中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Synthesis, oxygen permeation study and membrane performance of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta oxygen-permeable dense ceramic reactor for partial oxidation of methane to syngas
作者: Shao, ZP;  Xiong, GX;  Dong, H;  Yang, WH;  Lin, LW
关键词: Ba0.5Sr0.5Co0.8Fe0.2O3-delta ;  oxygen permeation ;  membrane reactor ;  partial oxidation of methane
刊名: SEPARATION AND PURIFICATION TECHNOLOGY
发表日期: 2001-10-01
卷: 25, 期:1-3, 页:97-116
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) oxide was synthesized by a combined EDTA-citrate complexing method. The partial substitution of Sr in SrCo0.8Fe0.2O3-delta by Ba led to obvious improvement in the phase stability of the material at high temperatures. Under an air/helium oxygen gradient, the oxygen permeation fluxes of BSCFO were considerably high, a permeation flux approximate to1.6 ml/cm(2) min was achieved for a 1.5 mm. membrane at 950 degreesC, when P'(O2) = 0.21 atm and P " (O2) = 0.05 atm. The oxygen permeation was rate-determined mainly by oxygen bulk diffusion under non-reducing environment within the membrane thickness (1.5-1.8 mm) and temperature range (800-900 degreesC) investigated. The oxygen permeation flux kept at 1.1-1.2 ml/cm(2) min under ambient air/helium oxygen gradient during more than 1000 h operation. However, at lower temperatures, the permeation flux slowly decreased in an exponential relationship with time, which was possibly due to the phase decomposition of the material. Two membrane configurations and three cases were investigated for the partial oxidation of methane to syngas in a planar BSCFO reactor with LiLaNiOx/gamma -Al2O3 as the reforming catalyst. The decrease in the distance between membrane surface and the reforming catalyst led to increase in the oxygen permeation fluxes and the role of surface exchange at the reaction membrane side in the oxygen permeation rate determination. High temperature treatment made some catalyst deposit onto the membrane surface, which led to a change of the oxygen exchange mechanism at the reaction side membrane surface, and resulted in an increase in oxygen permeation flux and decrease in activation energy of oxygen surface exchange. The stable long-term performance of the membrane reactor demonstrated that the permeation was still controlled by surface oxygen exchange of the reaction side membrane surface after the high temperature treatment. At 875 degreesC, a permeation flux of 11.5 ml/cm(2) min, methane conversion of 97-98%, and CO selectivity of 95-97% were achieved. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: MIXED-CONDUCTING OXIDES ;  PEROVSKITE MEMBRANES ;  GAS ;  CONVERSION ;  ION ;  CATALYSTS ;  SR
语种: 英语
WOS记录号: WOS:000171837900012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138825
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


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,Xiong, GX,Dong, H,et al. Synthesis, oxygen permeation study and membrane performance of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta oxygen-permeable dense ceramic reactor for partial oxidation of methane to syngas[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2001,25(1-3):97-116.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Shao, ZP]'s Articles
 [Xiong, GX]'s Articles
 [Dong, H]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Shao, ZP]‘s Articles
 [Xiong, GX]‘s Articles
 [Dong, H]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace