摘要
介绍了以二乙胺(DEA)为模板剂,水热合成法合成了SAPO分子筛.采用XRD,SEM,FT-IR,NMR等表征手段系统考察了各种合成条件对SAPO-5和SAPO-34分子筛合成的影响.结果表明,通过调节水热合成条件,S APO-5和SAPO-34可以选择性的形成.DEA加入量、硅含量、陈化时间、晶化时间及Si/Al对产品的结晶度及晶相组成影响较大.较长的晶化时间以及较高的Si/Al有利于合成纯SAPO-34分子筛.相反,较易形成SAPO-5分子筛AFI结构.
SAPO molecular sieves were synthesized using hydrothermal method and diethylamine（ DEA） as the template in this article. The products had been investigated by XRD,SEM,FT-IR,and NMR spectroscopy,which clearly revealed that SAPO-5 and SAPO-34 molecular sieves are phase-selectively obtained via adjusting the synthesis parameters. The results show that,the crystallinity and phases of products were affected by the dosage of DEA and silicon,the time of aging,crystallization time and Si / Al. The results indicate that longer crystallization time and higher Si / Al are favorable conditions for SAPO-34. On the contrary,it will form the SAPO-5 zeolites（ AFI）.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2016年第3期253-259,共7页
Journal of Molecular Catalysis(China)
基金
辽宁省自然科学基金项目(201202126)~~
