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Received August 10, 2010
Accepted October 18, 2010
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저급탄의 열분해 및 촤-CO2 가스화 반응의 속도론적 연구
Kinetic Studies of Pyrolysis and Char-CO2 Gasification on Low Rank Coals
Suk-Hwan Kang
Jae-Hong Ryu
Soo-Nam Park
Yong-Soo Byun
Seok-Jung Seo
Yongseung Yun
Jin-Wook Lee†
Yong-Jeon Kim1
Joo-Hoe Kim1
Sam-Ryong Park1
고등기술연구원 플랜트엔지니어링센터, 449-863, 경기도 용인시 처인구 백암면 고안리 633-2 1SK에너지(주) 기술원, 305-712, 대전시 유성구 원천동 140-1
Plant Engineering Center, Institute for Advances Engineering(IAE), 633-2 Baegam-myeon, Yongin 449-863, Korea 1SK energy Institute of Technology, 140-1 Wonchon-Dong, Yuseong-gu, Daejeon 305-712, Korea
jwlee@iae.re.kr
Korean Chemical Engineering Research, February 2011, 49(1), 114-119(6), NONE Epub 9 February 2011
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Abstract
인도네시아 아역청탄인 ABK탄과 중국 갈탄(lignite)과 같은 저급탄에 대한 열분해와 촤-CO2 가스화반응에 대한 실험을 비등온의 승온 조건에서 열중량분석기(Thermogravimetric analysis, TGA)를 이용하여 수행하였다. 열분해 속도는 2단계, 1차의 열분해 모델(Kissinger 법의 변형)에 의해 잘 모사되었다. 촤의 CO2 가스화반응은 수축 핵 모델에 적용하여 초기의 활성화 에너지가 ABK탄은 189.1 kJ/mol, lignite는 260.5 kJ/mol의 값을 얻었으며, 수축 핵 모델에 의해 잘 모사되었다. 특히, 촤의 CO2 가스화반응에서 활성화 에너지는 무연탄의 결과와 유사하였으며, 다른 모델이나 석탄의 종류에 따라 큰 차이를 보였다.
Thermogravimetric analysis(TGA) was carried out for pyrolysis and char-CO2 gasification of low rank Indonesian ABK coal and China lignite. The pyrolysis rate was successfully described by a two-step model adopting the modified Kissinger method. The shrinking core model, when applied to char-CO2 gasification gave initial activation energy of 189.1 kJ/mol and 260.5 kJ/mol for the ABK coal and China lignite, respectively. Thus, the char-CO2 gasification has been successfully simulated by the shrinking core model. In particular, the activation energy of char-CO2 gasification calculated in this work is similar to the results on the anthracite coal, but considerable difference exists when other models or coal types are used.
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