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The application of hydrophilic zeolite membranes in isopropanol dehydration and the acid resistance study

Authors： JIN Ge1, ZHOU Zhihui1, LIU Hong1, WU Jianxiong1, GUO Dapeng1, WANG Jinqu2

Units： Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgical Mineral Resources，Wuhan University of Science and Technology，Wuhan Hubei 430081，China；2. State Key Laboratory of Fine Chemicals，Dalian University of Technology，Dalian Liaoning 116023，China

KeyWords： hydrophilic zeolite membranes; pervaporation; acid resistance; isopropanol dehydration;

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014,34(6):77-83

Abstract：

In this paper, hydrophilic NaA, T-type and ZSM-5 zeolite membranes on α-Al2O3 tubular supports were prepared by the secondary growth method and characterized by means of SEM. The pervaporation performance of membranes was compared using isopropanol/water mixture at different feed temperatures. The pervaporation performance of ZSM-5 membranes was improved by optimizing the synthesis conditions, such as the molar ratio of Si/Al and F-/Si in the synthesis solution, the crystallization time. The acid resistance of the membranes was investigated and the results indicate that ZSM-5 zeolite membranes have good acid resistance. The ZSM-5 zeolite membrane was characterized using an 97 wt.% ethyl acetate/water system after soaking in acidic solution of pH=5.8 for 10 days; the permeate water content is 99.59 wt.%, permeate flux could reach 0.12 kg·m-2·h-1 and the separation factor could reach to 7894.

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AuthorIntro：

金鸽（1989—），女，湖北随州人，硕士生。

Reference：

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