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题名: Synthesis and perfection evaluation of NaA zeolite membrane
作者: Xu, XC;  Yang, WS;  Liu, J;  Lin, LW
关键词: clear solution ;  gas permeation ;  hydrothermal synthesis ;  NaA zeolite membrane ;  perfection evaluation
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
发表日期: 2001-10-01
卷: 25, 期:1-3, 页:475-485
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 5107
项目归属: 504
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: The synthesis of NaA zeolite membrane on a porous alpha -Al2O3 support from clear solution and the evaluation of the perfection of the as-synthesized membrane by gas permeation were investigated. When an unseeded support was used, the NaA zeolite began to transform into other types of zeolites before a continuous NaA zeolite membrane formed. When the support was coated with nucleation seeds, not only the formation of NaA zeolite on the support surface was accelerated, but also the transformation of NaA zeolite into other types of zeolites was inhibited. A continuous NaA zeolite membrane can be formed. Perfection evaluation indicated that the NaA zeolite membrane with the synthesis time of 3 h showed the best perfection after a one-stage synthesis. The perfection of NaA zeolite membrane can be improved by employing the multi-stage synthesis method. The NaA zeolite membrane with a synthesis time of 2 h after a two-stage synthesis showed the best gas permeation performance, The permselectivity of H-2/n-C4H10 and O-2/N-2 were 19.1 and 1.8, respectively, higher than those of the corresponding Knudsen diffusion selectivity of 5.39 and 0.94, which showed the molecular sieving effect of NaA zeolite. However, the permeation of n-C4H10 also indicated that the NaA zeolite membrane had certain defects, the diameter of which were larger than the NaA zeolite channels. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: GAS PERMEATION PROPERTIES ;  COMPOSITE MEMBRANES ;  MFI MEMBRANES ;  SEPARATION ;  MIXTURES ;  PERVAPORATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000171837900052
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85859
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Xu, XC,Yang, WS,Liu, J,et al. Synthesis and perfection evaluation of NaA zeolite membrane[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2001,25(1-3):475-485.
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