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题名: Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion
作者: Shao, ZP;  Dong, H;  Xiong, GX;  Gong, Y;  Yang, WS
关键词: Ba0.5Sr0.5Co0.8Fe0.2O3-delta ;  perovskite ;  membrane reactor ;  oxidative coupling of methane ;  partial oxidation of methane ;  oxygen permeation
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2001-03-01
卷: 183, 期:2, 页:181-192
收录类别: SCI
文章类型: Article
部门归属: 5099
项目归属: 504
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: A mixed-conducting perovskite-type Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) ceramic membrane reactor with high oxygen permeability was applied for the activation of methane. The membrane reactor has intrinsic catalytic activities for methane conversion to ethane and ethylene. C-2 selectivity up to 40-70% was achieved, albeit that conversion rate were low, typically 0.5-3.5% at 800-900 degreesC with a 50% helium diluted methane inlet stream at a flow rate of 34 ml/min. Large amount of unreacted molecular oxygen was detected in the eluted gas and the oxygen permeation flux improved only slightly compared with that under non-reactive air/He experiments. The partial oxidation of methane to syngas in a BSCFO membrane reactor was also performed by packing LiLaNiO/gamma -Al2O3 with 10% Ni loading as the catalyst. At the initial stage, oxygen permeation flux, methane conversion and CO selectivity were closely related with the state of the catalyst. Less than 21 h was needed for the oxygen permeation flux to reach its steady state. 98.5% CH4 conversion, 93.0% CO selectivity and 10.45 ml/cm(2) min oxygen permeation flux were achieved under steady state at 850 degreesC. Methane conversion and oxygen permeation flux increased with increasing temperature, No fracture of the membrane reactor was observed during syngas production. However, H-2-TPR investigation demonstrated that the BSCFO was unstable under reducing atmosphere, yet the material was found to have excellent phase reversibility. A membrane reactor made from BSCFO was successfully operated for the POM reaction at 875 degreesC for more than 500h without failure, with a stable oxygen permeation flux of about 11.5 ml/cm(2) min. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: NICKEL-BASED CATALYSTS ;  ALKALI-METAL OXIDE ;  PARTIAL OXIDATION ;  SYNTHESIS GAS ;  SYNGAS ;  PERMEATION ;  TRANSFORMATION ;  ION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000167223900004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85863
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:
Shao, ZP,Dong, H,Xiong, GX,et al. Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion[J]. JOURNAL OF MEMBRANE SCIENCE,2001,183(2):181-192.
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