Thermodynamic analysis of single and two-step oxidative dehydrogenation of propane with carbon dioxide

Propane dehydrogenation (PDH) has received much attention to meet the ever-increasing propylene demand based on:(...)(۱)The reaction is highly endothermic and equilibrium limited. Consequently, the elimination of H۲ product by a mild oxidant such as CO۲ (via reverse water-gas-shift, reaction ۲) over suitable (non-redox oxides, e.g. Ga۲O۳) catalysts can increase equilibrium conversions [۱](...)(۲) The reaction can also occur in single-step over redox oxide (e.g., Cr۲O۳ and V۲O۵) catalysts:C۳H۸  CO۲ C۳H۶  CO  H۲O H ۲۹۸۰ ۱۶۴ kJ/mol (۳) The PDH in the presence of CO۲ is also of interest because it utilizes a greenhouse gas [۲].In this work, the chemical equilibria of single and two-step oxidative PDH with CO۲ are studied and the results are compared with those of simple conventional steam diluted PDH

کلیدواژه ها:

Oxidative dehydrogenation ، Carbon dioxide ، Propylene ، Thermodynamics