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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The Characteristics of HI Decomposition using Pt/Al2O3 Catalyst Heat Treated in Air and Hydrogen Atmosphere

공기 및 수소 분위기에서 열처리 된 Pt/Al2O3 촉매의 HI분해반응 특성

  • Park, Eun Jung (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Ko, Yun Ki (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Park, Chu Sik (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Kim, Chang Hee (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Kang, Kyoung Soo (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Cho, Won Chul (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Jeong, Seong Uk (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Bae, Ki Kwang (Hydrogen and Fuel Cell Department, Korea Institute of Energy Research) ;
  • Kim, Young Ho (Department of Industrial Chemistry Chung-nam university)
  • Received : 2014.03.18
  • Accepted : 2014.06.30
  • Published : 2014.06.30
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Abstract

In HI decomposition, $Pt/Al_2O_3$ has been studied by several researchers. However, after HI decomposition, it could be seen that metal dispersion of $Pt/Al_2O_3$ was greatly decreased. This reason was expected of platinum loss and sintering, which platinum was aggregated. Also, this decrease of metal dispersion caused catalytic deactivation. This study was conducted to find the condition to minimize platinum sintering and loss. In particular, heat treatment atmosphere and temperature were examined to improve the activity of HI decomposition reaction. First of all, although $Pt/Al_2O_3$ treated in hydrogen atmosphere had low platinum dispersion between 13 and 18%, it was shown to suitable platinum form that played an important role in improving HI decomposition reaction. Oxygen in the air atmosphere made $Pt/Al_2O_3$ have high platinum dispersion even 61.52% at $500^{\circ}C$. Therefore, in order to get high platinum dispersion and suitable platinum form in HI decomposition reaction, air heat treatment at $500^{\circ}C$ was needed to add before hydrogen heat treatment. In case of 5A3H, it had 51.13% platinum dispersion and improved HI decomposition reaction activity. Also, after HI decomposition reaction it had considerable platinum dispersion of 23.89%.

Keywords

References

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