Abstract
The thermodynamic equilibrium for the steam-carbon dioxide conversion of methane was studied by Gibbs energy minimization. The degree of coke formation, the content of methane and carbon dioxide in the synthesis gas, and the synthesis gas H2/CO ratio were plotted as functions of the molar ratios of CO2/CH4 and H2O/CH4 in the initial mixture at different temperatures and pressures. The regions of the optimum CH4/CO2/H2O molar ratios for steam-carbon dioxide conversion were discovered, with no coke formation taking place in these regions. The optimized CH4/CO2/H2O molar fractions characterized by the minimum content of methane and carbon dioxide in the synthesis gas were found for each region.
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