甲醇制烯烃催化剂SAPO-34分子筛的研究进展

Research Progress of SAPO-34 Molecular Sieve as Catalyst for Methanol to Olefins

煤经甲醇制低碳烯烃是替代石脑油路线制烯烃的工艺,高选择性、高活性和高稳定性的催化剂是甲醇制烯烃技术的关键。SAPO-34分子筛因具有特殊孔道结构,较弱的酸中心以及较高的低碳烯烃选择性成为了甲醇制烯烃反应的最佳催化剂。综述甲醇制烯烃催化剂SAPO-34分子筛失活原因,再生方法的研究现状,主要针对频繁再生过程中催化剂损耗原因进行分析,并对产生的废料再利用总结,提出甲醇制烯烃SAPO-34分子筛催化剂今后的发展方向。

The production of low carbon olefins from coal by methanol is a process instead of naphtha route to produce olefins.High selectivity,high activity and high stability of catalysts are the key to methanol to olefins technology.The SAPO-34 molecular sieve with special pore structure,weak acid center and high selectivity of low carbon olefin are the best catalysts for methanol olefin reaction.This paper summarizes the deactivation reasons and regeneration methods of SAPO-34 molecular sieve catalyst for methanol to olefins,mainly analyzes the causes of catalyst loss in the process of frequent regeneration,summarizes the reuse of waste,and puts forward the future development direction of SAPO-34 molecular sieve catalyst for methanol to olefins.