Thermogravimetry (TG) has been applied in a preliminary investigation, to the gasification of two low rank Sarawak coals. The coal samples, about 10 mg were investigated within the temperature range 30–900°C at different heating rate of 10, 20 and 30°C min-1, under a synthetic air atmosphere for the gasification study. The kinetic parameters were determined using Arrhenius type reaction model assuming a first-order reaction. The reactivity, RT values are fitted with Arrhenius equation at r2 = 0.83 - 0.98 for MP coal, while the RT values for MB coal are fitted with the Arrhenius equation at r2 = 0.99. The activation energy, EA for MP coal are in the range of 3.7 -4.7 kJ mol-1 and for MB coal are 7.6 - 25.6 kJ mol-1 at 3 different heating rates.
Kneller, W.A. (1986), Physicochemical characterization of coal and coal reactivity. A review. Thermochimica Acta, 108, pp. 357-388.
Wang, S. et al. (2005), Kinetic studies of graphon and coal-char reaction with NO and O2: direct non-linear regression from TG curves. Fuel Processing Technology, 86, pp. 651-660.
Pan, Y.G., et al. (1996), Pyrolysis of blends of biomass with poor coals. Fuel, Vol. 75, No. 4, pp. 412-418.
Serageldin, M.A. and Pan, W-P. (1984), Coal analysis using thermogravimetry. Thermochimica Acta, 76, pp. 146-160.
Fernandez-Morales, I., et al. (1985), Study of heat-treated Spanish lignites. Characteristics and behaviour in CO2 and O2 gasification reactions. Fuel, 64, pp. 666-673.
Liu, X. et al. (2001), Analysis of pyrolysis and gasification reactions of hydrothermally and supercritically upgraded low-rank coal by using a new distributed activation energy model. Fuel Processing Technology, 69, pp. 1-12.
Ye, D.P. et al. (1998), Gasification of a South Australian low-rank coal with carbon dioxide and steam: kinetics and reactivity studies. Fuel, 77, pp. 1209-1219.