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Synthesis and characterization of NaA zeolite membrane prepared by different pre-seeding methods

Authors： GE Congcong, ZHANG Donghui, YIN Chunbiao

Units： Chemical Engineering Research Center，State Key Laboratory of Chemical Engineering，School of Chemical Engineering and Technology，Tianjin University，Tianjin 300072，China

KeyWords： pre-seeding method; NaA zeolite membrane; hydrothermal crystallization; pervaporation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2013,33(4):73-77

Abstract：

NaA zeolite membranes were hydrothermally prepared by various pre-seeding methods on the outer surface of porous tubular support. The apparent morphology and dehydration performance of the as-sythesized membrane were characterized by X-ray diffraction（XRD）,field emission scanning electron microscopy (FE-SEM) and pervaporation. High-quality membrane was hydrothermally synthesized twice for 4h with support seeded with NaA zeolite by the combination of rubbing and dipping, which showed a permeation flux of 1.40 kg/(m2•h) and separation factor of 6824 for 90:10(mass) EtOH/H2O mixture at 343K. The effect of operating temperature and feed concentration on pervaporation performance were also studied. The results show that with feed water concentration rising, the permeation flux declines while the separation factor increases initially then declines. When increasing the operating temperature, the separation factor declines slightly while the permeation flux increases.

Funds：

天津市科技支撑计划（2009F3-0005）.

AuthorIntro：

葛聪聪（1988—??），女，硕士研究生通讯作者：张东辉，donghuizhang@tju.edu.cn

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