Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion

	Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion
	Shao, ZP; Dong, H; Xiong, GX; Gong, Y; Yang, WS
刊名	journal of membrane science
	2001-03-01
卷号	183 期号:2 页码:181-192
关键词	Ba0.5Sr0.5Co0.8Fe0.2O3-delta perovskite membrane reactor oxidative coupling of methane partial oxidation of methane oxygen permeation
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.
WOS标题词	science & technology ; technology ; physical sciences
类目[WOS]	engineering, chemical ; polymer science
研究领域[WOS]	engineering ; polymer science
关键词[WOS]	nickel-based catalysts ; alkali-metal oxide ; partial oxidation ; synthesis gas ; syngas ; permeation ; transformation ; ion
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000167223900004
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/85863]
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	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Shao, ZP,Dong, H,Xiong, GX,Gong, Y,&Yang, WS.(2001).Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion.journal of membrane science,183(2),181-192.
MLA	Shao, ZP,et al."Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion".journal of membrane science 183.2(2001):181-192.