Effect of torrefaction on thermal behavior and fuel properties of Eucalyptus grandis macro-particulates

Silveira A. Edgar, Oliveira Galvão Luiz Gustavo, Sá Isabella A., Silva Bruno F., Macedo Lucélia, Rousset Patrick, Caldeira-Pires Armando. 2019. Effect of torrefaction on thermal behavior and fuel properties of Eucalyptus grandis macro-particulates. Journal of Thermal Analysis and Calorimetry, 138 (5) : 3645-3652.

Quartile : Q2, Sujet : THERMODYNAMICS / Quartile : Q2, Sujet : CHEMISTRY, ANALYTICAL / Quartile : Q3, Sujet : CHEMISTRY, PHYSICAL

Résumé : Considered as a carbon-neutral fuel from a climate change perspective and the most common renewable resource, biomass needs an energetic conversion process to replace more conventional energy sources. Torrefaction is a thermal modification process used to improve biomass as solid fuel. In this study, macro-particles of Eucalyptus grandis were investigated under an oxidizing atmosphere (10% O2). The aim was to evaluate the effect of the temperature (230, 250, 270 and 290 °C) and heating rates (3, 5 and 7 °C min−1) on 3 × 3 × 3 cm samples by the assessment of the dynamic solid yield and its derivative curve, proximate analysis as well as energy content. The solid yield decreases with increasing temperature showing a linear relationship (R2 = 0.97) for light and mild torrefaction and more aggressive behavior for severe torrefaction (280 and 290 °C) with degradation varying from 6.7 to 34.8% and a higher heating value enhancement varying from 3.4% (230 °C) to 24.3% (290 °C). The approach followed allows a characterization of biomass samples, thermal behaviors dynamics as well as the torrefied final product showing the impact of temperature, heating rate and residence time.

Mots-clés Agrovoc : énergie renouvelable, bois, torréfaction, température, Eucalyptus grandis

Classification Agris : P06 - Sources d'énergie renouvelable
K50 - Technologie des produits forestiers

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Auteurs et affiliations

• Silveira A. Edgar, UNB [Universidade de Brasilia] (BRA) - auteur correspondant
• Oliveira Galvão Luiz Gustavo, BSF (BRA)
• Sá Isabella A., UNB [Universidade de Brasilia] (BRA)
• Silva Bruno F., UNB [Universidade de Brasilia] (BRA)
• Macedo Lucélia, Laboratory of Forest Products (BRA)
• Rousset Patrick, CIRAD-PERSYST-UPR BioWooEB (THA) ORCID: 0000-0002-6956-7465
• Caldeira-Pires Armando, UNB [Universidade de Brasilia] (BRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/590516/)

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