A mechanistic study on the oxidative coupling of methane over lithium doped magnesium oxide catalysts

J.W.M.H. Geerts, J.M.N. Kasteren, van, K. Wiele, van der

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Abstract

To elucidate the importance of various reaction steps in the oxidative convers ion of methane, experiments were carried out with three reaction products: ethane, ethylene and carbon monoxide. These products were studied seperately, in oxidation experiments with and without a catalyst. Moreover , the effect of admixing them to a methane/oxygen feed was investigated. All experiments were carried out in a micro flow tubular quartz reactor, which was empty or filled with catalyst. The temperature was 800 C. The ethane and ethylene experiments have learnt that: - ethane to ethylene convers ion is much more rapid than ethane combustion, irrespective of the presence of a catalyst. The main path of combustion leads via ethylene -ethane is converted much more rapid than methane. This imposes serious constraints to maximum attainable yields. - The principal combustion product in absence of a catalyst is CO. With a catalyst C02 is dominating. This agrees well with the rapid catalytic oxidation observed with CO/02 feeds. The conclusions can be summarized in a simplified overall reaction scheme.
Original languageEnglish
Title of host publicationHydrocarbons : source of energy : proceedings of the 1st seminar on the results of the sub-programme "Optimization of the production and utilization of hydrocarbons", held in Lyon, France, 21-23 September, 1988
EditorsG. Imarisio, M. Frias, J.M. Berntgen
Place of PublicationLondon
PublisherGraham and Trotman
Pages4-440
ISBN (Print)1-85333-287-9
Publication statusPublished - 1988

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