Temperature-controlled combustion and kinetics of different rank coal samples |
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Authors: | M V Kök |
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Institution: | (1) Department of Petroleum and Natural Gas Engineering, Middle East Technical University, 06531 Ankara, Turkey |
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Abstract: | Differential scanning calorimetry (DSC) and thermogravimetry (TG/DTG) has been used to obtain information on the temperature-controlled combustion characteristics of seventeen coals of different origin from Thrace basin of Turkey. Experiments were performed in air atmosphere up to 600°C at a heating rate of 10°C min-1. The DSC/TG curves clearly demonstrate distinct transitional stages in the entire coal samples studied. Reaction intervals, peak and burn-out temperatures of the coal samples are also determined. Two different kinetic methods known as, Arrhenius and Coats-Redfern, were used to analyze the kinetic data and the results are discussed. |
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Keywords: | differential scanning calorimetry thermogravimetry thermal analysis reaction kinetics coal lignite |
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