Author(s)

R.G. Bautista-Margulis & R.G. Siddal

Abstract

Modelling of volatiles combustion in the lean-phase of a calorimetric fluidized bed coal combustor R.G. Bautista-Margulis", R.G. Siddal^ "Institute de Investigaciones Electricas, Division Fuentes de Energia, Departamento Sistemas de Combustion, A. P. ^75, Cuernavaca - Morelos, Mexico ^Department of Mechanical and Process Engineering, University of Sheffield, P. 0. Box ABSTRACT A simplified mathematical model, based on Solomon's [1] kinetic approach coupled with the bed hydrodynamics and a volatiles evolution region within the bed, has been formulated here to carry out a parametric study with the experimental results obtained from a calorimetric fluidized bed combustor (FBC). Good agreement between the model and experimental data has been found, suggesting that the evolution of volatiles (for coal diameters, d^ less than 5 mm) is mechanistically controlled by both diffusion and chemical kinetics, while their combustion is largely governed by the mixing process o

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