Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Contamination of Hydrogen Permeable Pd- based Membranes

Pd 계열 수소 분리막의 오염에 관한 연구

  • Han, Jonghee (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Yoon, Sung Pil (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Nam, Suk Woo (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Lim, Tae-Hoon (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Hong, Seong-Ahn (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Kim, Jinsoo (College of Environment and Applied Chemistry, Kyung Hee University)
  • 한종희 (한국과학기술연구원, 연료전지연구센터) ;
  • 윤성필 (한국과학기술연구원, 연료전지연구센터) ;
  • 남석우 (한국과학기술연구원, 연료전지연구센터) ;
  • 임태훈 (한국과학기술연구원, 연료전지연구센터) ;
  • 홍성안 (한국과학기술연구원, 연료전지연구센터) ;
  • 김진수 (경희대학교 환경응용화학대학)
  • Published : 2003.03.15
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Abstract

$H_2$ permeation flux though a $100{\mu}m-thick$ Pd-Ru (6wt%) membrane was measured at various temperatures and pressures. The permeation flux followed the Sievert's law and thus the rate-limiting step of the hydrogen permeation was the bulk atomic diffusion step. The activation energy of the permeation flux was obtained at 17.9 kJ/mol and this value is consistent with those published previously. While no degradation of the permeation flux wasfound in the membrane exposed to the $O_2$ and $CO_2$ environments for 100 hours, the membrane exposed to $N_2$ environment for 100 hours showed the degradation in the $H_2$ permeation flux. The $H_2$ permeation was decreased as the exposure temperature to $N_2$, environment was increased. The $H_2$ permeation flux was fully recovered after the membrane was kept in the $H_2$ environment for certain time. The permeation flux degradation might be caused by the formation of metal nitride on the membrane surface.

Keywords

References

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