SAPO-34分子筛晶种辅助合成SSZ-13分子筛  

Seed-assisted synthesis of SSZ-13 zeolite by using SAPO-34

作　　者：王艳悦 李玉平[1] 贾坤[1] 张翊[1] 李晓峰[2] 窦涛[2] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]太原理工大学精细化工研究所,山西太原030024

出　　处：《天然气化工—C1化学与化工》2016年第4期5-9,共5页Natural Gas Chemical Industry

基　　金：山西省基础研究项目(2012011005-7);国家自然科学基金(20973123)资助项目

摘　　要：在水热合成体系中,对以SAPO-34作为异质晶种制得纯相SSZ-13分子筛的合成条件进行了考察,并与SSZ-13为晶种的合成产物进行对比研究,同时考察了其甲醇制烯烃(MTO)反应性能。结果表明,适量SAPO-34分子筛的加入可对SSZ-13分子筛的合成起到辅助晶化的作用,有效抑制杂晶并提高产物结晶度,已焙烧或结晶度较低的SAPO-34分子筛的辅助晶化效果更明显。以SAPO-34异质晶种与SSZ-13同质晶种合成的SSZ-13产物相比,具有相似的物化性质、酸性质以及催化性能,由此说明SAPO-34可以替代SSZ-13作为SSZ-13分子筛的合成晶种。The effects of synthetic conditions on the synthesis of SSZ-13 zeolite using the SAPO-34 zeolite as heterogeneous seed were investigated in a hydrothermal system by comparing the synthesis using the SSZ-13 zeolite as homogeneous seed, and their catalytic activities for methanol to olefins （MTO） reaction were tested. The results show that the addition of SAPO-34 zeolite could assist crystallization in the synthesis of SSZ-13 zeolite, effectively inhibit the formation of impure crystal and improve product crystallinity. In addition, the SAPO-34 zeolites calcined or with low-crystallinity could play more effective assisting crystallization role. Compared with the SSZ-13 obtained from homogeneous seeds, the products from SAPO-34 heterogeneous seeds exhibited similar physico-chemical property, acid property and catalytic performance, which suggest that SAPO-34 zeolite can replace SSZ-13 as the seed for synthesizing SSZ-13 zeolites.

关 键 词：SSZ-13分子筛 SAPO-34分子筛 品种 水热合成 MTO 

分 类 号：O643.3[理学—物理化学] TQ426.94[理学—化学]