Abstract
AbstractThermochemical decomposition of 16 samples of low‐rank Thar coal has been investigated using non‐isothermal thermogravimetric data under an inert environment. Rapid weight loss of volatiles was found in the regions of 164–233 and 473–503 °C. Kinetics of pyrolysis reaction showed that the volatiles released in three consecutive steps follow first‐order reaction. The kinetic evaluation focuses on all the steps to estimate activation energy, pre‐exponential factor and the contribution of each step to the overall reaction. The results showed that evaporation of moisture and low‐temperature volatile compounds require 3.17–4.81 kJ mol−1 activation energy. The combustion of char required a higher amount of energy (10.86–36.11 kJ mol−1). The formation of secondary char required 10.34–24.00 kJ mol−1 energy. The results suggested that Thar coal has a substantial potential for gasification due to high volatile content and low activation energy. © 2015 Curtin University of Technology and John Wiley & Sons, Ltd.
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