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Type: Artigo
Title: Thermal decomposition kinetics modeling of energy cane Saccharum robustum
Author: Carvalho, Vinícius Souza de
Tannous, Katia
Abstract: This work aims to study the thermal decomposition kinetics of energy cane Saccharum robustum. The experiments were carried out in a thermogravimetric analyzer at heating rates of 5, 10 and 20 °C/min under nitrogen atmosphere and mean particle diameter of 253.5 μm. Three thermal decomposition stages were identified: dehydration, pyrolysis and carbonization. The activation energies were determined through three model-free methods (Friedman, Flynn-Wall-Ozawa, and Vyazovkin) varying between 107.5 and 204 kJ/mol. The master plots showed different representations of conversion functions (reaction orders from 2 to 7). The linear model fitting method validated the activation energy (177.1 kJ/mol) obtained by single-step reaction. Moreover, a multi-step method was proposed considering four independent parallel reactions (extractives, hemicellulose, cellulose, and lignin) obtaining activation energies from 60 to 181 kJ/mol, pre-exponential factor from 1.1 ∙ 102 to 5.8 ∙ 1012 1/s, 1st and 3rd reaction orders, and compositions from 0.12 to 0.43 with high quality of fit
Subject: Cana-de-açucar
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.tca.2017.09.016
Date Issue: 2017
Appears in Collections:FEQ - Artigos e Outros Documentos

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