T型分子筛膜的合成、表征与渗透汽化性能  

Synthesis,Characterization and Pervaporation Performances of Zeolite T Membranes

作　　者：周荣飞[1,2] 胡娜[1] 袁慧[1] 朱美华[1] 王振卓[1] 陈祥树[1,2] 

机构地区：[1]江西师范大学化学化工学院,南昌330022 [2]江西师范大学江西省无机膜材料工程技术研究中心,南昌330022

出　　处：《无机化学学报》2009年第8期1439-1446,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家重大国际合作项目(2006DFB53070);江西省自然科学基金(2007GZH0165);江西省教育厅项目(赣教技字[2007]120号);江西省教育厅项目(GJJ08168)资助

摘　　要：采用二次生长法,在不锈钢、α-Al2O3和莫来石多孔管状支撑体上分别合成了高渗透汽化性能的T型分子筛膜。考察了合成条件如合成时间、n(SiO2)/n(Al2O3)、n(H2O)/n(Al2O3)和硅源等对T型分子筛膜形成和分离性能的影响。通过XRD和SEM表征了膜的晶相和形貌。在优化的合成条件下,高质量T型分子筛膜的制备具有很好的重复性。在348K、水/异丙醇(10/90,w/w)体系中,不锈钢支撑体上形成的T型分子筛膜的通量和分离因子分别高达5.87kg.m-2.h-1和2420。相比较,在α-Al2O3和莫来石支撑体表面合成的T型分子筛膜的通量分别为3.75kg.m-2.h-1和3.45kg.m-2.h-1,分离因子分别为5700和3610。料液浓度和温度对T型分子筛膜的渗透汽化性能也有较大影响。Zeolite T membranes with high pervaporation （PV） performance were synthesized on porous stainless steel （SS）, α-Al2O3 and mullite tubes, respectively, by secondary growth method. The effects of synthesis time, n（SiO：）/n（Al2O3）, n（H2O）/n（Al2O3） ratios and the silicon sources were also investigated on the formation and separation properties of as-synthesized zeolite T membranes. The crystal phases ana morphologies of zeolite T membrane were characterized by X-ray diffraetion（XRD） and scan electron microseope（SEM）. Under optimized synthesis conditions, high quality zeolite T membranes could be reproducibly prepared. The membrane formed on SS tube had a high flux of 5.87kg·m^-2·h^-1 with a high water/i-propanol separation factor of 2 420 toward a feed concentration of 10wt% water at 348 K. On contrast, the fluxes of 3.75kg·m^-2·h^-1 and 3.45kg·m^-2·h^-1 with separation factors of 5 700 and 3 610 were gained through membranes prepared on α-Al2O3 and mullite tubes, respectively. Pervaporation（PV） performances of zeolite T membrane were also influenced greatly by feed concentration and temperature.

关 键 词：T型分子筛膜 支撑体 二次生长 渗透汽化 

分 类 号：O613.72[理学—无机化学] O614.31[理学—化学]