二氧化碳加氢制甲醇反应机理研究及催化剂的研发进展

A Review of CO_(2) Catalytic Activation Mechanism in CO_(2) Hydrogenation Reaction and the Catalysts

本文总结了二氧化碳在加氢制甲醇反应中的催化活化机理,在这个反应中二氧化碳吸附在碱性中心(金属氧化物)并活化,而氢气则是在金属中心进行吸附和还原,两个活性中心必须足够接近并且具备一定的空间结构才能保证反应的顺利进行。本文还概括了在催化剂铜氧化锌、铜氧化锆、铜氧化铈上二氧化碳加氢过程中的反应机理研究。在二氧化碳加氢制甲醇反应中,铜-氧化锌工业催化剂的研究显示,目前还没有一种催化剂同时具备高二氧化碳转化率和高甲醇选择性。

The CO_(2) catalytic activation mechanism in the reaction of CO_(2) hydrogenation for methanol synthesis was concluded in this review.CO_(2) was adsorbed and activated on the basic sites,and H2 was adsorbed and reduced on the metallic sites.These two sites should be close enough to each other and have desired orientations to lead to successful reactions.The reaction mechanism on catalysts Cu-ZnO,Cu-ZrO_(2),and Cu-CeO_(2) was introduced.The study of Cu-ZnO catalysts for CO_(2) hydrogenation for methanol synthesis indicated there was no catalyst yet offering both high CO_(2) conversion and high methanol selectivity.