1999•Chalmers Publication Library (Chalmers University of Technology)Requires access
Kinetics of fluidized bed combustion of wood pellets
Bo G Leckner, Karl-Martin Hansson, Claes Tullin, A. V. Borodulya, A.V. Dikalenko, G.I. Palchonok
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Abstract
Devolatilization and char combustion of a single wood pellet in a fluidized bed has been studied. The effect of operation parameters (bed temperature, bed particle size, oxygen concentration) and pellet characteristics has been investigated. A simplified analytical model of heat-transfer controlled pyrolysis has been developed to interpret the measured volatiles release time. The model predictions are in a good agreement with the experimental data, provided that the initial physical properties of the pellet are used. The model can be used to estimate the devolatilization times in other combustion systems. Kinetic parameters of char combustion are obtained, based on the measured burnout times and simple model considerations. The physical properties of wood pellets need further study.