Abstract
Non-isothermal thermogravimetric experiments pertaining to garlic husk (GH) biomass were carried out at four heating rates, namely, 5, 10, 15 and 20 °C/min. Majority of volatile components of GH biomass were found to thermally degrade in the range of 210–370 °C. Kinetic parameters were calculated by employing isoconversional model-free Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), Starink, and Kissinger methods. Thermodynamic parameters (enthalpy, entropy, and Gibbs free energy) were estimated. Average activation energy for GH pyrolysis from KAS, FWO, and Starink methods was found to be 153.95, 154.91, and 154.32 kJ/mol, respectively. The average ∆H for KAS, FWO, and Starink was found to be 149.39, 150.35, and 149.75 kJ/mol, respectively and the average ∆G was found to be 150.55, 150.49 and 150.51 kJ/mol for the respective methods. The data obtained for GH biomass pyrolysis was found to fit well with second order reaction (R2) model based on z(α) master plot.
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