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Kinetic Studies of CO2 Gasification by Non-isothermal Method on Fly Ash Char

비등온법에 의한 비산재 촤의 CO2 가스화 특성

  • Kang, Suk-Hwan (Plant Engineering Center, Institute for Advances Engineering (IAE)) ;
  • Ryu, Jae-Hong (Plant Engineering Center, Institute for Advances Engineering (IAE)) ;
  • Lee, Jin-Wook (Plant Engineering Center, Institute for Advances Engineering (IAE)) ;
  • Yun, Yongseung (Plant Engineering Center, Institute for Advances Engineering (IAE)) ;
  • Kim, Gyoo Tae (SK Innovation Global Technology) ;
  • Kim, Yongjeon (SK Innovation Global Technology)
  • 강석환 (고등기술연구원 플랜트엔지니어링센터) ;
  • 류재홍 (고등기술연구원 플랜트엔지니어링센터) ;
  • 이진욱 (고등기술연구원 플랜트엔지니어링센터) ;
  • 윤용승 (고등기술연구원 플랜트엔지니어링센터) ;
  • 김규태 (SK이노베이션(주)) ;
  • 김용전 (SK이노베이션(주))
  • Received : 2013.03.13
  • Accepted : 2013.06.08
  • Published : 2013.08.01

Abstract

For the purpose of utilizing fly ash from gasification of low rank coal, we performed the series of experiments such as pyrolysis and char-$CO_2$ gasification on fly ash by using the thermogravimetric analyzer (TGA) at non-isothermal heating conditions (10, 20 and $30^{\circ}C/min$). Pyrolysis rate has been analyzed by Kissinger method as a first order, the reliability of the model was lower because of the low content of volatile matter contained in the fly ash. The experimental results for the fly ash char-$CO_2$ gasification were analyzed by the shrinking core model, homogeneous model and random pore model and then were compared with them for the coal char-$CO_2$ gasification. The fly ash char (LG coal) with low-carbon has been successfully simulated by the homogeneous model as an activation energy of 200.8 kJ/mol. In particular, the fly ash char of KPU coal with high-carbon has been successfully described by the random pore model with the activation energy of 198.3 kJ/mol and was similar to the behavior for the $CO_2$ gasification of the coal char. As a result, the activation energy for the $CO_2$ gasification of two fly ash chars don't show a large difference, but we can confirm that the models for their $CO_2$ gasification depend on the amount of fixed carbon.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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