合成二甲醚过程中的多功能催化协同效应

Multifunctional Catalytic Synergy in the Dimethyl Ether Synthesis Process

借助甲醇合成催化剂C207与HZSM-5及γ-Al2O3组成的多功能催化剂,应用协同效应原理解释与分析了催化剂制备方法、组成、反应条件等对合成气直接制二甲醚的影响。实验发现,当使用脱水性能差的催化剂时,体系达到最佳协同的温度高于脱水性能好的催化剂。实验结果还表明增大空速及体系CO2浓度过高时,体系协同效应差。

In order to obtain the general rule to optimize the synergy, the effect of preparation method of catalyst, composition of catalyst and reaction conditions of the DME synthesis were explained and analyzed by synergy theory, taking multifunctional catalyst composed of C207 for methanol synthesis and HZSM-5 and γ-Al_2O_3 for methanol dehydration to DME as representatives. For the catalyst poor in dehydration, the temperature in which the synergy was most remarkable was higher than that for the catalyst good in dehydration. The synergy of system was weakened when the space velocity increased and the concentration of carbon dioxide was too much.