OXYGEN PERMEATION AND STABILITY OF Ba0.5Sr0.5Co0.8Fe0.2O3-δ MEMBRANE ACCORDING TO CO2 CONCENTRATION IN SYNTHETIC AIR
IntroductionThe oxy-fuel combustion process eliminates nitrogen from the flue gas by combusting a hydrocarbon or carbonaceous fuel in either pure oxygen or mixture of pure oxygen and a CO2-rich recycled flue gas. Oxygen is the key requirement for any oxy-fuel combustion system. To commercialize an oxy-fuel combustion system, more economical process than existing method is still necessary because the bottle neck of oxy-fuel combustion is oxygen production cost. Recently, membrane system using ceramic mixed oxides has been developed to obtain high efficiency and low oxygen production cost in combustion temperatures above 700℃. Especially, dense mixed-conducting ceramic membranes such as LSCF type 1-3, LSTF type 4, 5 and BSCF type oxides 6 are of significant interest due to potential application for high-purity oxygen separation from air. Among the oxygen ion transport membranes (ITM), perovskite-type (ABO3) ceramic membranes exhibit the highest oxygen permeability due to their high ionic and electronic conductivity. However, ceramic membrane can be deactivated for long time operation at high temperature over 700℃ when air with carbon dioxide supplies as feed gas. This process is originated from reaction between metal and carbon dioxide and formation of carbonate such as SrCO3 etc.
Jung Hoon Park Jong Pyo Kim Sou Hwan Son Yun Ho Jung
Green House Gas Research Center, Korea Institute of Energy Research 71-2, Jang-dong, Yuseong-gu, Daejeon, 305-343 Korea
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
289-290
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）