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题名: Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation
作者: Yu, Jiafeng1;  Zhang, Jixin1;  Bao, Chun1;  Li, Hui1;  Xu, Hengyong1;  Sun, Jian1
关键词: Pd membrane ;  Defects ;  Reparation ;  Zeolites ;  Hydrogen separation
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
发表日期: 2017-08-31
DOI: 10.1016/j.seppur.2017.04.035
卷: 184, 页:43-53
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: The manufacturing of ultrathin Pd based hydrogen separation membranes with high permeation performance has great potential in industrial applications. However, there usually exists a trade-off between reduced thickness and high hydrogen permselectivity which are regarded as a pair of contradictory requirements. In this study, a novel technique of confined and in-situ zeolite synthesis for defects reparation is proposed to improve the hydrogen permselectivity of preformed Pd membranes without further increasing their thickness. Two technology routes are developed for different defect dimensions. Zeolites can only grow inside large defects in one route, which is suitable for repairing broken membranes. In the other route, a thin zeolite layer is formed on Pd membrane surface, covering small defects for further enhancing selectivity. The purity of permeate hydrogen is enhanced from 99.884 to 99.994% after zeolite reparation. High purity hydrogen (99.986%) can be separated from 75% H-2/N-2 mixture with a hydrogen recovery of 91% by the repaired membrane at 500 degrees C and 0.4 MPa. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: POROUS STAINLESS-STEEL ;  EFFECTIVE DIFFUSION BARRIER ;  MASS-FLOW RESISTANCE ;  PALLADIUM MEMBRANES ;  COMPOSITE MEMBRANES ;  NAA ZEOLITE ;  PORE-SIZE ;  THIN ;  FABRICATION ;  SUPPORT
语种: 英语
WOS记录号: WOS:000403730500005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152121
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, Dalian, Peoples R China

Recommended Citation:
Yu, Jiafeng,Zhang, Jixin,Bao, Chun,et al. Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2017,184:43-53.
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