공업화학 (Applied Chemistry for Engineering)

  • 제26권2호
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  • Pages.184-192
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  • 2015
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  • 1225-0112(pISSN)
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  • 2288-4505(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
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석유 코크스, 바이오매스, 혼합연료의 이산화탄소 가스화 반응 연구

A Reaction Kinetic Study of CO2 Gasification of Petroleum Coke, Biomass and Mixture

  • 국진우 (전북대학교 자원에너지공학과) ;
  • 신지훈 (전북대학교 자원에너지공학과) ;
  • 곽인섭 (전북대학교 자원에너지공학과) ;
  • 이시훈 (전북대학교 자원에너지공학과)
  • Kook, Jin Woo (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Shin, Ji Hoon (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Gwak, In Seop (Department of Resources and Energy Engineering, Chonbuk National University) ;
  • Lee, See Hoon (Department of Resources and Energy Engineering, Chonbuk National University)
  • 투고 : 2015.01.17
  • 심사 : 2015.02.14
  • 발행 : 2015.04.10
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초록

석유 코크스, 바이오매스, 혼합연료들의 이산화탄소 가스화 반응성을 측정하고 비교하기 위해서 TGA (Thermogravimetric analyzer)를 이용하여 $1,100{\sim}1,400^{\circ}C$의 char-$CO_2$ 가스화 반응을 조사하였다. 기-고체반응속도 모델들에 적용하여 $1,100{\sim}1,400^{\circ}C$의 온도 영역에서의 반응 속도 상수를 구하였다. 또한 반응 속도 상수와 온도와의 관계를 Arrhenius 식에 적용하여 각 모델에서의 활성화에너지(Ea) 및 빈도 인자($K_0$)를 구하고 이를 실험값과 비교하여 석유 코크스, 바이오매스, 혼합 연료들의 이산화탄소 가스화 반응을 잘 모사하는 반응 속도식을 제시하였다. 반응온도가 증가할수록 이산화탄소 가스화에 소요되는 반응시간은 감축되었다. 또한 바이오매스와의 혼합이 증가할수록 활성화 에너지의 감소를 보여 바이오매스의 혼합이 석유 코크스의 이산화탄소 가스화 반응에 시너지 효과를 가져옴을 확인하였다.

Characteristics of Char-$CO_2$ gasification for petroleum coke, biomass and mixed fuels were compared in the temperature range of $1,100{\sim}1,400^{\circ}C$ using TGA (Thermogravimetric analyzer). Kinetic constants with respect to reaction temperature were determined by using different gas-solid reaction models. Also activation energy (Ea) and pre-exponential factors ($K_0$) in each models were calculated by using Arrhenius equation and then were compared with experimental values to determine reaction rate equation for char-$CO_2$ gasification. Reaction time for $CO_2$ gasification decreased with an increase of reaction temperature. Also, the activation energy of $CO_2$ gasification reaction for mixture with petroleum coke and biomass decreased with increasing biomass contents. This indicates that mixing with biomass could bring synergy effects on $CO_2$ gasification reaction.

키워드

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