Synthesis and pervaporation performance of highly reproducible zeolite T membranes from clear solutions

doi:10.1016/S1872-2067(11)60478-6

Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (3): 542-547.DOI: 10.1016/S1872-2067(11)60478-6

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Synthesis and pervaporation performance of highly reproducible zeolite T membranes from clear solutions

ZHANG Xiaoliang, SONG Xin, QIU Lingfang, DING Minzheng, HU Na, ZHOU Rongfei,CHEN Xiangshu

Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China

Received:2012-09-05 Revised:2012-10-12 Online:2013-04-02 Published:2013-04-03
Supported by:
This work was supported by the National Natural Science Foundation of China (20966003, 21106059), the National High Technology Research and Development Program of China (863 Program, 2012AA03A609), Jiangxi Provincial Department of Science and Technology (2010BGA01200, 2010GQH0068, 20122BAB203018), and Jiangxi Provincial Department of Education (GJJ11377).

Abstract

Abstract:

Zeolite T membranes with very good permeation performance were successfully synthesized on porous mullite supports by the secondary growth method with homemade microsized seeds from clear solutions. The influence of synthesis parameters such as the molar ratios of SiO₂/Al₂O₃ and H₂O/SiO₂, alkalinity, synthesis temperature, and crystallization time on membrane growth and permeation performance was investigated systematically. It is found that these parameters strongly affect the zeolite T growth and pervaporation performance of the membranes. Under the optimized synthesis conditions of 1SiO₂:0.015Al₂O₃:0.41(Na₂O+K₂O):30H₂O, the crystallization time was shortened to 6 h at 423 K and a continuous and dense T-type zeolite layer as thin as 5 μm formed on the surface of the support. It significantly improved the membrane density and permselective properties. A permeation flux and separation factor of 4.20 kg/(m²·h) and 7800, respectively, were obtained with the as-synthesized membrane for 10 wt% water-90 wt% #em/em#-propanol mixtures at 348 K. It also exhibited a very good pervaporation performance for water/ethanol mixtures separation. This high quality zeolite T membrane could be reproducibly prepared.

Key words: Zeolite T membrane, Reproducibility, Clear solution, Secondary growth, Pervaporation

ZHANG Xiaoliang, SONG Xin, QIU Lingfang, DING Minzheng, HU Na, ZHOU Rongfei,CHEN Xiangshu. Synthesis and pervaporation performance of highly reproducible zeolite T membranes from clear solutions[J]. Chinese Journal of Catalysis, 2013, 34(3): 542-547.

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Synthesis and pervaporation performance of highly reproducible zeolite T membranes from clear solutions

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