Synthesis and separation performance of silicalite-1 membranes on silica tubes  

作　　者：CHEN HongLiang LI YanShuo ZHU GuangQi YANG WeiShen 

机构地区：[1]Shenyang Key Laboratory of Environmental Engineering,Shenyang 110044,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

出　　处：《Science China Chemistry》2009年第5期579-583,共5页中国科学（化学英文版）

基　　金：Supported by the National Advanced Materials Committee of China (Grant No. 2003AA328010);the Ministry of Science and Technology of China (Grant No. G2003CB615802)

摘　　要：High-performance silicalite-1 membranes were synthesized on silica tubes by in-situ hydrothermal synthesis. By using the “solution-filling (SF)” method, the average flux of membranes with the SF method was improved by about 25% compared to that of the membranes without using the SF method; the flux and the separation factor of the membranes prepared with the SF method for an ethanol/water mixture at 60°C were 0.99 kg/(m2·h) and 73, respectively. It was found that the membranes synthesized on silica tubes exhibited high thermal stability and high reproducibility, and the relatively standard deviations (R.S.D.) of the average flux and separation factor were only 9.6% and 5.6%, respectively, which suggests that the silica support is more suitable than other kinds of supports for preparing high-performance silicalite-1 membranes.High-performance silicalite-1 membranes were synthesized on silica tubes by in-situ hydrothermal synthesis. By using the "solution-filling (SF)" method, the average flux of membranes with the SF method was improved by about 25% compared to that of the membranes without using the SF method; the flux and the separation factor of the membranes prepared with the SF method for an ethanol/water mixture at 60 ℃ were 0.99 kg/(m2·h) and 73, respectively. It was found that the membranes synthesized on silica tubes exhibited high thermal stability and high reproducibility, and the relatively standard deviations (R.S.D.) of the average flux and separation factor were only 9.6% and 5.6%, respectively, which suggests that the silica support is more suitable than other kinds of supports for preparing high-performance silicalite-1 membranes.

关 键 词：SILICALITE-1 MEMBRANE separation performance PERVAPORATION SILICA TUBE 

分 类 号：TN11[电子电信—物理电子学]