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Oxygen Permeation of SrFe1.125Co0.375Oy Membrane under the Coupling of CO Oxidation Reaction
Wang Dong,Ran Shen,Feng Shaojie,Jiang Ming,Chen Chusheng
Author NameAffiliation
Wang Dong School of Chemistry and Materials Science of the University of Science and Technology of ChinaHefei 230026 
Ran Shen School of Chemistry and Materials Science of the University of Science and Technology of ChinaHefei 230026 
Feng Shaojie School of Chemistry and Materials Science of the University of Science and Technology of ChinaHefei 230026 
Jiang Ming School of Chemistry and Materials Science of the University of Science and Technology of ChinaHefei 230026 
Chen Chusheng School of Chemistry and Materials Science of the University of Science and Technology of ChinaHefei 230026 
Abstract:
Oxygen permeation through dense SrFe1.125Co0.375Oy membranes was studied by exposing one side of the membranes to flowing air and the other side to the mixture of CO and helium. The oxygen permeation flux reached as large as 6.0 × 10- 7mol / cm2s at 900℃. The oxygen permeation showed a weak temperature dependence at temperatures about 850℃. The oxygen flux increased linearly with increasing CO partial pressure and remained almost constant with variation of the membrane thickness. These observations all indicate that the overall oxygen permeation process is limited by the surface reaction at the membrane surface exposed to CO.
Key words:  Oxygen permeation,SrFe1.125Co0.375Oy ,Coupling of oxidation reaction
FundProject:国家863新材料委员会(715-006-0120)和国家自然科学基金(59789201)资助项目
CO氧化反应耦合下SrFe1.125Co0.375Oy的氧渗透行为
王东,冉申,冯绍杰,姜明*,陈初升
摘要:
报道SrFe1.125Co0.375Oy致密陶瓷膜在高氧梯度下的氧渗透行为。将膜的一端置于空气中,另一端引入CO,通过CO的氧化反应降低氧分压,增大膜两端的氧分压梯度。研究发现:900℃时氧渗透率高达16.0×10-7mol/cm2s。在850℃以上,氧渗透率与温度的依赖关系不显著,而氧渗透量与CO分压成线形关系,并且与膜的厚度变化基本无关。这表明在该膜材料的氧渗透过程是受表面反应控制的。
关键词:  氧渗透  SrFe1.125Co0.375Oy  氧化反应耦合
DOI:1003-7713/2000/06-0731-05
分类号: