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题名: Oxidative coupling of methane in Ba0.5Sr0.5Co0.8Fe0.2O3-delta tubular membrane reactors
作者: Wang, HH;  Cong, Y;  Yang, WS
关键词: membrane reactor ;  OCM ;  oxygen separation ;  methane conversion ;  perovskite
刊名: CATALYSIS TODAY
发表日期: 2005-06-30
DOI: 10.1016/j.cattod.2005.03.079
卷: 104, 期:2-4, 页:160-167
收录类别: ISTP ;  SCI
文章类型: Article
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: A dense membrane tube made of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) was prepared by plastic extrusion from BSCF oxide synthesized by the complexing EDTA-citrate method. The membrane tube was used in a catalytic membrane reactor for oxidative coupling of methane (OCM) to C-2 without an additional catalyst. At high methane concentration (93%), about 62% C-2 selectivity was obtained, which is higher than that achieved in a conventional reactor using the BSCF as a catalyst. The dependence of the OCM reaction on temperature and methane concentration indicates that the C-2 selectivity in the BSCF membrane reactor is limited by high ion recombination rates. If an active OCM catalyst (La-Sr/CaO) was packed in the membrane tube, C-2 selectivity and CH4 conversion increased compared to the blank run. The highest C-2 yield in the BSCF membrane reactor in presence of the La-Sr/CaO catalyst was about 15%, similar to that in a packed-bed reactor with the same catalyst under-the same conditions. However, the ratio Of C2H4/C2H6 in the membrane reactor was much higher than that in the packed-bed reactor, which is an advantage of the membrane reactor. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: CONDUCTING CERAMIC MEMBRANE ;  OXYGEN-PERMEABLE MEMBRANE ;  DOPED BISMUTH OXIDE ;  CATALYTIC-PROPERTIES ;  PERMEATION ;  CONVERSION ;  TRANSIENT ;  STABILITY ;  SYNGAS ;  MGO
语种: 英语
WOS记录号: WOS:000230204100010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139858
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.Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

Recommended Citation:
Wang, HH,Cong, Y,Yang, WS. Oxidative coupling of methane in Ba0.5Sr0.5Co0.8Fe0.2O3-delta tubular membrane reactors[J]. CATALYSIS TODAY,2005,104(2-4):160-167.
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