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题名: Oxygen permeability and structural stability of BaCe0.15Fe0.85O3-delta membranes
作者: Zhu, Xuefeng;  Cong, You;  Yang, Weishen
关键词: oxygen separation ;  ceramic membrane ;  perovskite ;  mixed conductor ;  structural stability
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2006-10-20
DOI: 10.1016/j.memsci.2006.06.010
卷: 283, 期:1-2, 页:38-44
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: Cobalt-free BaCexFe1-xO3-delta (x = 0.15-0.85) membranes have both high oxygen permeation flux and high structure stability even in reducing atmosphere at high temperature. The oxygen flux of BaCe0.15Fe0.85O3-delta (BCF1585) membrane reached at 0.5 ml/min cm(2) at 900 degrees C with a thickness of 1.4 mm. Oxygen permeation results showed that oxygen permeation controlling step mainly was oxygen ion diffusion in the membrane bulk if the membrane thicker than 1.0 mm, and mainly was surface oxygen exchange if the membrane thinner than 0.78 mm. Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) porous layer coated on the membrane surfaces could effectively accelerate the surface oxygen exchange rate, thus greatly improve the oxygen permeability of the membrane. In some cases, the oxygen permeation flux of the membrane coated with BSCF was even two times higher than that of the membrane without coating. Perovskite structure of BCF1585 was still maintained at 950 degrees C even after it was exposed to 5% H-2 + Ar mixture gas for 1 h. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: PEROVSKITE-TYPE OXIDES ;  DENSE CERAMIC MEMBRANES ;  PARTIAL OXIDATION ;  METHANE CONVERSION ;  IONIC-CONDUCTIVITY ;  PERMEATION ;  SYNGAS ;  REACTOR ;  FE ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000240844900007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140347
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
2.Chinese Acad Sci, Grad Sch, Dalian 116023, Peoples R China

Recommended Citation:
Zhu, Xuefeng,Cong, You,Yang, Weishen. Oxygen permeability and structural stability of BaCe0.15Fe0.85O3-delta membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2006,283(1-2):38-44.
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