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J. Korean Ceram. Soc. > Volume 40(6); 2003 > Article
Journal of the Korean Ceramic Society 2003;40(6): 594.
doi: https://doi.org/10.4191/kcers.2003.40.6.594
La0.7Sr0.3Ga0.6Fe0.4O 분리막의 산소투과특성 및 합성가스의 생성
이시우, 이승영1, 이기성1, 정경원2, 김도경, 우상국1
한국과학기술원 재료공학과
1한국에너지기술연구원 에너지재료연구센터
Oxygen Permeation and Syngas Production of La0.7Sr0.3Ga0.6Fe0.4O Oxygen Permeable Membrane
L $a_{0.7}$S $r_{0.3}$G $a_{0.6}$F $e_{0.4}$ $O_{3-}$$delta$/ perovskite-type mixed conducting membranes, which could permeate oxygen selectively, have been fabricated and the microstructural features developed by varying the sintering conditions have been analyzed. The effects of surface modification and the membrane thickness on oxygen permeability have been evaluated under He/air environment. With increasing a grain boundary fraction, the overall oxygen permeability decreased. The syngas (CO+ $H_2$) has been produced by partial oxidation reaction of methane with the oxygen permeated through the membrane. Methane conversion and syngas yield have been evaluated as functions of the compositional ratio of feed gas and reaction temperature. In long-term duration test for 600 h, under C $H_4$+He/air environment, L $a_{0.7}$S $r_{0.3}$G $a_{0.6}$F $e_{0.4}$ $O_{3-}$$delta$/ membrane showed a highly stable performance.ormance.ormance.e.
Key words: Membranes, $LaSrGaFeO_3$, Syngas production, Oxygen permeation
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