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清液体系高性能T型分子筛膜的制备及表征

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Indexed by:期刊论文

Date of Publication:2016-07-20

Journal:无机材料学报

Included Journals:SCIE、EI、PKU、ISTIC、CSCD

Volume:31

Issue:7

Page Number:705-710

ISSN No.:1000-324X

Key Words:T型沸石分子筛膜;变温热浸渍法;二次生长法;渗透汽化

Abstract:采用二次生长法,在廉价大孔α-Al2O3管状载体上通过变温热浸渍涂晶法获得连续致密的晶种层,在摩尔配比为1SiO2:0.05Al2O3:0.26Na2O:0.09K2O:30H2O清液体系中120℃水热晶化16 h成功制备出T型分子筛膜。实验考察了小晶种液浓度,晶化时间对T型沸石分子筛膜的形貌和性能的影响。XRD和SEM结果表明,晶化过程中晶种的外延生长和新的晶核成核过程同时进行,晶种的外延生长和新核的诱导作用产生协同作用,缩短 T 型沸石膜的生长时间。将制备的T型沸石分子筛膜用于75℃渗透汽化分离10wt%水/异丙醇体系,其渗透通量和分离系数分别达到2.96 kg/(m2·h)和6400。

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