Experimental study of incomplete oxidation of methane in a ring channel |
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Authors: | V V Kuznetsov O V Vitovsky O A Gasenko |
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Institution: | (1) Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia |
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Abstract: | Chemical transformations at incomplete methane oxidation in the air medium were studied experimentally at reaction activation
on the wall of an annular microchannel. Methane was oxidized incompletely on a rhodium catalyst deposited on an inner wall
of the channel. Concentrations of the products of chemical transformations were measured in the outlet gas mixture for different
reactor temperatures and stay times. We have determined the range of channel wall temperatures and stay times of the mixture
corresponding to an increase in the portion of hydrogen and carbon dioxide indicating transition from predominant methane
combustion to cascade chemical reactions with activation of steam and carbon dioxide methane conversions. It is shown that
the kinetic model of chemical transformations of methane in the air medium depends significantly on the temperature of channel
walls and stay time of the mixture. The effect of outer diffusion deceleration on the rate of chemical transformations at
incomplete methane oxidation under the strained conditions is determined.
The work was financially supported by the Russian Foundation for Basic Research (Grant No. 05-08-65526). |
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