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Theses

Comportement en combustion de résidus de biomasse : mise en évidence de synergies par mélange sous forme de granulés

Abstract : Combustion of biomass residues, which are generally poorly valued, could provide an attractive supply solution for energy production, alleviating pressure on forest resources. However, the chemical composition of these residues is causing both technical and environmental problems in existing combustion processes, which limits their use. Two of these problems have been addressed in this thesis: the amount of volatilized potassium and NOX emissions, when burning different residues. Combustion tests have been conducted in laboratory-scale reactors on pure and mixed biomass pellets. Variations in the amount of volatilized potassium was found to be linked to the content of multiple chemical elements for pure biomass pellets. In the case of NOx emissions, a strong correlation (R² = 0.98) with the nitrogen content of the fuel was found for pure biomass pellets. However, deviations from this linear relationship were observed for trials conducted on mixed biomass pellets, highlighting that the nitrogen content is not the only parameter involved. The work carried out thus made it possible to establish in an original way that synergies can exist in the pellets made of a mixture of biomass residues, leading to beneficial behaviors differing from the direct additivity of the biomass behaviors taken separately. These synergies could allow to mitigate the problems caused by the use of these residues in boilers by ingeniously acting directly on the properties of the fuels without modification of the process.
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https://tel.archives-ouvertes.fr/tel-01972157
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Submitted on : Monday, January 7, 2019 - 3:23:05 PM
Last modification on : Tuesday, April 21, 2020 - 2:06:12 PM
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Brice Piednoir. Comportement en combustion de résidus de biomasse : mise en évidence de synergies par mélange sous forme de granulés. Autre. Université de Perpignan, 2017. Français. ⟨NNT : 2017PERP0066⟩. ⟨tel-01972157⟩

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