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题名: Oxygen permeability and improved stability of a permeable Zr-substituted perovskite membrane for air separation
作者: Lu, Hui;  Cong, You;  Yang, Weishen
通讯作者: 杨维慎
关键词: perovskite ;  oxygen-permeable membrane ;  oxygen permeability ;  stability
刊名: MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
发表日期: 2007-06-25
DOI: 10.1016/j.mseb.2007.05.006
卷: 141, 期:1-2, 页:55-60
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 504
产权排名: 1;1
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
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.
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
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000249566100009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99411
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:
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.
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