Controlling powdered fuel combustion at low temperature in a new entrained flow reactor

Van de Steene Laurent, Salvador Sylvain, Charnay G.. 2000. Controlling powdered fuel combustion at low temperature in a new entrained flow reactor. Combustion Science and Technology, 159 (1) : 255-279.

Résumé : If low temperatures of 800-1000°C are used for the combustion of powdered solid fuels (coal or waste) energy can be produced while at the same time emissions of atmospheric pollutants are minimised. We have developed and precisely characterised an apparatus to determine the kinetic parameters of the potentially limiting reactions (devolatilisation and solid residue oxidation) involved during high heating-rate combustion. The gas phase chemical composition, and structural changes in particles accompanying the combustion can also be followed. Calculation of characteristic time constants and simulation by Computational Fluid Dynamics were necessary to establish heat and mass transfer conditions in which intrinsic kinetic parameters can be assessed with a maximum accuracy. An experimental parametric study of a bituminous coal combustion then demonstrates the accuracy that could be reached. The individual effects of devolatilisation temperature, of atmosphere oxygen con-tent and of particles diameter on the combustion progress are quantitatively characterised.

Mots-clés Agrovoc : combustion, température, gaz, composition chimique

Classification Agris : P06 - Sources d'énergie renouvelable

Auteurs et affiliations

• Van de Steene Laurent, CIRAD-FORET-BOIS (FRA) ORCID: 0000-0003-4737-3667
• Salvador Sylvain, Ecole des mines d'Albi (FRA)
• Charnay G., IMFT (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/522632/)

Métriques

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