Oxidation of acrolein to acrylic acid on vanadium molybdenum oxide catalyst; The reaction kinetics

1983 ◽  
Vol 48 (3) ◽  
pp. 698-702 ◽  
Author(s):  
Josef Tichý ◽  
Jiří Kůstka ◽  
Jaroslav Machek
Keyword(s):  
Acrylic Acid ◽  
Molybdenum Oxide ◽  
Atmospheric Pressure ◽  
Oxide Catalyst ◽  
Conversion Degree ◽  
Through Flow ◽  
Individual Reaction ◽  
Flow Apparatus ◽  
Kinetics Of ◽  
Integral Reactor

The oxidation kinetics of acrolein have been studied in gas phase in the presence of vanadium molybdenum oxide catalyst. Using a through-flow apparatus with integral reactor, the effect has been studied of concentration of individual reaction components, i.e. acrolein, oxygen, steam and acrylic acid, on conversion degree of acrolein. The measurements have been carried out at atmospheric pressure. For evaluation of the kinetic data measured an equation has been suggested expressing dependence of the oxidation rate on the mentioned parameters.

Kinetics of vapor phase conversion of pyridine-2-carboxaldehyde on a vanadium-molybdenum oxide catalyst

1980 ◽  
Vol 15 (2) ◽  
pp. 251-255 ◽  
Author(s):  
R. A. Skolmeistere ◽  
O. V. Orbidane ◽  
L. J. Leitis ◽  
M. V. Shimanskaya
Keyword(s):  
Molybdenum Oxide ◽  
Vapor Phase ◽  
Oxide Catalyst ◽  
Phase Conversion ◽  
Kinetics Of

Determination of rate equations of catalytic oxidation of propene to acrolein and acrylic acid in the gas phase

1986 ◽  
Vol 51 (8) ◽  
pp. 1579-1586
Author(s):  
Jiří Švachula ◽  
Antonín Tockstein ◽  
Josef Tichý
Keyword(s):  
Acrylic Acid ◽  
Catalytic Oxidation ◽  
Gas Phase ◽  
Oxide Catalyst ◽  
Rate Equations ◽  
Nickel Iron ◽  
Cobalt Nickel ◽  
Flow Circulation ◽  
Kinetics Of

The kinetics of propene catalytic oxidation to acrolein and acrylic acid was studied in a flow-circulation reactor over a multicomponent oxide catalyst containing molybdenum, cobalt, nickel, iron, bismuth, and potassium. The rate equations were found for the total formation of acrolein and acrylic acid.

Study of mechanism of oxidation of acrolein on a vanadium-molybdenum oxide catalyst

1979 ◽  
Vol 44 (8) ◽  
pp. 2474-2479 ◽  
Author(s):  
Galya Y. Popova ◽  
Georgii K. Boreskov ◽  
Tamara V. Andrushkevich ◽  
Josef Tichý
Keyword(s):  
Carbon Dioxide ◽  
Acrylic Acid ◽  
Gas Phase ◽  
Molybdenum Oxide ◽  
Partial Oxidation ◽  
Oxide Catalyst ◽  
Pulse Technique ◽  
Redox Mechanism ◽  
Mechanism Of Oxidation

The mechanism of the incorporation of oxygen into the products of acrolein oxidation has been studied by a microcatalytic pulse technique with vibrating catalyst bed. It was found that acrylic acid is formed as the product of partial oxidation by stepwise redox mechanism and that in addition to the catalyst oxygen, also oxygen from the gas phase participates in carbon dioxide formation.

Kinetics of the catalytic hydrodesulphurization reaction system; hydrogenolysis of thiophene

1980 ◽  
Vol 45 (10) ◽  
pp. 2728-2741 ◽  
Author(s):  
Pavel Fott ◽  
Petr Schneider
Keyword(s):  
Atmospheric Pressure ◽  
Active Sites ◽  
Flow Reactor ◽  
Kinetic Equations ◽  
Reaction System ◽  
Reaction Products ◽  
Molybdenum Catalyst ◽  
Cobalt Molybdenum Catalyst ◽  
Kinetics Of ◽  
Reaction Schemes

Kinetics have been studied of the reaction system taking place during the reaction of thiophene on the cobalt-molybdenum catalyst in a gradientless circulation flow reactor at 360 °C and atmospheric pressure. Butane has been found present in a small amount in the reaction products even at very low conversion. In view of this, consecutive and parallel-consecutive (triangular) reaction schemes have been proposed. In the former scheme the appearance of butane is accounted for by rate of desorption of butene being comparable with the rate of its hydrogenation. According to the latter scheme part of the butane originates from thiophene via a different route than through hydrogenation of butene. Analysis of the kinetic data has revealed that the reaction of thiophene should be considered to take place on other active sites than that of butene. Kinetic equations derived on this assumption for the consecutive and the triangular reaction schemes correlate experimental data with acceptable accuracy.

Effect of ionizing radiation on the kinetics of hydrogenation on the Ni-MgO mixed catalyst

1982 ◽  
Vol 47 (7) ◽  
pp. 1780-1786 ◽  
Author(s):  
Rostislav Kudláček ◽  
Jan Lokoč
Keyword(s):  
Experimental Data ◽  
Activation Energy ◽  
Liquid Phase ◽  
Ionizing Radiation ◽  
Oxide Catalyst ◽  
Absorbed Dose ◽  
Hydrogenation Rate ◽  
Solution Composition ◽  
Mixed Catalyst ◽  
Kinetics Of

The effect of gamma pre-irradiation of the mixed nickel-magnesium oxide catalyst on the kinetics of hydrogenation of maleic acid in the liquid phase has been studied. The changes of the hydrogenation rate are compared with the changes of the adsorbed amount of the acid and with the changes of the solution composition, activation energy, and absorbed dose of the ionizing radiation. From this comparison and from the interpretation of the experimental data it can be deduced that two types of centers can be distinguished on the surface of the catalyst under study, namely the sorption centres for the acid and hydrogen and the reaction centres.

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