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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Supercritical Water Gasification of Low Rank Coal with High Moisture Content

고함수 저등급 석탄의 초임계수 가스화 특성

  • Yoon, Sang Jun (Clean Fuel Department, Korea Institute of Energy Research) ;
  • Lee, Jae Goo (Clean Fuel Department, Korea Institute of Energy Research) ;
  • Ra, Ho Won (Clean Fuel Department, Korea Institute of Energy Research) ;
  • Seo, Myung Won (Clean Fuel Department, Korea Institute of Energy Research)
  • 윤상준 (한국에너지기술연구원, 청정연료연구단) ;
  • 이재구 (한국에너지기술연구원, 청정연료연구단) ;
  • 라호원 (한국에너지기술연구원, 청정연료연구단) ;
  • 서명원 (한국에너지기술연구원, 청정연료연구단)
  • Received : 2013.07.08
  • Accepted : 2013.08.31
  • Published : 2013.08.31
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Abstract

Study on clean and efficient utilization technology for low rank coal with high moisture content is actively ongoing due to limited reserves of petroleum and of high grade coal and serious climate change caused by fossil fuel usage. In the present study, supercritical water gasification of low rank coal was performed. With increasing reaction temperature, content of combustible gases such as $H_2$ and $CH_4$ in the syngas increased while the $CO_2$ content decreased. As the reaction pressure increased from 210 to 300 bar, the $CO_2$ content in the syngas increased while the hydrocarbon gas content decreased. The $H_2$ and $CH_4$ content in the syngas increased slightly with pressure. With the addition of Pd, Pt, and Ru catalysts, it was possible to improve the production of $H_2$. Moreover, the increase of active metal content in the catalyst increased the $H_2$ productivity. The Ru catalyst shows the best performance for increasing the $H_2$ content in the syngas, while decreasing the $CO_2$ content.

Keywords

References

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