HI concentration by EED for the HI decomposition in IS process

IS 프로세스의 HI 분해반응공정을 위한 전해 - 전기투석(EED) HI 농축

  • Hong, Seong-Dae (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kim, Jeong-Geun (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Lee, Sang-Ho (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Choi, Sang-Il (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Bae, Ki-Kwang (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Hwang, Gab-Jin (Hydrogen Energy Research Group, Korea Institute of Energy Research)
  • 홍성대 (한국에너지기술연구원 열화학수소연구단) ;
  • 김정근 (한국에너지기술연구원 열화학수소연구단) ;
  • 이상호 (한국에너지기술연구원 열화학수소연구단) ;
  • 최상일 (한국에너지기술연구원 열화학수소연구단) ;
  • 배기광 (한국에너지기술연구원 열화학수소연구단) ;
  • 황갑진 (한국에너지기술연구원 열화학수소연구단)
  • Published : 2006.06.15

Abstract

An experimental study on Electro-electrodialysis (EED) for IS (Iodine-Sulfur) process which is well known as hydrogen production system was carried out for the HI concentration from HIx (HI: $H_2O$ : $I_2$ = 1 : 5 : 1) solution. The polymer electrolyte membrane and the activated carbon cloth were adopted as a cation exchange membrane and electrode, respectively. In order to evaluate the temperature effect about HI concentration in fixed molar ratio, three case of temperature were selected to $60^{\circ}C$, $90^{\circ}C$ and $120^{\circ}C$. The electro-osmosis coefficient and transport number of proton have been changed from 1.95 to 1.21 (mol/Faraday) and 0.91 to 0.76, respectively as temperature increase from $60^{\circ}C$ to $120^{\circ}C$. It can be realized that the HI mole fraction in final stage of EED experiments already over the quasi-azeotrope composition.

Keywords

IS process;Electro-electrodialysis;HI concentration;Hydrogen production;Azeotrope composition

References

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