CO2加氢合成乙醇热力学分析及催化研究进展

综述了CO2的分子结构及性质、CO2加氢合成乙醇催化剂的催化性能和该反应的反应机理;还对CO2加氢合成乙醇反应进行了热力学分析,计算出不同反应条件下系统的平衡组成和CO2平衡转化率,并讨论了反应温度、压力及进料比对CO2平衡转化率的影响。结果表明,CO2平衡转化率随温度的升高而下降,增大反应体系的压力和采用高的氢碳比,对提高CO2平衡转化率有利。

Thermodynamic Analysis and Progress in Synthesis of Ethanol by Catalytic Hydrogenation of CO2

The synthesis of ethanol from CO2 hydrogenation was reviewed.The character of CO2,the catalytic performances of some catalysts and the reaction mechanism of CO2 hydrogenation to ethanol were summarized.The thermodynamic equilibrium analysis for this reaction was also made.In order to gain the influence factors,the effect of different temperature,pressure and the ratio of feed on the conversion of CO2 were discussed.The results show that the equilibrium conversion rate of CO2 decreases with increasing temperature,decreasing pressure and the ratio of n(H2)/n(CO2) in the reaction gas.