The influence of various parameters on the oxidative coupling of methane reaction over lithium doped lanthanum oxide

The influence of reaction temperature, space velocity and methane and oxygen partial pressures were studied for the oxidative coupling of methane reaction (OCM) over a lithium doped lanthanum oxide catalyst. The kinetic data obtained with this catalyst, at temperatures between 650 and 750°C, indicat...

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Bibliographic Details
Published inCatalysis today Vol. 4; no. 3; pp. 333 - 344
Main Authors Kooh, A., Mimoun, H., Cameron, C.J.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1989
Elsevier Science
Subjects
Chemistry
Exact sciences and technology
Kinetics and mechanisms
Organic chemistry
Reactivity and mechanisms
Methane
Promoter
Catalytic reaction
Temperature
Hydrocarbon
Medium effect
Lanthanum Oxides
Lithium
Modified catalyst
Kinetics
Oxidative coupling
Pressure
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Summary:The influence of reaction temperature, space velocity and methane and oxygen partial pressures were studied for the oxidative coupling of methane reaction (OCM) over a lithium doped lanthanum oxide catalyst. The kinetic data obtained with this catalyst, at temperatures between 650 and 750°C, indicate that oxygen is adsorbed non-dissociatively and non-competitively. Product selectivities extrapolated to zero percent methane conversion are similar to those obtained with Li/MgO, suggesting that both rare earth and alkaline earth based catalysts involve similar mechanisms. Carbon monoxide and ethylene were found to be secondary products exclusively.
ISSN:0920-5861
1873-4308
DOI:10.1016/0920-5861(89)85029-1