Thermal decomposition of Syagrus romanzoffiana palm fibers: Thermodynamic and kinetic studies using the coats-redfern method
Oussama Ferfari, Ahmed Belaadi, Mostefa Bourchak, Djamel Ghernaout, Rafic M. Ajaj, Boon Xian Chai
Abstract
This work uses thermogravimetric analysis to perform the thermokinetics and thermodynamic studies of Syagrus romanzoffiana fibers (SRFs). In a nitrogen environment, SRFs were heated non-isothermally between 25 and 800 °C at four heating rates of 5 °C/min, 10 °C/min, 15 °C/min, and 20 °C/min. According to thermogravimetric examination, the pyrolysis of SRFs occurred in three steps. The second stage has had its kinetic and thermodynamic characteristics determined. The low-temperature stable components were decomposed at temperatures ranging from 218 to 376 °C, 218–391 °C, 218–394 °C, and 218–398 °C at heating rates of 5 °C/min, 10 °C/min, 15 °C/min, and 20 °C/min, respectively. The Coats-Redfern method was applied to twenty-one distinct kinetic models representing four key solid-phase reaction processes. The diffusion model using the Zhuravlev equation is the best-fitted model, having the most outstanding correlation coefficient values ( R 2 > 0.99) for all heating rates. Heating rates of 5, 10, 15, and 20 °C/min resulted in activation energy values of 114.02, 118.77, 119.44, and 113.89 kJ/mol, respectively. Thermodynamic characteristics (Δ H , Δ G , and Δ S ) were computed using kinetic parameters . The data presented here helps evaluate SRFs as a possible biomass renewable energy source for building reactors and generating chemicals.