OALib Journal期刊
ISSN: 2333-9721
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清液体系中T型分子筛膜的高重复性合成与渗透汽化性能
DOI: 10.1016/S1872-2067(11)60478-6, PP. 542-547
Keywords: T型分子筛膜,重复性,清液,二次生长法,渗透汽化
Abstract:
?以自制微米级分子筛为晶种,在清液体系中成功合成出高性能的T型分子筛膜,考察了硅铝比、水硅比、碱度及合成温度与时间等条件对膜的生长和渗透汽化性能的影响.结果表明,在摩尔组成为1SiO2:0.015Al2O3:0.41(Na2O+K2O):30H2O的清液体系中,于423K晶化6h的条件下可较快地形成一层厚度为5μm的连续致密纯相T型分子筛膜,较大缩短了膜合成时间且提高了膜致密性.在优化条件下所合成的膜具有优良的分离性能和高重复性.348K时,在10wt%水-90wt%异丙醇混合物体系中膜的渗透通量和分离因子分别高达4.20kg/(m2·h)和7800.
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