대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제35권10호
  • /
  • Pages.997-1003
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  • 2011
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  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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초청정 석탄의 탈휘발 반응률에 관한 실험적 연구

An Experimental Study on the Devolatilization Kinetics of Ashless coal in Fixed and Entrained Conditions

  • 유다연 (부산대학교 대학원 기계공학부) ;
  • 이병화 (부산대학교 대학원 기계공학부) ;
  • 송주헌 (부산대학교 기계공학부, Pusan Clean Coal Center) ;
  • 이시훈 (한국에너지기술연구원) ;
  • 전충환 (부산대학교 기계공학부, Pusan Clean Coal Center)
  • Yu, Da-Yeon (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Lee, Byoung-Hwa (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Song, Ju-Hun (School of Mechanical Engineering, Pusan Nat'l Univ., Pusan Clean Coal Center) ;
  • Lee, Si-Hyun (Korea Institute of Energy Research) ;
  • Jeon, Chung-Hwan (School of Mechanical Engineering, Pusan Nat'l Univ., Pusan Clean Coal Center)
  • 투고 : 2011.02.17
  • 심사 : 2011.08.12
  • 발행 : 2011.10.01
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초록

본 연구는 낮은 회 성분의 함량과 높은 발열량의 특성을 지닌 초청정 석탄의 탈휘발 반응율 특성을 연구하였다. 정적 상태에서의 탈휘발 반응율 특성을 얻기 위하여 TGA 장치를 $10^{\circ}C$/min으로 $950^{\circ}C$까지 승온시키며 Coats-Redfern 방법을 사용하여 결과를 도출하였고, 동적 상태에서는 DTF(Drop Tube Furnace) 반응로 온도를 각각 $500^{\circ}C$, $700^{\circ}C$, $900^{\circ}C$, $1100^{\circ}C$, $1300^{\circ}C$로 변화시켜서 실험을 수행하였으며 single step 방법을 통해 탈휘발 반응율 특성을 얻었다. 본 연구를 통해 도출한 초청정 석탄의 탈휘발 반응율 특성은 기존에 사용되어온 Wira(아역청탄)과 Yakurugol(역청탄)의 탈휘발 특성과 비교하였으며, 정적 동적 상태에서 초청정 석탄의 활성화 에너지가 다른 탄종들에 비해 작게 나타났다.

In order to investigate devolatilization characteristics for ashless coal with relatively low ash content and high heating value, an experiment was performed in different bed configurations of TGA and DTF(Drop Tube Furnace) at atmospheric pressure condition. The heating rate was $10^{\circ}C$/min up to $950^{\circ}C$ in TGA, while the temperatures of DTF varied from 500 to $1300^{\circ}C$ in step of $200^{\circ}C$. A weight loss and particle temperature were obtained to determine devolatilization kinetics. The kinetic parameters including an activation energy and pre-exponential factor for ashless coal were obtained using Coats-Redfern method in TGA and single step method in DTF. Furthermore, the devolatilization kinetics of the ashless coal were compared with the results of different kinds of conventional coal such as sub-bituminous and bituminous. The results show that the activation energy of devolatilazation for ashless coal is lower than those of others in fixed and entrained conditions.

키워드

참고문헌

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