Abstract
Kinetic data have been obtained for beech wood pyrolysis. This paper describes experiments in which small cubes of wood were heated under well-controlled conditions. The small size of the cube, large enough to allow the measurement of surface temperature, allows the precise determination of heat transfer to the wood surface, and limits autocatalysis effects and secondary reactions when volatiles escape. Weight loss was recorded and surface temperature was measured. A three-dimensional modelling of heat transfer coupled with endothermic devolatilization permits the determination of the activation energy and the pre-exponential factor. The activation energy E = 120 kJ mol −1 is in good agreement with the literature, but the pre-exponential factor k = 5 × 10 6 s −1 is lower than the value obtained from other studies.
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