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学科主题: 物理化学
题名: Design and experimental investigation of oxide ceramic dual-phase membranes
作者: Zhu, Xuefeng1;  Li, Mingrun1;  Liu, Huanying1;  Zhang, Tianyu1;  Cong, You1;  Yang, Weishen1
通讯作者: 朱雪峰 ;  杨维慎
关键词: Oxygen permeation ;  Dual-phase membrane ;  Perovskite ;  Fluorite
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2012-03-15
DOI: 10.1016/j.memsci.2011.12.027
卷: 394, 页:120-130
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]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: The design of oxide ceramic dual-phase membranes is discussed in detail from the point of view of solid state chemistry. Dual-phase membranes with high performance have been designed by considering the permeability, stability and compatibility of the dual-phase system. It is deduced that dual-phase membranes made of Fe-based perovskite oxides (such as Sm0.6Sr0.4FeO3, mixed conductors) and Ce-based fluorite oxides (such as Ce0.85Sm0.15O1.925, ionic conductors) have both good permeability and stability. A dual-phase membrane made of an ionic conductor and pure electronic conductor was studied for comparison purposes, with a nominal composition of 75 wt.% Ce0.85Sm0.15O1.925-25 wt.% Sm0.6Sr0.4CrO3. Experimental investigation of selected membranes is reported with attention to processing, microstructures, conductivity and oxygen permeation properties. Microstructure effects of dual-phase membranes on oxygen exchange reactions and bulk oxide ionic transport were investigated by AC impedance spectroscopy, high resolution transmission electron microscopy and oxygen permeation. Oxygen permeation experiments revealed when the Fe-based mixed conducting perovskite is used in dual-phase membranes, higher oxygen permeation fluxes were achieved than that of the Cr-based pure electronic conducting perovskite was used in the dual-phase membrane. The phenomenon can be well explained by the mutual blocking of electronic and ionic transport by pure electronic conductors and ionic conductors, and the enrichments of Cr-based impurities between the ionic conducting grains. Membranes with various weight ratios of the two phases were synthesized to find the optimal composition. 75 wt.% Ce0.85Sm0.15O1.925-25 wt.% Sm0.6Sr0.4FeO3 was found to be the best membrane from the point of view of both oxygen permeability and stability. The idea of designing dual-phase membranes was verified by the comparison. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: OXYGEN PERMEABLE MEMBRANES ;  HOLLOW-FIBER MEMBRANES ;  PEROVSKITE-TYPE OXIDE ;  COMPOSITE MEMBRANES ;  INTERMEDIATE TEMPERATURES ;  PERMEATION PROPERTIES ;  STRUCTURAL STABILITY ;  PARTIAL OXIDATION ;  AIR SEPARATION ;  DOPED CERIA
语种: 英语
WOS记录号: WOS:000300935300010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118218
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:
Zhu, Xuefeng,Li, Mingrun,Liu, Huanying,et al. Design and experimental investigation of oxide ceramic dual-phase membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2012,394:120-130.
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