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题名: Investigation on POM reaction in a new perovskite membrane reactor
作者: Dong, H;  Shao, ZP;  Xiong, GX;  Tong, JH;  Sheng, SS;  Yang, WS
关键词: Ba0.5Sr0.5Co0.8Fe0.2O3-delta ;  perovskite ;  membrane reactor ;  partial oxidation of methane
刊名: CATALYSIS TODAY
发表日期: 2001-05-15
卷: 67, 期:1-3, 页:3-13
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 perovskite-type oxide of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) shows mixed (electronic/oxygen ionic) conductivity at high temperatures. Membrane made of the oxide has high oxygen permeability under air/helium oxygen partial pressure gradient. At 850 degreesC, oxygen permeation rate maintained about 1.15 ml/cm(2) min for more than 1000 h under ambient air/helium oxygen gradient. A membrane reactor constructed from the oxide membrane was applied for the partial oxidation of methane (POM) to syngas, LiLaNiOx/gamma -Al2O3 with 10 wt.% Ni loading was used as the packed catalyst. At the initial stage, oxygen permeation rate, methane conversion and CO selectivity were closely related with the state of the catalyst. Less than 21 h was needed for the oxygen permeation rate to reach its steady state. A membrane reactor made of BSCFO was successfully operated for POM reaction at 875 degreesC for about 500 h without failure, with methane conversion of > 97%, CO selectivity of > 95% and oxygen permeation rate of about 11.5 ml/cm(2) min. Under membrane reaction condition, the POM reaction mechanism was suggested to obey the CRR (complete combustion of CH4 to CO2 and H2O and a subsequent reforming reaction of the residual CH4 and with CO2 and H2O to CO and H-2) mechanism. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: PARTIAL OXIDATION ;  CERAMIC MEMBRANES ;  OXYGEN PERMEATION ;  DENSE PEROVSKITE ;  SYNTHESIS GAS ;  METHANE ;  SYNGAS ;  CATALYSTS ;  NI/AL2O3 ;  OXIDE
语种: 英语
WOS记录号: WOS:000169442300002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138887
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:
Dong, H,Shao, ZP,Xiong, GX,et al. Investigation on POM reaction in a new perovskite membrane reactor[J]. CATALYSIS TODAY,2001,67(1-3):3-13.
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