Efficient Combustion of Methane in a Fluidized Bed of Catalyst
A. D. SIMONOV, N. A. YAZYKOV and YU. V. DUBININ
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090 (Russia)
simonov@catalysis.ru
Keywords: combustion, fluidized bed catalysis
Pages: 163–168
Abstract
The process of methane combustion in a fluidized bed of spherical oxide catalyst containing mixed copper and magnesium chromite on toughened alumina (IK–12–73) depending on the temperature and the concentration of methane in the mixture with air was studied. It has been demonstrated that the conversion level of methane oxidation into CO2 in the case of the methane content equal to 2 % increases from 72 % at 500 °С to 99 % at 700 °С. Increasing the concentration of methane to 8 % does not causes reducing the conversion level of methane oxidation within the temperature range 600–750 °С. It has been demonstrated that the concentration of nitrogen oxides in the course of methane combustion at the temperature values ranging within 500–750 °С does not exceed 3.5 ppm. The presence of H2 and CO in the reaction mixture does not causes increasing the conversion level of methane oxidation when the volume ratio CH4/(CO + H2) = 4 : 19.
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