Oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.2O3-delta as an oxygen-permeable membrane at high pressures
文献类型：期刊论文
| 作者 | Lu, H; Cong, Y; Yang, WS |
| 刊名 | solid state ionics
 |
| 出版日期 | 2006-02-01 |
| 卷号 | 177期号:5-6页码:595-600 |
| 关键词 | membrane oxygen permeability diffusion coefficients ionic conductivity stability |
| 英文摘要 | oxygen permeation fluxes across the dense ba0.5sr0.5co0.8fe0.2o3-delta, (bscfo) membrane disks were measured under an air/helium oxygen partial pressure gradient at high pressures (up to 10 atm) and various temperatures (973-1123 k). the fabricated bscfo membrane exhibited good oxygen permeability with a high oxygen permeation flux of 2.01 ml min(-1)cm(-2) (thickness: 1.37 mm) at 1123 k and 10 atm. oxygen permeation results were analyzed theoretically using the surface exchange current model. the dependences of the oxygen permeation fluxes on the oxygen partial pressure gradient, suggested that the bulk oxygen ionic diffusion was the rate-limiting step for the overall oxygen permeation process across the bscfo membrane. the ambipolar diffusion coefficients (d-a), the oxygen vacancy diffusion coefficients (d-a) and the oxygen ionic conductivities (sigma(i)) of the bscfo material at different temperatures (973-1123 k) were calculated. it was found that bscfo possessed high oxygen diffusion coefficients and ionic conductivities, which resulted in the good oxygen permeability of bscfo. in addition, the bscfo membrane exhibited good stability of oxygen permeation at 1123 k, while the deterioration of oxygen permeation stability was observed at 1098 k due to structural changes occurring at the surface of the bscfo membrane disk as demonstrated by xrd. (c) 2005 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical ; physics, condensed matter |
| 研究领域[WOS] | chemistry ; physics |
| 关键词[WOS] | perovskite-type oxides ; partial oxidation ; conducting membranes ; permeation ; methane ; transport ; reactor ; syngas ; conversion ; diffusion |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000236301000024 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140182]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Sci & Technol Lille, Ecole Natl Super Chim Lille, CNRS, UMR 8012,Lab Cristallochim & Physiochim Solide, F-59652 Villeneuve Dascq, France |
| 推荐引用方式 GB/T 7714 | Lu, H,Cong, Y,Yang, WS. Oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.2O3-delta as an oxygen-permeable membrane at high pressures[J]. solid state ionics,2006,177(5-6):595-600. |
| APA | Lu, H,Cong, Y,&Yang, WS.(2006).Oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.2O3-delta as an oxygen-permeable membrane at high pressures.solid state ionics,177(5-6),595-600. |
| MLA | Lu, H,et al."Oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.2O3-delta as an oxygen-permeable membrane at high pressures".solid state ionics 177.5-6(2006):595-600. |
入库方式： OAI收割
来源：大连化学物理研究所
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