具有二次介孔分子筛材料的制备和应用

综述了近年来分子筛二次介孔的制备方法和应用进展。以不同手段在现有分子筛的基础上制备二次介孔，是目前常用微孔-介孔复合孔结构分子筛材料的制备方法。制备方法可分为高温热处理、水蒸汽热处理、碱处理、酸处理、化学试剂处理和二次合成等。二次介孔的应用以工业催化领域为重点，详细介绍了在裂化反应、芳构化反应、异构化反应和烷基化反应中的应用。二次介孔的出现促进了反应物和产物的扩散和分子筛的容碳能力，促进了反应的进行，而保留的分子筛的微孔结构仍具有很好的择形性能。

Advances in preparation and application of zeolites with secondary mesopores

The approaches for generation of secondary mesopores in zeolite crystals and application of zeolites with secondary mesopores were reviewed.Generation of secondary mesopores in situ in zeolite crystals is the most frequently adopted way for preparation of zeolites with both micropores and mesopores,which may be classified as high temperature,steaming,alkaline leaching,acid leaching,chemical treatment and secondary synthesis.Application of the zeolites with secondary mesopores as the catalysts for fluid catalytic cracking(FCC),aromatization,isomerization and alkylation was reviewed in detail.Existence of mesopores promotes diffusion of molecules of the reactants and products and enhances the tolerance to carbonaceous deposits,while the coexisting micropores have good shape-selective properties.