DICP OpenIR
Study on oxidative coupling of methane in oxygen permeable tubular membrane reactor
Wang, HH; Cong, Y; Yang, WS; Lin, LW
KeywordPerovskite Oxygen Separation Membrane Methane Oxidative Coupling Membrane Reactor
Source PublicationCHINESE JOURNAL OF CATALYSIS
2003-03-01
Volume24Issue:3Pages:169-174
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordDOPED BISMUTH OXIDE ; CATALYSTS ; CONVERSION ; TRANSIENT ; MGO
AbstractMixed-conducting oxygen permeable membrane is a kind of ceramic membrane, which exhibits both electronic and oxygen ionic conductivity. At high temperature, oxygen can permeate through the membrane in the form of oxygen ions. So on the membrane surface, there are many oxygen species (O-, O-2(-), O-2(2-) and O-2(-)), which can improve C-2 selectivity of oxidative coupling of methane (OCM). A dense tubular membrane made of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) was prepared by the plastic extrusion method. OCM was investigated in the tubular membrane reactor. C-2 production rate in the BSCFO membrane reactor is much higher than that in La0.6Sr0.4Co0.8Fe0.2O3-delta ( LSCFO) and La-Ba-Co-Fe-O (LBCFO) membrane reactors. The reason is that the vacancy concentration in the BSCFO is higher than that in the LSCFO and LBCFO. The higher vacancy concentration not only accelerates the diffusion rate of oxygen ion but also increases the activation rate of methane. So the BSCFO is more active for OCM than the LSCFO and LBCFO. The C-2 production rate increases with the increase of temperature and methane concentration in the feed. However, the C-2 selectivity is determined by the competitive result of oxygen ion recombination and OCM reaction. High rate of oxygen ion recombination will decrease the C-2 selectivity. The methane conversion increases while C-2 selectivity decreases with the increase of oxygen partial pressure in the oxygen-rich side. This result indicates that the gas-phase reaction plays an important role in the OCM reaction. There is a large amount of O-2 in the products which results in the modest increase of the oxygen permeation flux, compared with the case of air/He.
Language英语
WOS IDWOS:000182347400004
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138319
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Wang, HH,Cong, Y,Yang, WS,et al. Study on oxidative coupling of methane in oxygen permeable tubular membrane reactor[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(3):169-174.
APA Wang, HH,Cong, Y,Yang, WS,&Lin, LW.(2003).Study on oxidative coupling of methane in oxygen permeable tubular membrane reactor.CHINESE JOURNAL OF CATALYSIS,24(3),169-174.
MLA Wang, HH,et al."Study on oxidative coupling of methane in oxygen permeable tubular membrane reactor".CHINESE JOURNAL OF CATALYSIS 24.3(2003):169-174.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, HH]'s Articles
[Cong, Y]'s Articles
[Yang, WS]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, HH]'s Articles
[Cong, Y]'s Articles
[Yang, WS]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, HH]'s Articles
[Cong, Y]'s Articles
[Yang, WS]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

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