Coupled effect of torrefaction and blending on chemical and energy properties for combustion of major open burned agriculture residues in Thailand

Kajina Wanida, Rousset Patrick, Chen Wei-Hsin, Sornpitak Thitima, Commandre Jean-Michel. 2018. Coupled effect of torrefaction and blending on chemical and energy properties for combustion of major open burned agriculture residues in Thailand. Renewable Energy, 118 : 113-121.

Quartile : Q1, Sujet : ENERGY & FUELS / Quartile : Q1, Sujet : GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY (Science)

Résumé : Thailand is an agriculture-based country. It produces large amounts of open burned agricultural residues. A strategy to use them as biofuel all year round is to enhance their fuel properties by coupling blending and thermochemical pre-treatment. In this study, the pyrolytic behaviour of major residues (napier grass , rice straw, cassava stalks and corn cob) exposed to a high torrefaction temperature (300°C) was investigated for various blending ratios, i.e. 100:0, 50:50 and 70:30. The release of chlorine was quantified for each biomass blend, including, a new fouling risk index ratio. Also, the synergistic effects of both ignition and burnout temperatures were analysed. Rice starw and napier grass were found to be characterised by a high ash content and so large amounts of solid yield after torrefaction. Raw biomasses and untreated biomass blends were found to be less suitable as biofuel than torrefied biomasses. The ratio K2O:SiO2, indicator of fouling risk during combustion, was found to be low for all torrefied blends. The HHV:Cl ratio, indicator of combustion quality, indicated that NG mixed with RS (50:50 proportion) is the most promising blend. Significant synergetic effects were observed for biomasses mixed before torrefaction. The burnout temperatures for raw and torrefied biomasses were identified in the range 773-787 °C and 786-795 °C.

Mots-clés Agrovoc : Oryza sativa

Mots-clés géographiques Agrovoc : Thaïlande

Classification Agris : Q70 - Traitement des déchets agricoles

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

• Kajina Wanida, University of Technology Thonburi (THA)
• Rousset Patrick, CIRAD-PERSYST-UPR BioWooEB (THA) - auteur correspondant
• Chen Wei-Hsin, National Cheng Kung University (TWN)
• Sornpitak Thitima, University of Technology Thonburi (THA)
• Commandre Jean-Michel, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0001-9094-7879

Source : Cirad-Agritrop (https://agritrop.cirad.fr/585879/)

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