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 and Boon Xian Chai

Renewable Energy, 2024, vol. 231, issue C

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 (R2 > 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 (ΔH, ΔG, and ΔS) 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.

Keywords: S. Romanzoffiana palm fibers; Thermogravimetric analysis (TGA); Coats-redfern method (CRM); Pyrolysis; Kinetics; Thermodynamics (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:231:y:2024:i:c:s0960148124009960

DOI: 10.1016/j.renene.2024.120928

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