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The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Comparative Evaluation of Steam Gasification Reactivity of Indonesian Low Rank Coals

인도네시아 저등급 석탄의 스팀 가스화 반응성 비교 평가

  • KIM, SOOHYUN (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • VICTOR, PAUL (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • YOO, JIHO (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • LEE, SIHYUN (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • RHIM, YOUNGJOON (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • LIM, JEONGHWAN (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • KIM, SANGDO (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • CHUN, DONGHYUK (Clean Fuel Laboratory, Korea Institute of Energy Research) ;
  • CHOI, HOKYUNG (Clean Fuel Laboratory, Korea Institute of Energy Research)
  • 김수현 (한국에너지기술연구원 청정연료연구실) ;
  • ;
  • 유지호 (한국에너지기술연구원 청정연료연구실) ;
  • 이시훈 (한국에너지기술연구원 청정연료연구실) ;
  • 임영준 (한국에너지기술연구원 청정연료연구실) ;
  • 임정환 (한국에너지기술연구원 청정연료연구실) ;
  • 김상도 (한국에너지기술연구원 청정연료연구실) ;
  • 전동혁 (한국에너지기술연구원 청정연료연구실) ;
  • 최호경 (한국에너지기술연구원 청정연료연구실)
  • Received : 2016.11.25
  • Accepted : 2016.12.30
  • Published : 2016.12.30
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Abstract

Steam gasification of low rank coals is possible at relatively low temperature and low pressure, and thus shows higher efficiency compared to high rank coals. In this study, the gasification reactivity of four different Indonesian low rank coals (Samhwa, Eco, Roto, Kideco-L) was evaluated in $T=700-800^{\circ}C$. The low rank coals containing $53.8{\pm}3.4$ wt% volatile matter in proximate analysis and $71.6{\pm}1.2$ wt% carbon in ultimate analysis showed comparable gasification reactivity. In addition, $K_2CO_3$ catalyst rapidly accelerated the reaction rate at $700^{\circ}C$, and all of the coals were converted over 90% within 1 hour. The XRD analysis showed no significant difference in carbonization between the coals, and the FT-IR spectrum showed similar functional groups except for differences due to moisture and minerals. TGA results in pyrolysis ($N_2$) and $CO_2$ gasification atmosphere showed very similar behavior up to $800^{\circ}C$ regardless of the coal species, which is consistent with the steam gasification results. This confirms that the indirect evaluation of the reactivity can be made by the above instrumental analyses.

Keywords

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