Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Oxygen Permeability of Tubular $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ Membranes with $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$ Porous Coating Layer

다공성의 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$가 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 제조 및 투과 특성

  • Kim, Jong-Pyo (Department of Chemical Engineering, Chungnam National University) ;
  • Pyo, Dae-Woong (Greenhouse Gas Research Center, Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Park, Jung-Hoon (Greenhouse Gas Research Center, Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Lee, Yong-Taek (Department of Chemical Engineering, Chungnam National University)
  • 김종표 (충남대학교 화학공학과) ;
  • 표대웅 (한국에너지기술연구원 온실가스연구단) ;
  • 박정훈 (한국에너지기술연구원 온실가스연구단) ;
  • 이용택 (충남대학교 화학공학과)
  • Received : 2011.11.04
  • Accepted : 2012.01.26
  • Published : 2012.02.29
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Abstract

Tubular $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ membranes with $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$ porous coating layer were prepared by extrusion and dip coating technique. XRD and SEM result showed the tubular membrane possessed the perovskite structure and porouscoating layer (thickness= about $2{\mu}m$) in surface. The oxygen permeation test was measured at condition of ambient air (feed side) and vacuum (permeate side) in the temperature range from 750 to $950^{\circ}C$. The oxygen permeation flux of $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ tubular membrane with $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$ porous coating layer reached maximum $3.2mL/min{\cdot}cm^2$ at $950^{\circ}C$ and was higher than non-coated $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ tubular membrane. Long-term stability test result indicated that the oxygen permeation flux was quite stable during the 11 day.

다공성 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$로 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막은 압출성형 및 dip coating 방법으로 제조 되었다. 코팅된 관형 분리막의 특성은 X-선 회절분석기(XRD)와 전자 주사 현미경(SEM)을 이용하여 분석하였으며, 분석결과 $2{\mu}m$의 다공성 코팅 층을 갖는 페롭스카이트 구조임을 알 수 있었다. 산소투과량 분석은 $750{\sim}950^{\circ}C$ 범위에서 공급측과 투과 측을 대기 중 공기와 진공으로 하여 수행되었다. 다공성의 $La_{0.6}Sr_{0.4}Ti_{0.3}Fe_{0.7}O_{3-{\delta}}$로 코팅된 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 관형 분리막의 산소투과량은 $950^{\circ}C$에서 $3.2mL/min{\cdot}cm^2$로 코팅되지 않은 분리막보다 높게 나타났으며, 11일 동안의 장기 안정성 실험결과 코팅 층에 의해 안정성이 증가됨을 알 수 있었다.

Keywords

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