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Modelling of the pyrolysis of biomass particles. Studies on kinetics, thermal and heat transfer effects
Author(s) -
Koufopanos C. A.,
Papayannakos N.,
Maschio G.,
Lucchesi A.
Publication year - 1991
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450690413
Subject(s) - pyrolysis , endothermic process , exothermic reaction , heat transfer , work (physics) , thermodynamics , mass transfer , particle (ecology) , biomass (ecology) , kinetics , chemical kinetics , chemistry , chemical reaction , materials science , chemical engineering , organic chemistry , physics , adsorption , quantum mechanics , engineering , oceanography , geology
The present work provides a rationally‐based model to describe the pyrolysis of a single solid particle of biomass. As the phenomena governing the pyrolysis of a biomass particle are both chemical (primary and secondary reactions) and physical (mainly heat transfer phenomena), the presented model couples heat transport with chemical kinetics. The thermal properties included in the model are considered to be linear functions of temperature and conversion, and have been estimated from literature data or by fitting the model with experimental data. The heat of reaction has been found to be represented by two values: one endothermic, which prevails at low conversions and the other exothermic, which prevails at high conversions. Pyrolysis phenomena have been simulated by a scheme consisting of two parallel reactions and a third reaction for the secondary interactions between charcoal and volatiles. The model predictions are in agreement with experimental data regarding temperature and mass‐loss histories of biomass particles over a wide range of pyrolysis conditions.