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对于直接以合成气作为原料,使用Cu-Zn-Al 和γ-Al_2O_3构成的双重催化剂、采用浆态床法合成二甲醚的反应体系,使用全混流反应器模型结合化学反应动力学进行模拟。组分方程使用超松弛迭代方法并结合C++编程进行求解,编制了计算机程序。通过模拟计算,讨论了压力、温度、空速、催化剂配比、反应气中不同氢碳比以及CO_2含量对反应收率、DME选择性的影响,并讨论了在不同氢碳比下对CO 转化率和CO 与H_2总转化率的影响,从而寻找合适的反应条件,为工业化生产提供参考。
For direct synthesis gas as raw material, a dual catalyst composed of Cu-Zn-Al and γ-Al 2 O 3 was used to synthesize dimethyl ether reaction system by slurry bed method. The reaction was simulated by using full mixed flow reactor model and chemical reaction kinetics. The component equations are solved using the over-relaxation iteration method combined with C ++ programming and a computer program is prepared. The effects of pressure, temperature, space velocity, catalyst ratio, the ratio of hydrogen to carbon in the reaction gas and the content of CO_2 on the reaction yield and DME selectivity were discussed through simulation. The effects of CO conversion Rate and the total conversion rate of CO and H_2 in order to find the appropriate reaction conditions for industrial production to provide a reference.