The dehydrogenation of propane to propylene is endothermic reaction will generate hydrogen, while the hydrogenation of CO₂ to light olefins is exothermic reaction with hydrogen as reactant. Using the CO₂ 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 CO₂ 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, H₂‐TPR, NH₃‐TPD, XPS, TG, and N₂ isothermal adsorption‐desorption. Effects of indium loading, feed volume ratio of propane to CO₂, reaction pressure and temperature on the coupling of propane with CO₂ to propylene were investigated in a fixed‐bed reactor. When the mass content of indium is 12%, the feeding volume ratio of propane to CO₂ 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 CO₂ is 17.74% and 5.08%, respectively.

中文翻译：

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In / HZSM-5催化丙烷与CO2偶联成丙烯的催化性能

丙烷脱氢为丙烯是吸热反应，会产生氢气，而CO ₂氢化为轻质烯烃则是以氢为反应物的放热反应。使用CO ₂氢化反应消耗丙烷脱氢反应中的氢，这对丙烯的生产更有利。因此，提出了将丙烷与CO ₂偶联以生产丙烯的有前途的方法。一种简单的湿法浸渍方法被用于制备用于该偶联反应的In / HZSM-5复合催化剂。通过XRD，SEM，TEM，H ₂ -TPR，NH ₃ -TPD，XPS，TG和N _{2对其进行}表征等温吸附-解吸。在固定床反应器中研究了铟负载量，丙烷与CO _2的进料体积比，反应压力和温度对丙烷与CO ₂与丙烯的偶联的影响。当铟的质量含量为12％时，丙烷与CO ₂的进料体积比为1：4，反应压力为0.3 MPa，反应温度为580°C，丙烯的选择性为71.41％，并且丙烷和CO ₂的单程转化率分别为17.74％和5.08％。