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题名: Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability
作者: Cong, Y;  Shao, ZP;  Yang, WS;  Xiong, GX;  Lin, LW
关键词: perovskite ;  Ga2O3 ;  oxygen separation membrane ;  La0.15Sr0.85Ga0.3Fe0.7O3-delta ;  La0.15Sr0.85Co0.3Fe0.7O3-delta
刊名: SCIENCE IN CHINA SERIES B-CHEMISTRY
发表日期: 2001-06-01
卷: 44, 期:3, 页:294-303
收录类别: SCI
文章类型: Article
部门归属: 5110
项目归属: 504
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: La0.15Sr0.85Ga0.3Fe0.7O3-delta (LSGFO) and La0.15Sr0.85Co0.3Fe0.7O3-delta (LSCFO) mixed oxygen-ion and electron conducting oxides were synthesized by using a combined EDTA and citrate complexing method, and the corresponding dense membranes were fabricated. The properties of the oxide powders and membranes were characterized with combined SEM, XRD, H-2-TPR, O-2-TPD techniques, mechanical strength and oxygen permeation measurement. The results showed that LSGFO had much higher thermochemical stability than LSCFO due to the higher valence stability of Ga3+. After the temperature-programmed reduction by 5% H-2 in Ar from 20 degreesC to 1020 degreesC, the basic perovskite structure of LSGFO was successfully preserved. LSGFO also favors the oxygen vacancy formation better than LSCFO. Oxygen permeation measurement demonstrated that LSGFO had higher oxygen permeation flux than LSCFO, but they had similar activation energy for oxygen transportation, with a value of 110 and 117 kJ . mol(-1), respectively The difference in oxygen permeation fluxes was correlated with the difference in oxygen vacancy concentrations for the two materials.
关键词[WOS]: OXIDES ;  GAS ;  CONVERSION ;  METHANE ;  SYNGAS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000169765500008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85861
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:
Cong, Y,Shao, ZP,Yang, WS,et al. Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,2001,44(3):294-303.
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