SSZ-39分子筛的合成及应用进展

Advances on Syntheses and Applications of SSZ-39 Zeolites

近年来,小孔八元环SSZ-39分子筛因具有特殊的孔道结构和物理化学性质,在小分子择形催化反应中展现出相对优异的催化活性、抗积碳性和水热稳定性。本文概述了SSZ-39分子筛的合成历程,包括不同种类有机模板剂的使用、特定硅源铝源的选择以及凝胶组成的调控等;简要总结了SSZ-39分子筛在甲醇制低碳烯烃、氮氧化物的选择性催化还原以及合成气选择性转化制丙烷等过程中的应用进展;讨论了SSZ-39分子筛在合成与应用中仍面临的主要挑战和进一步发展方向。

In the past decade,small-pore zeolite SSZ-39 with large pear-shaped cages and 8-ring opening pores has been widely applied in shape selective catalysis of small molecules.In general,zeolite SSZ-39 could give excellent catalytic activity,good resistance to carbon deposition and high thermal stability in several catalytic reactions because of its unique pore architecture and physicochemical properties.In this review,the synthetic developments of zeolite SSZ-39 are comprehensively summarized,including the use of different types of organic structure directing agents(OSDA),the selection of specific silicon and aluminum sources,and the regulation of initial gel compositions.The recent progresses in application of zeolite SSZ-39 such as methanol to olefins,selective catalytic reduction of nitrogen oxides and selective conversion of syngas to propane are briefly introduced.The unsolved challenges related to zeolite SSZ-39 are outlined and the corresponding areas for future exploration in the synthesis and applications of zeolite SSZ-39 are discussed.