Pyrolysis of metal oxides treated Canarium schweinfurthii Shell: Investigation of thermogravimetric kinetics and thermodynamics.

Autor: Garba K; Department of Chemical Engineering, Abubakar Tafawa Balewa University, P.M.B 0248, Bauchi, Nigeria., Mohammed HI; Department of Chemical Engineering, Abubakar Tafawa Balewa University, P.M.B 0248, Bauchi, Nigeria.; Department of Chemical Engineering, University of Maiduguri, P.M.B 1069, Maiduguri, Nigeria., Isa YM; School of Chemical and Metallurgical Engineering, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, 2000, Johannesburg, South Africa.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Jul 10; Vol. 10 (14), pp. e34435. Date of Electronic Publication: 2024 Jul 10 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e34435
Abstrakt: Metal oxides as catalysts alter the properties of the pyrolysis vapor secondary reactions during the thermal decomposition of several biomass leading to high-value bio-oils. This study aimed to investigate the thermal decomposition characteristics of Canarium Schweinfurthii (CS) shells that were treated with various metal oxides (ZnO, CuO, Fe 2 O 3 /FeO, and Fe 2 O 3 ) using pyrolysis. The study also sought to identify pyrolysis reaction parameters (kinetics and thermodynamics parameters) that are not widely documented. Thermogravimetric pyrolysis was carried out at different heating rates, and the undocumented pyrolysis kinetic parameters were determined using the Flynn-Wall Ozawa method (FWO) according to American Standard Testing and Materials (ASTM) 6441 guidelines for assessing biomass decomposition. The metal oxide-treated CS shells lost significant weight between 62 and 67 wt% during the thermogravimetric pyrolysis, lower than 75 wt% of the CS shell. The average activation energies (E α ) for pyrolysis of the ZnO, CuO, Fe 2 O 3 /FeO, and Fe 2 O 3 treated CS shells were 203.04, 155.35, 338.85, and 219.92 kJ/mol, respectively in contrast to that of the untreated CS-shell. The Bayesian Information Criteria revealed that the diffusion kinetics of the Gistling-Brounshtein model best describes the pyrolysis of the shell mixed with metal oxides. The metal oxides affected the CS shells' pyrolysis kinetic parameter (E α ), which can promote pyrolysis vapor upgrading to encourage the widespread use of metal oxides in pyrolysis for bioenergy and chemical recovery.
Competing Interests: There are no competing financial or personal interests that could have appeared to affect the study reported in the research paper.
(© 2024 Published by Elsevier Ltd.)
Databáze: MEDLINE
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