Kinetic and mechanistic aspects of the oxidative coupling of methane over a Li/MgO catalyst

J.A. Roos, S.J. Korf, R.H.J. Veehof, J.G. van Ommen, J.R.H. Ross

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The rate of reaction of methane with oxygen in the presence of a Li-doped MgO catalyst has been studied as a function of the partial pressures of CH4, O2 and CO2 in a well-mixed reaction system which is practically gradientless with respect to gas-phase concentrations. It is concluded that the rate determining step involves reaction of methane adsorbed on the catalyst surface with a di-atomic oxygen species. The adsorption of oxygen is relatively weak. Carbon dioxide acts as a poison for the reaction of methane with oxygen, this probably being caused by competitive adsorption on the sites where oxygen (and possibly also methane) adsorbs.
Original languageUndefined
Pages (from-to)131-145
JournalApplied catalysis
Issue number1
Publication statusPublished - 1989


  • IR-70461

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