Gasification kinetic and thermodynamic parameters of fine coal using thermogravimetric analysis

Understanding the kinetics of fine coal gasification is needed to improve the design process and optimize the production of clean energy. To establish the kinetic and thermodynamic characteristics of fine coal gasification and the function of the catalyst in the process, thermogravimetric analysis was performed. Four iso-conversional models were used to determine the activation energy: Friedman, Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Starink. The precise activation energy values are then utilized to compute the pre-exponential factor and thermodynamic parameters. For the Friedman, FWO, KAS, and Starink methods, the average activation energies were 142.14 kJ/mol, 102.49 kJ/mol, 89.09 kJ/mol, and 85.21 kJ/mol, respectively. The gasification process followed the second-order reaction based on the Coats-Redfern method, both non-catalytic and catalytic. In terms of thermodynamic properties, the entire gasification process is endothermic and acceptable, marked with positive values for ΔH and ΔG and negative values for ΔS. This kinetic and thermodynamic analysis could be useful for guiding for optimizing the fine coal gasification process.