【摘要】 随着世界工业的发展 ,含碳物质氧化的最终产物CO2 的排放量与日俱增 ,CO2 温室气体对环境的污染已引起人们广泛的关注 .研究证明 ,CO2 可作为单体转化为烃进行二次利用 ,是最有前景的抑制其大量排放的途径 .在化学反应工程上 ,热力学研究可以为反应体系提供一个反应物转化率的理论最大值 ,从而更加清楚地认识这一反应体系 ,为衡量催化剂的效果提供有利的尺度 ,进而指导催化剂的开发工作 .对CO2 加氢合成低碳烯烃反应体系平衡时进行了热力学研究 ,通过数学方法对催化作用下反应体系的热力学参数进行求解 ,分析了反应体系平衡时各相的平衡组成及其同温度、压力和氢 /碳比之间的关系 .结果表明 ,CO2 理论最高转化率为 6 9%～ 71% .更多还原

【Abstract】 With the development of the worldwide industries, environmental pollutions regarding the greenhouse gas carbon dioxide, which is the ultimate oxidative product of carbon-containing substance (or compound), have aroused extensive attention of the world. The most promising approach to restrain its emission, as suggested, is that carbon dioxide could be used as a monomer for alkenes’ inversion and reutilization. A theoretical maximal yield, and also better understanding of the reaction system, can be achieved from the thermodynamic investigation in chemical reaction engineering, which will thereby provide a favorable evaluation of the chemical catalyst effect and further guide the exploitation of catalysts. The balanceable reaction system for hydrogenation of carbon dioxide to light alkenes was thermodynamically investigated. The thermodynamic parameters for the catalytic system were solved by means of mathematics, and the relations between equilibrium constitute, temperature, pressure and carbon/hydrogen ratio in the reaction system were analyzed. The result showed that the maximum conversion of carbon dioxide falls in 69%～71%.更多还原