Efforts were made to determine the activation energy and the reaction order by adopting Kissinger and Flynn-Wall-Ozawa analysis methods. All the data were acquired from TGA thermograms for the mixed fuels with different temperature heating rates. It could be known that both the coal and the mixed fuels decomposed thermally at temperature ranges of 300～700℃. The temperature at the maximum reaction rate, Tp, could be determined by DTG method, which could be obtained by differentiation of TGA thermogram. Kissinger analysis showed the linear relationship with experimental data, showing the activation energy of 319.64 ±4 kJ/mol. From Flynn-Wall-Ozawa analysis, it was shown that the activation energies and the reaction orders did not undergo any significant changes with both the conversions and the heating rates. It was considered from this facts that the combustion mechanism of the mixed fuels could not be affected by the extent of conversion and heating rate. In the present study, the activation energies showed different values according to the different analysis methods. The difference might be originated from the inconsistency of the mathematical data treatment method. In other words, while the activation energies obtained from the Kissinger method indicated the average values for overall reaction, that from Flynn-Wall-Ozawa method showed the average values for the each conversion around Tp.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. 실험자료
  2.2. 실험방법
 3. 결과 및 고찰
  3.1. TGA thermogram
  3.2. DTG thermogram
  3.3. Kissinger법을 이용한 활성화에너지(Eα)
  3.4. Flynn-Wall-Ozawa법에 의한 활성화에너지(Eα)와반응차수(n)
 4. 결 론
 참 고 문 헌

• 이갑두(계명대학교 환경과학과) | Kamp-Du Lee (Department of Environmental Science Keimyung University)
• 류태욱(계명대학교 환경과학과) | Tae-Uk Ryu (Department of Environmental Science Keimyung University)
• 박상원(계명대학교 환경과학과) | Sang-Won Park (Department of Environmental Science Keimyung University) Corresponding author