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题名: Partial oxidation of methane in Ba0.5Sr0.5Co0.8Fe0.2O3-delta membrane reactor at high pressures
作者: Lu, H;  Tong, JH;  Cong, Y;  Yang, WS
关键词: mixed-conducting ceramic membrane ;  POM ;  oxygen separation ;  membrane reactor ;  perovskite
刊名: CATALYSIS TODAY
发表日期: 2005-06-30
DOI: 10.1016/j.cattod.2005.03.078
卷: 104, 期:2-4, 页:154-159
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: Oxygen permeation fluxes through dense disk-shaped Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) membranes were investigated as a function of temperature (973-1123 K), pressure (2-10 atm), and membrane thickness (1-2 mm) under an air/helium gradient. A high oxygen permeation flux of 2.01 ml/cm(2) min was achieved at 1123 K and 10 atm under an air/He oxygen partial pressure gradient. Based on the dependence of the oxygen permeation flux on the oxygen partial pressure difference across the membrane and the membrane thickness, it is assumed that bulk diffusion of oxygen ions was the rate-controlling step in the oxygen transport across the BSCFO membrane disk under an air/He gradient. The partial oxidation of methane (POM) to syngas using LiLaNiOx/gamma-Al2O3 as catalyst in a BSCFO membrane reactor was successfully performed at high pressure (5 atm). Ninety-two percent methane conversion, 90% CO selectivity, and 15.5 ml/cm(2) min oxygen permeation flux were achieved in steady state at a temperature of 1123 K and a pressure of 5 atm. A syngas production rate of similar to 79 ml/cm(2) min was obtained. Characterization of the membrane surface by SEM and XRD after reaction showed that the surface exposed to the air side preserved the Perovskite structure while the surface exposed to the reaction side was eroded. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: PEROVSKITE-TYPE OXIDES ;  OXYGEN PERMEABILITY ;  CERAMIC MEMBRANES ;  SYNGAS ;  CONVERSION ;  PERMEATION ;  DIFFUSION ;  GAS
语种: 英语
WOS记录号: WOS:000230204100009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139871
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:
Lu, H,Tong, JH,Cong, Y,et al. Partial oxidation of methane in Ba0.5Sr0.5Co0.8Fe0.2O3-delta membrane reactor at high pressures[J]. CATALYSIS TODAY,2005,104(2-4):154-159.
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