Study on the Preparation of Inorganic Composite Membrane and Characteristics of Gas Separation of Zirconium Modified Polycarbosilane via Pyrolysis

지르코늄 혼성 폴리카르보실란의 열분해에 의한 무기 복합막 제조 및 기체분리 특성 연구

  • Kang, Phil Hyun (Department of Industrial Chemistry, Graduate School, Chungnam National University) ;
  • Lee, Kew Ho (Membranes and Separation Research Center, Korea Research Institute of Chemical Technology) ;
  • Yang, Hyun Soo (Department of Industrial Chemistry, Graduate School, Chungnam National University)
  • 강필현 (충남대학교 대학원 공업화학과) ;
  • 이규호 (한국 화학연구소 막분리연구센터) ;
  • 양현수 (충남대학교 대학원 공업화학과)
  • Received : 1998.12.23
  • Accepted : 1999.11.22
  • Published : 1999.12.10

Abstract

The surface of an ${\alpha}$-alumina tube was coated with zirconium modified polycarbosilane(PZC) by dip-coating method. Then the tube was pyrolyzed at 573~823 K. The prepared inorganic composite membrane was in $1{\mu}m$ thickness and had no pinholes larger than several nm. For the pyrolyzed inorganic composite membrane, the permeation test of He, $N_2$, $CO_2$, and $O_2$ was performed at 303~423 K. The gas permeation and separation factor were increased with increasing permeation temperature. The permeation for gases was controlled by the activated diffusion mechanism. The separation factor of $CO_2$, to $N_2$was 4.9 at 363 K on the composite membrane pyrolyzed at 823 K and its value was higher than that of He and $O_2$.

Keywords

zirconium modifid polycarbosilane;inorganic composite membrane;gas separation

Acknowledgement

Supported by : 한국과학재단

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