分子筛骨架结构和酸性对其甲醇制烯烃(MTO)催化性能影响研究进展

Recent research progresses in the effect of framework structure and acidity of zeolites on their catalytic performance in methanol to olefins(MTO)

甲醇制烯烃(MTO)作为一条由煤、天然气及生物质等含碳资源制备重要化学品的非石油路线,近年来备受人们关注。分子筛作为MTO的催化剂,其催化性能和MTO反应行为与其骨架结构和酸性特征密切相关,而认识这些关系对研发新型高效MTO催化剂和改进反应工艺具有重要意义。为此,研究简述了近年来有关甲醇转化制烯烃过程中分子筛催化活性及反应机理的理论和实验研究进展。重点讨论了不同分子筛在MTO过程中烃池物种、反应路线以及催化动力学方面的差异,分析了分子筛催化剂的骨架结构及酸性对其MTO催化性能的影响。

The conversion of methanol to olefins from multifarious carbon resources such as coal, （MTO）, as a non-petroleum route to get valuable chemicals natural gas and biomass, has attracted extensive attentions in recent years. The catalytic performance of acidic zeolites used in MTO is closely related to their framework structure and acidic properties; a clear understanding on this relation is of benefits to the development of better zeolite catalysts and improvement of current processes for MTO. Therefore, in this paper, we attempt to make a review on the recent research progresses in the effect of framework structure and acidity of zeolites on their catalytic performance in MTO. The review was focused on the difference of various zeolites in the hydrocarbon pool species, reaction pathway and catalytic kinetics; especially, the relation between the framework structure and acidic properties of zeolites and their catalytic performance in MTO was expatiated.