Catalytic Performance of In/HZSM‐5 for Coupling Propane with CO <sub>2</sub> to Propylene
Haifeng Tian, Jiankang Liao, Fei Zha, Xiaojun Guo, Xiaohua Tang, Yue Chang, Xiaoxun Ma
Abstract
Abstract The dehydrogenation of propane to propylene is endothermic reaction will generate hydrogen, while the hydrogenation of CO 2 to light olefins is exothermic reaction with hydrogen as reactant. Using the CO 2 hydrogenation reaction to consume the hydrogen from the propane dehydrogenation reaction, which is more beneficial to propylene generation. Thus, a promising approach of coupling propane with CO 2 to produce propylene was proposed. A simple wetness impregnation method was used to prepare the In/HZSM‐5 composite catalyst for this coupling reaction. It was characterized by means of XRD, SEM, TEM, H 2 ‐TPR, NH 3 ‐TPD, XPS, TG, and N 2 isothermal adsorption‐desorption. Effects of indium loading, feed volume ratio of propane to CO 2 , reaction pressure and temperature on the coupling of propane with CO 2 to propylene were investigated in a fixed‐bed reactor. When the mass content of indium is 12%, the feeding volume ratio of propane to CO 2 is 1 : 4, the reaction pressure is 0.3 MPa and the reaction temperature is 580 °C, the propylene selectivity is 71.41%, as well as the conversion per pass of propane and CO 2 is 17.74% and 5.08%, respectively.