Methanation of carbon dioxide by hydrogen reduction – a thermodynamic analysis

The paper presents a thermodynamic analysis of the methanation of carbon dioxide by hydrogen reduction. Equilibrium gas phase composition was determined by means of parametric equations. Calculations were performed for the temperature range T = 500 – 700 K and the initial composition xCO20∈(0−1)${\rm{x}}_{C{O_2}}^0 \in (0 - 1)$. A crucial parameter for catalytic processes, carbon precipitation range [C]=f(T,xCO20)${\rm{x}}_{C{O_2}}^0 \in (0 - 1)$ was presented as a function of temperature and an initial gas phase CO2-H2 composition. The CO2 conversion efficiency and the methane yield in the process was determined. Obtained results may be used for experimental research prediction and in industrial pragmatic