| 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 | |
| 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。 | |
| 关键词: T型分子筛膜 支撑体 二次生长 渗透汽化 | |
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| Abstract: 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(SiO2)/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 and morphologies of zeolite T membrane were characterized by X-ray diffraction(XRD) and scan electron microscope(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 5.87 kg·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 3.75 kg·m-2·h-1 and 3.45 kg·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. | |
| Keywords: zeolite T membrane support secondary growth pervaporation | |
| 摘要点击次数: 1381 | |
| 全文下载次数: 1956 | |
| 周荣飞,胡 娜,袁 慧,朱美华,王振卓,陈祥树.T型分子筛膜的合成、表征与渗透汽化性能[J].无机化学学报,2009,25(8):1439-1446. | |
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