Influences of physical properties on biomass devolatilization characteristics

A detailed transport model is used to predict the effects of the widely variable physical properties (density, thermal conductivity, permeability to gas flow, specific heat capacity) of the feedstock on the convective-radiant pyrolysis of cellulosic fuels. For conversion in a thermally thick regime...

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Bibliographic Details
Published in:Fuel (Guildford) 1997-08, Vol.76 (10), p.957-964
Main Author: Di Blasi, Colomba
Format: Article
Language:English
Subjects:
Applied sciences
Biomass
biomass pyrolysis
Energy
Exact sciences and technology
mathematical modelling
Natural energy
physical-property effects
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Summary:A detailed transport model is used to predict the effects of the widely variable physical properties (density, thermal conductivity, permeability to gas flow, specific heat capacity) of the feedstock on the convective-radiant pyrolysis of cellulosic fuels. For conversion in a thermally thick regime (intra-particle heat transfer control), it is found that variations in the physical properties mainly affect the activity of secondary reactions of tar vapours and the conversion time. The highest sensitivity is associated with the biomass density and the char thermal conductivity. Physical properties weakly affect only the conversion time in the thermally thin regime (external heat transfer control). Applications of these findings in reactor design and operation are discussed.
ISSN:0016-2361
1873-7153
DOI:10.1016/S0016-2361(97)00096-3