甲醇制烯烃用ZSM-5分子筛的研究进展

摘要

This paper summarizes the recent developments of methanol-to-olefin (MTO/MTP) conversion over ZSM-5 molecular sieves,including synthesis mechanism of MTO/MTP,influence of pore structure and surface acid of ZSM-5 on its catalytic activity for MTO/MTP conversion,as well as modification of molecular sieve. The review focuses on the effect of modification of molecular sieve on pore size and surface acidity of catalyst,selectivity of light olefins,as well as stability of catalyst. The modification methods include hydrothermal treatment,phosphorus,fluorine,boron,metal ions, and other chemical modification. Regulation of surface acid and pore size of catalyst,and MTO/MTP reaction mechanism are research directions in the future for the synthesis of olefins from methanol.%综述了甲醇制烯烃用ZSM-5分子筛催化剂的研究进展，包括甲醇制低碳烯烃的合成机理、ZSM-5分子筛的结构与酸性对合成低碳烯烃性能的影响以及分子筛的改性。重点探讨了ZSM-5分子筛的改性（如水热处理改性、磷改性、氟改性、硼改性、金属离子改性及其他化学改性）对催化剂表面酸性和孔径、低碳烯烃选择性和催化剂稳定性的影响，指出分子筛孔径/表面酸性的调控和 MTO/MTP反应机理的研究是甲醇制低碳烯烃催化剂研究的发展方向。