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题名: Initiation of oxygen permeation and POM reaction in different mixed conducting ceramic membrane reactors
作者: Tong, Jianhua;  Yang, Weishen;  Suda, Hiroyuki;  Haraya, Kenji
通讯作者: 佟建华
关键词: oxygen permeation ;  POM reaction ;  ceramic membrane reactor
刊名: CATALYSIS TODAY
发表日期: 2006-10-30
DOI: 10.1016/j.cattod.2006.02.089
卷: 118, 期:1-2, 页:144-150
收录类别: ISTP ;  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 ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The initiation of oxygen permeation and POM were studied in mixed conducting ceramic membrane reactors. Membrane material composition, and catalyst-loading mode were proven to have an important effect on the initiation of oxygen permeation and POM reaction. The initiation time for compositions of Ba0.5Sr0.5CO0.8Fe0.2O3-delta (BSCFO) and 13aCo(0.4)Fe(0.4)Zr(0.2)O(3-delta) (BCFZO) are 20 and 2 h, respectively. When the catalyst was loaded directly on the membrane surface the oxygen permeation flux increased 8-10-fold of that under air/He gradient. The good POM performance of the methane conversion, higher than 96% and the CO selectivity, higher than 95%, was achieved successfully. However, when the catalyst was loaded on a place away from the membrane surface or the catalyst was not loaded, the lower oxygen permeation flux (1-2-fold) and the poor POM performance (the methane conversion is lower than 30% and the CO selectivity is lower than 20%) were obtained. The characterization of XRD and SEM-EDS indicated that the initial process might be finished through initiating the catalyst and adjusting the membrane structure (the formation of a thin CoO containing porous layer with a thickness of about 10 mu m). The great increase of oxygen permeation flux can be ascribed to the great decrease of the oxygen partial pressure and the adjustment of the surface structure. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: PEROVSKITE-TYPE OXIDES ;  PARTIAL OXIDATION ;  METHANE ;  SYNGAS ;  STABILITY ;  PERMEABILITY ;  SEPARATION ;  CONVERSION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000241489700021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/97705
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.Natl Inst Adv Ind Sci & Technol, AIST, Res Inst Innovat Sustainable Chem, Membrane Separat Proc Grp, Tsukuba, Ibaraki 3058565, Japan
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Tong, Jianhua,Yang, Weishen,Suda, Hiroyuki,et al. Initiation of oxygen permeation and POM reaction in different mixed conducting ceramic membrane reactors[J]. CATALYSIS TODAY,2006,118(1-2):144-150.
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