Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Development of Ceramic Composite Membranes for Gas Separation: IV. Permeation Characteristics of ${\gamma}$-Alumina Membranes

기체분리용 세라믹 복합분리막의 개발 : IV. ${\gamma}$-알루미나 분리막의 투과 특성

  • 현상훈 (연세대학교 세라믹공학과) ;
  • 강범석 (연세대학교 세라믹공학과) ;
  • 최두진 (연세대학교 세라믹공학과)
  • Published : 1992.12.01
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Abstract

${\gamma}-alumina$ membranes were prepared by sol-gel dip coating or pressurized coating of boehmite sols on slipcasted ${\gamma}-alumina$ support tubes. The particle size of sols synthesized via the modified Yoldas-method could be controlled below 5 mn according to the mole ratio of nitric acid/aluminumtri-sec-butoxide (0.07~1.0). The reproducible crack-free composite membranes were produced by the 2nd dip coating or the pressurized coating technique using very stable sols with the particle size of 45 nm. Nitrogen gas permeability through the top-layer in the composite membrane was about $70~55{\times}10^{-7}\;mol/m^2{\cdot}s{\cdot}Pa$. The thermal stability of the top layer was proved to be good enough upto the heat-treatment temperature of $500^{\circ}C$.

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References

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