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공급가스 및 스윕가스 유량에 따른 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 분리막의 산소투과특성
박세형 ( Se Hyung Park ),손종석 ( Jong Suk Sonn ),이홍주 ( Hong Joo Lee ),박정훈 ( Jung Hoon Park ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.4
Dense ceramic membranes have been prepared using the commercial perovsikite Ba0.5Sr0.5Co0.8Fe0.2O3-δ, powders synthesized by the solid state reaction method. The as-synthesized powders were compressed into disks with 1.0 mm of thickness and the disk was sintered at 1,100℃ for 2 hr. The oxygen permeation flux of Ba0.5Sr0.5Co0.8Fe0.2O3-δ membrane increased with the increasing temperature and oxygen partial pressure. The activation energy for oxygen permeation was increased with the increasing oxygen partial pressure. Oxygen permeation flux at 950℃ were measured at various flow rates of feed and sweep gas. It has been demonstrated that oxygen permeability increased at elevated flow rates of both gases, but the sweep gas is more influential.