Limiting Thermodynamic Cycles of Catalytic Methane Oxidation

M. S. Safonov, B. N. Okunev, and P. A. Zhatikov

Faculty of Chemistry, Moscow State University, Vorob’evy gory, Moscow, 119899 Russia

Received November 12, 2002

Abstract—An ideal closed cycle of methane oxidation by oxygen with circulation of a flow of carbon dioxide
was considered. The cycle included the adiabatic-isothermal stage of flameless catalytic methane oxidation
combined with the work of gas expansion, complete recuperation of heat, and isothermal gas compression. This
cycle was shown to determine the limiting thermodynamic efficiency of chemical fuel oxidation at a given high-
est cycle temperature. Equations of adiabatic–isothermal of carbon dioxide methane conversion and the oxida-
tion of the conversion products by oxygen were derived. The problems of including the adiabatic–isothermal
step conversion stages in the cycle for methane oxidation were analyzed. Problems of practical implementation
of limiting cycles are discussed.

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