Deep oxidation of methane on alumina-manganese and Pt-containing catalysts

The kinetics of deep methane oxidation was studied over a manganese-alumina catalyst and a reference catalyst-a tableted mechanical mixture of 2% Pt + gamma -Al2O3. The reaction temperature ranged from 400 to 800 degreesC, the methane concentration was up to 4.5 vol%, and the oxygen content was up to stoichiometry. The higher the catalyst activity, the lower the probability for the homogeneous continuation of the catalytic reaction to proceed, even at 800 degreesC with the stoichiometry gas mixture composition. The distance over which alkyl peroxide catalysts escape from the catalyst surface under reaction conditions was estimated. (C) 2001 Academic Press.