화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.47, No.6, 676-682, December, 2009
Export Citation
열중량 분석 기법을 통한 RDF의 열분해 특성 조사
Study on the Pyrolysis Kinetics of RDF(Refuse Derived Fuel) with Thermogravimetric Analysis
김동원, 이종민†, 김재성
  • 한전전력연구원 녹색성장연구소, 305-380 대전광역시 유성구 문지로 65
Dong-Won Kim, Jong-Min Lee†, and Jae-Sung Kim
  • Green Growth Laboratory, Korea Electric Power Research Institute, KEPCO, 65 Munji-ro, Yuseong-gu, Daejeon 305-343, Korea
E-mail:
초록
본 연구에서는 국내 원주에서 생산되고 있는 RDF의 열분해 특성을 조사하기 위해 열중량 분석기(TGA)를 이용하여 비등온 실험(10, 20, 30 ℃/min)을 수행하여 분석하였다. 다양한 성분의 물질을 함유한 RDF는 승온 속도에 따라 차이가 있으나, 대체로 350~700 ℃ 사이에서 열분해 및 연소되었으며, 최대 열분해 반응속도를 나타내는 온도는 석탄의 그것에 비해 매우 빠름을 알 수 있었다. Friedman 및 Flynn-Wall-Ozawa의 방법을 이용하여 평균한 활성화에너지 값은 각각 14.44, 18.40 kcal/mol이었으며, Friedman의 방법을 통해 반응 차수는 1.219, 빈도인자 3.02×10^(5)(s^(-1))의 값을 얻었다. 또한 Coats Redfern의 방법을 통해 앞서 계산한 활성화에너지 값과의 유사성을 비교하여 고체상의 연소반응 메커 니즘을 판단할 경우, 개별 입자들 사이에서 하나의 핵에서 핵화되는 반응인 1차 화학 반응(F1)이 가장 유사한 반응 메커니즘으로 판단되었다.
Devolatilization of the Refuse Derived Fuel(RDF) which is produced at WonJu in Korea was characterized in air atmosphere with variation of heating rate(10, 20 and 30 ℃/min) in TGA. The results of TG Analysis have shown that the pyrolysis and char combustion of the RDF occurred in the range of 350~700 ℃ depending on the heating rate. Activation energy of the RDF which was determined by using Friedman and Ozawa-Flynn-Wall method was in the range of 14.44~18.40 kcal/mol. Also, reaction order(n) and pre-exponential factors(A) were 1.219 and 3.02×10^(5) by using Friedman method, respectively. In order to find out the devolatilization mechanism of the RDF, twelve solid-state mechanisms defined by Coats Redfern Method were tested. The results of the Coats Redfern Method have shown that chemical reaction is the effective mechanism by comparison with the value of the activation energy which was derived from the Friedman and Flynn-Wall-Ozawa method and correlation coefficient from twelve solid-state mechanisms of Coats Redfern Method. The solid state decomposition mechanism of the RDF was found to be a decelerated F1 type, random nucleation with one nucleus on the individual particle.
Keywords:TGA(Thermogravimetric Analyzer);RDF(Refuse derived fuel);Activation Energy;Pre-Exponential Factor
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