ni/MgO Catalysts for Carbon Dioxide Reforming of Methane
Kinetics and Catalysis - - 2001
V. Yu. Bychkov, V. N. Korchak, O. V. Krylov, O. S. Morozova, T. I. Khomenko
Temperature-programmed reduction by hydrogen, temperature-programmed desorption of O2, local X-ray spectral analysis, and scanning electron microscopy are used to study redox processes occurring on the Ni–Cr2O3/MgO and Ni/MgO catalysts for carbon dioxide reforming of methane. The reduction of Ni/MgO leads to the formation of nickel clusters distributed over the surface of MgO. During the reduction...... hiện toàn bộ
A comparative study of Ir/Ga2O3, Pt/Ga2O3, and Ru/Ga2O3 catalysts in selective hydrogenation of crotonaldehyde
Kinetics and Catalysis - Tập 49 - Trang 574-580 - 2008
E. Gebauer-Henke, J. Farbotko, R. Touroude, J. Rynkowski
Catalytic performance of gallia-supported iridium catalysts in the reaction of selective hydrogenation of crotonaldehyde in the gas phase was studied and compared to that of platinum and ruthenium catalysts. The best catalytic properties in terms of the selectivity to crotyl alcohol are shown by 5 wt % Pt/α-Ga2O3 and 5 wt % Ir/α-Ga2O3 catalysts prepared from nonchlorine precursors: Pt(acac)2 and I...... hiện toàn bộ
Properties of surface compounds in methanol conversion on γ-Al2O3: Data of in situ IR spectroscopy
Kinetics and Catalysis - - 2009
В. А. Матышак, Л. А. Березина, О. Н. Сильченкова, V. F. Tret’yakov, Guang Lin, A. Ya. Rozovskii
High-temperature ammonia oxidation over a platinum catalyst under conditions of the parallel formation of nitrogen-containing products
Kinetics and Catalysis - Tập 56 - Trang 335-342 - 2015
V. V. Kalugin, V. V. Kalinchak, A. S. Chernenko
Experimental data on the effect of the temperature of air containing low ammonia concentrations on the temperature and rate of catalytic ammonia combustion over a platinum catalyst as a function of the NH3 concentration and catalyst particle diameter are analyzed with account taken of thermal radiation under the assumption that nitrogen and nitric oxide form in parallel. At relatively low air temp...... hiện toàn bộ
Mechanical mixtures of Me (Ni, Pd) Ce oxides and silica-supported heteropolyacids: Role and optimal concentration of each active species in n-hexane isomerization
Kinetics and Catalysis - Tập 47 - Trang 20-24 - 2006
R. Hubaut, B. Ouled Ben Tayeb, W. Kuang, A. Rives, M. Fournier
Catalytic properties of silica-supported heteropolyacids (HPA) in a mechanical mixture with reduced Me-Ce oxides (Me = Ni, Pd) in n-hexane isomerization are studied. The role of each component of the mixed oxides (Ce and, typically, Ni and Pd) and their optimum content has been illuminated: cerium is not only beneficial for eliminating or preventing coke deposition but is also effective for mainta...... hiện toàn bộ
Kinetics of catalytic oxidation of benzoin to benzil by alumina supported active MnO2
Kinetics and Catalysis - Tập 51 - Trang 244-249 - 2010
S. Azizian, A. Eftekhari-Bafrooei, H. Bashiri
The kinetics of benzoin oxidation to benzil over MnO2/Al2O3 was studied by investigation of the effect of initial concentration of reactant and product, catalyst mass and also temperature on the reaction rate. On the basis of obtained experimental data a rate law for the kinetics of reaction was proposed and then the reaction rate constants and activation energy of reaction were computed. Finally ...... hiện toàn bộ
One-pot three-component Mannich reaction catalyzed by iodine under solvent-free conditions
Kinetics and Catalysis - Tập 52 - Trang 397-400 - 2011
Li Gang, Long Ruiling, Yang Jiangli
One-pot three-component Mannich reactions of ketones with aromatic aldehydes and aromatic amines are effectively catalyzed by molecular iodine at room temperature under solvent-free conditions to afford the corresponding β-amino carbonyl compounds with moderate to excellent yields. The method has the following advantages: no use of solvent, mild condition, high reaction speed and small quantity of...... hiện toàn bộ
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