Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation

doi:10.1016/j.seppur.2017.04.035

	Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation
	Yu, Jiafeng; Zhang, Jixin; Bao, Chun; Li, Hui; Xu, Hengyong; Sun, Jian
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2017-08-31
卷号	184 页码:43-53
关键词	Pd Membrane Defects Reparation Zeolites Hydrogen Separation
DOI	10.1016/j.seppur.2017.04.035
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.
语种	英语
WOS记录号	WOS:000403730500005
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152121]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, Dalian, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Yu, Jiafeng,Zhang, Jixin,Bao, Chun,Li, Hui,Xu, Hengyong,&Sun, Jian.(2017).Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation.SEPARATION AND PURIFICATION TECHNOLOGY,184,43-53.
MLA	Yu, Jiafeng,et al."Confined and in-situ zeolite synthesis: A novel strategy for defect reparation over dense Pd membranes for hydrogen separation".SEPARATION AND PURIFICATION TECHNOLOGY 184(2017):43-53.