Preparation of high selectivity silicalite-1 membranes by two-step in situ hydrothermal synthesis  

作　　者：CHEN HongLiang LI YanShuo YANG JiSong HOU YongXia SONG XueYing HU XiaoJun YANG WeiShen 

机构地区：[1]Key Laboratory of Regional Environment and Eco-Remediation （Shenyang University） of the Ministry of Education, Shenyang 110044, China [2]State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

出　　处：《Chinese Science Bulletin》2011年第33期3578-3582,共5页

基　　金：supported by the National Science Fund for Distinguished Young Scholars (20725313);the National Basic Research Program (2003CB615802)

摘　　要：High selectivity silicalite-1 membranes were synthesized on silica tubes by in situ hydrothermal synthesis. Using a two-step synthesis, a membrane with a separation factor of 99 was prepared for separating an ethanol/water mixture at 60°C. The average (n = 4) flux and separation factor of the membranes were 0.47 kg m-2 h-1 and 89, respectively. The membranes exhibited high reproducibility, and the relative standard deviation of the average (n = 4) flux and separation factor were only 5.3% and 9.2%, respectively. These results suggest that silica is a suitable support for synthesis of high-performance silicalite-1 membranes.High selectivity silicalite-1 membranes were synthesized on silica tubes by in situ hydrothermal synthesis. Using a two-step syn- thesis, a membrane with a separation factor of 99 was prepared for separating an ethanol/water mixture at 60℃. The average （n = 4） flux and separation factor of the membranes were 0.47 kg m-2 h-1 and 89, respectively. The membranes exhibited high repro- ducibility, and the relative standard deviation of the average （n=4） flux and separation factor were only 5.3% and 9.2%, respectively. These results suggest that silica is a suitable support for synthesis of high-performance silicalite-I membranes.

关 键 词：原位水热合成 合成制备 高选择性 膜 分离因子 乙醇/水 分离系数 相对标准 

分 类 号：TB43[一般工业技术]