KINETICS AND EQUILIBRIUM OF MICROWAVE CATALYTIC PYROLYSIS ON LOW-RANK COAL USING Fe2(SO4)3-HZSM-5
Microwave Catalytic Pyrolysis (MCP) has emerged as an effective method for converting low-rank coal (LRC) intovaluable energy resources. This study investigated the kinetics and thermodynamics of LRC pyrolysis using a dual catalyst system of Fe2(SO4)3-HZSM-5 under optimised operating conditions. The Coats–Redfern integral methodwas utilised to ascertain the kinetic parameters, indicating that the reaction adhered to first-order kinetics with10.1kJ/mol as an activation energy, demonstrating the significant catalytic effect in reducing the energy barrier. Calculations were performed for thermodynamic values, such as enthalpy (ΔH), entropy (ΔS), and Gibbs free energy(ΔG). The negative ΔH and ΔS values indicated an exothermic process with reduced molecular randomness, whilethe positive ΔG value revealed that the reaction did not occur spontaneously under the studied temperatures. Thesefindings confirm the catalytic efficiency in enhancing LRC conversion and provide important insights intothefeasibility and mechanism of the reaction. The study highlights the potential of MCP as a clean and efficient technology for utilising low-grade coal.
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