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, th e methane concentration was up to 4.5 vol%, and the oxygen content was up t o stoichiometry. The higher the catalyst activity, the lower the probabilit y for the homogeneous continuation of the catalytic reaction to proceed, ev en at 800 degreesC with the stoichiometry gas mixture composition. The dist ance over which alkyl peroxide catalysts escape from the catalyst surface u nder reaction conditions was estimated. (C) 2001 Academic Press.