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题名: Synthesis and pervaporation properties of NaA zeolite membranes prepared with vacuum-assisted method
作者: Huang, Aisheng;  Yang, Weishen;  Liu, Jie
通讯作者: 杨维慎
关键词: NaA zeolite membrane ;  in situ hydrothermal synthesis ;  vacuum-assisted ;  pervaporation ;  formation mechanism
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
发表日期: 2007-08-15
DOI: 10.1016/j.seppur.2007.01.020
卷: 56, 期:2, 页:158-167
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 504
产权排名: 2;1
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: Uniform and dense NaA zeolite membranes were synthesized on the tubular alpha-Al2O3 support with a vacuum-assisted method by using low vacuum. The effect of vacuum degree on the formation of the NaA zeolite membrane was investigated. With the assistance of the vacuum, the negative influence of the gravitation force could be effectively reduced. Therefore, the zeolite particles could transport to cover the entire area of the support surface homogeneously, which facilitated formation of uniform and dense zeolite membranes. With the assistance of the vacuum, most zeolite particles migrated to the support surface for membrane formation, and the amount of crystals forming in the liquid phase could be greatly reduced. In addition, zeolite particles could be transported to the support surface rapidly, increasing the rate of dense membrane formation. The pervaporation properties of the as-synthesized zeolite membranes were evaluated by dehydration of 95 wt.% isopropanol/water mixtures at 343 K. The as-synthesized NaA zeolite membrane prepared with the vacuum-assisted method (i.e., with the assistance of 10 mmHg vacuum degrees), showed good pervaporation properties. The separation factor (water/isopropanol) was 3781 and the flux was 1.49 kg/m(2)h, respectively. Based on the observed results, the formation mechanism of zeolite membrane with vacuum-assisted method was discussed. (c) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: TUBULAR SUPPORTS ;  SECONDARY GROWTH ;  A MEMBRANES ;  MIXTURES ;  FILMS ;  SEPARATION ;  ALUMINA ;  SURFACE ;  ZSM-5 ;  WATER
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000248029100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99417
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Huang, Aisheng,Yang, Weishen,Liu, Jie. Synthesis and pervaporation properties of NaA zeolite membranes prepared with vacuum-assisted method[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2007,56(2):158-167.
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