Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Comparative Modeling of Low Temperature Char-CO2 Gasification Reaction of Drayton Coal by Carbon Dioxide Concentration

이산화탄소 농도에 따른 드레이톤 탄의 저온 차-이산화탄소 가스화반응 모델링 비교

  • Park, Ji Yun (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Lee, Do Kyun (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Hwang, Soon Cheol (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Kim, Sang Kyum (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Lee, Sang Heon (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Yoon, Soo Kyung (Department of College of Engineering, Hanyang University) ;
  • Yoo, Ji Ho (Clean Coal Center, Korea Institute of Energy Research) ;
  • Lee, Si Hyun (Clean Coal Center, Korea Institute of Energy Research) ;
  • Rhee, Young Woo (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
  • 박지윤 (충남대학교 녹색에너지기술전문대학원) ;
  • 이도균 (충남대학교 녹색에너지기술전문대학원) ;
  • 황순철 (충남대학교 일반대학원 바이오응용화학과) ;
  • 김상겸 (충남대학교 일반대학원 바이오응용화학과) ;
  • 이상헌 (충남대학교 녹색에너지기술전문대학원) ;
  • 윤수경 (한양대학교 공과대학) ;
  • 유지호 (한국에너지기술연구원 청정연료연구단) ;
  • 이시훈 (한국에너지기술연구원 청정연료연구단) ;
  • 이영우 (충남대학교 일반대학원 바이오응용화학과)
  • Received : 2013.05.07
  • Accepted : 2013.06.05
  • Published : 2013.09.30
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Abstract

We investigated the effects of the concentration of carbon dioxide on the char-$CO_2$ gasification reaction under isothermal conditions of $850^{\circ}C$ using the Drayton coal. Potassium carbonate was used to improve the low-temperature gasification reactivity. The enhancement of carbon dioxide concentration increased the gasification rate of char, while gasification rate reached a saturated value at the concentration of 70%. The best $CO_2$ concentration for gasification is determined to be 70%. We compared the shrinking core model (SCM), volumetric reaction model (VRM) and modified volumetric reaction model (MVRM) of the gas-solid reaction models. The correlation coefficient values, by linear regression, of SCM are higher than that of VRM at low concentration. While the correlation coefficients values of VRM are higher than that of SCM at high concentration. The correlation coefficient values of MVRM are the highest than other models at all concentration.

드레이톤 탄으로부터 제조된 차(char)의 $850^{\circ}C$ 등온조건 가스화 반응에서 반응기체인 이산화탄소-질소 혼합기체의 이산화탄소 농도가 반응속도에 미치는 영향에 대해 알아보았다. 저온 가스화 반응성을 높이기 위해 탄산칼륨을 사용하였다. 이산화탄소의 농도가 증가할수록 차-이산화탄소(char-$CO_2$) 가스화 반응성은 좋으며 전환율 증가 속도는 고농도에서는 일정하게 유지되었다. 가스화 반응성은 증가하였으며, 70% 이상의 고농도 조건에서는 일정하게 유지되었다. 기-고체 반응모델 중에서 shrinking core model (SCM)과 shrinking core model (SCM), modified volumetric reaction model (MVRM)을 비교하였다. 선형 회귀를 통해 얻은 상관계수 값은 저농도에서는 SCM이 VRM보다 높은 반면, 고농도에서는 VRM이 SCM보다 높은 값을 보였다. 모든 농도에서 MVRM의 상관계수 값은 다른 모델들 보다 가장 높은 값을 보였다.

Keywords

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