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Relationship between homogeneity and oxygen permeability of composite membranes
Zhu, Xuefeng; Wang, Haihui; Yang, Weishen; Yang WS(杨维慎); Yang WS(杨维慎)
关键词Homogeneity Oxygen Permeability Composite Membrane Ceria
刊名JOURNAL OF MEMBRANE SCIENCE
2008-02-15
DOI10.1016/j.memsci.2007.10.01
309期:1-2页:120-127
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
关键词[WOS]LAGAO3 PEROVSKITE OXIDE ; PARTIAL OXIDATION ; CERAMIC MEMBRANE ; PERMEATING PROPERTY ; METHANE ; SYNGAS ; TRANSPORT ; REACTORS ; CONDUCTIVITY ; PERFORMANCE
英文摘要Oxygen permeable composite ceramic membrane of 75 wt.% Ce(0.8)G(0.2)O(1.9) wt.% Gd0.2Sr0.8FeO3-delta (GDC-GSF) was investigated to understand the relationship between homogeneity and oxygen permeability. Four different methods were employed for its preparation, i.e. (1) mixing powders method, (2) packing method, (3) loading method and (4) one pot method. Structures and reactions between the two oxides were investigated by X-ray diffraction (XRD), backscattered electron microscope (BSEM) and local areas energy-dispersive X-ray spectra (EDXS) analysis. XRD results showed that it was compatible between the fluorite phase and the perovskite phase in the composite membranes synthesized by all the methods. BSEM results revealed that different preparation methods would lead to different homogeneity of two phases in composite membranes and the membrane derived from one pot method showed the most uniform mixture of the fluorite phase and perovskite phase. The local areas EDXS analysis showed minor inter-diffusion of elements between GDC and GSF. Oxygen permeation measurements indicated that the inter-diffusion has little effects on the oxygen permeability and showed that a more uniform of the microstructure would result in higher oxygen permeability. The concept of three-phase boundaries (TPB) was proposed to understand the oxygen exchange reactions on membrane surfaces. TPB concept and the block of fluorite grains on electrons transport between perovskite grains was used to explain the relationship between the homogeneity and the oxygen permeability of composite membranes. (C) 2007 Elsevier B.V. All rights reserved.
语种英语
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WOS记录号WOS:000252813000014
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被引频次:42[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/101029
专题中国科学院大连化学物理研究所
通讯作者Yang WS(杨维慎); Yang WS(杨维慎)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Beijing 100864, Peoples R China
推荐引用方式
GB/T 7714
Zhu, Xuefeng,Wang, Haihui,Yang, Weishen,et al. Relationship between homogeneity and oxygen permeability of composite membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2008,309(1-2):120-127.
APA Zhu, Xuefeng,Wang, Haihui,Yang, Weishen,杨维慎,&杨维慎.(2008).Relationship between homogeneity and oxygen permeability of composite membranes.JOURNAL OF MEMBRANE SCIENCE,309(1-2),120-127.
MLA Zhu, Xuefeng,et al."Relationship between homogeneity and oxygen permeability of composite membranes".JOURNAL OF MEMBRANE SCIENCE 309.1-2(2008):120-127.
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