Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation

	Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation
	Lu, Hui; Cong, You; Yang, Weishen
刊名	materials science and engineering b-solid state materials for advanced technology
	2007-06-25
卷号	141 期号:1-2 页码:55-60
关键词	perovskite oxygen-permeable membrane oxygen permeability stability
通讯作者	杨维慎
产权排序	1;1
英文摘要	zr-substituted ba0.5sr0.5co0.8fe0.1zr0.1o3-delta (bscfzo) powders for oxygen membrane were synthesized by the solid-state reaction (ssr) method. oxygen permeation fluxes (jo(2)) across the dense ba0.5sr0.5co0.8fe0.2o3-delta (bscfo) and bscfzo membrane disks were measured at 973-1123 k, and they increased as bscfo (synthesized by improved edta-citric acid complexing method, ecc) > bscfo (ssr) > bscfzo. the reduced oxygen permeability of zr-substituting bscfzo material can be attributed primarily to the higher oxidation state of zr cations than ones of iron cations, thus lead to the decrease in the oxygen vacancy concentration in bscfo. oxygen permeation measurements with different oxygen partial pressure gradients and membrane thicknesses demonstrate the bulk oxide ionic diffusion is the rate-limiting step for the bscfzo membrane in the range of temperatures investigated (973-1123 k). the enhanced stability of bscfzo demonstrated by the differential thermal analysis (dta) and high-temperature x-ray diffraction (ht-xrd) characterizations, show that the structural stability can be improved when the fe ions in the b-sites of bscfo materials are substituted partially by zr cations. (c) 2007 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; technology ; physical sciences
类目[WOS]	materials science, multidisciplinary ; physics, condensed matter
研究领域[WOS]	materials science ; physics
关键词[WOS]	partial oxidation ; ba0.5sr0.5co0.8fe0.2o3-delta membrane ; conducting membranes ; ceramic membrane ; high-pressures ; pom reaction ; permeation ; methane ; reactor ; performance
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000249566100009
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/99411]
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, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Lu, Hui,Cong, You,Yang, Weishen. Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation[J]. materials science and engineering b-solid state materials for advanced technology,2007,141(1-2):55-60.
APA	Lu, Hui,Cong, You,&Yang, Weishen.(2007).Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation.materials science and engineering b-solid state materials for advanced technology,141(1-2),55-60.
MLA	Lu, Hui,et al."Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation".materials science and engineering b-solid state materials for advanced technology 141.1-2(2007):55-60.