多级孔IM-5分子筛的简易制备及其在甲烷芳构化中的催化性能

摘要

A novel hierarchically porous IM-5-H zeolite material was prepared through one-step crystallization route by means of adjusting the synthesis parameters without introducing any secondary template.The hierarchical IM-5-H zeolite is quite different from the conventional IM-5-C in morphology,textural and acidic properties.After loading Mo,the Mo-IM-5-H catalyst exhibits high activity and stability in non-oxidative aromatization of methane,with a methane conversion of 13.1％ and aromatics yield of 7.5％,owing to the mesopores in the IM-5-H zeolite crystals.This work provides a simple way to synthesize hierarchical IM-5 zeolite and expands the application of micro-mesoporous composite material in methane dehydroaromatization.%采用一步水热晶化法、不添加第二模板剂、仅通过控制合成条件,制备了具有多级孔道结构的IM-5-H分子筛.多级孔IM-5-H材料展现了与常规IM-5-C分子筛不同的形貌、结构和酸性质.由于IM-5-H分子筛载体介孔结构的促进作用,钼基Mo-IM-5-H催化剂在甲烷无氧芳构化反应中表现出较高的甲烷转化率(13.1％)、芳烃产率(7.5％)和稳定性.该研究为合成多级孔IM-5材料提供了一种简便的方法,同时扩展了微孔-介孔复合材料在甲烷芳构化反应中的应用.