Publication: Pyrolysis study of Sarawak coal using thermogravimetric analysis
Date
2009
Authors
Othman N.F.
Boosroh M.H.
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Abstract
Pyrolysis of Sarawak coal was conducted using thermogravimetric (TG) study. Two coal samples, subbituminuous (Merit Pila coal) and bituminous (Silantek coal) were investigated within the temperature range of 300 900 �C at different heating rates of 10, 20, 30 and 40 �C min-1, under inert nitrogen gas atmosphere. Differential thermogravimetric (DTG) data were analyzed using an Arrhenius type reaction model assuming a first-order reaction. Kinetic parameters, such as reactivity value, RT and activation energy, Ea for the coals, were determined at different heating rates. Maximum rate temperatures and reactivity values for the coals were increased as the heating rates increased. The temperature at which maximum rate of decomposition occurred was found to be higher for bituminous coal than for lower rank coal. The activation energy Ea for the coal is 37.40-38.92 kJ mol-1, with subbituminous coal showing slightly higher Ea than bituminous coal.
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Keywords
Activation energy , Pyrolysis , Reactivity , Sarawak coal , Thermogravimetric (TG) analysis , Activation analysis , Activation energy , Bituminous coal , Coal industry , Heating , Heating rate , Inert gases , Nitrogen , Pyrolysis , Activation energy E , Arrhenius-type reaction , Coal sample , Differential thermogravimetric , First order reactions , Inert nitrogen , Pyrolysis study , Rank coal , Reactivity , Sarawak , Subbituminous coal , Temperature range , Thermogravimetric (TG) analysis , Thermogravimetric analysis