Devolatilization of wood particles in a hot fluidized bed: Product yields and conversion rates

Spherical wood particles of various well-defined diameters were fed into a bed of fluidized olivine maintained at temperatures in the range of 700–900 °C. The fluidizing gas was either nitrogen or a steam–nitrogen mixture, and the wooden spheres were introduced in two different ways: on to the bed s...

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Bibliographic Details
Published in:Biomass & bioenergy 2008-12, Vol.32 (12), p.1123-1129
Main Authors: Rapagnà, S., Mazziotti di Celso, G.
Format: Article
Language:English
Subjects:
Applied sciences
Biomass
Energy
European hop-hornbeam
Exact sciences and technology
Fluidized bed
Gasification
Natural energy
Olivine
Ostrya carpinifolia
Pyrolysis
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Summary:Spherical wood particles of various well-defined diameters were fed into a bed of fluidized olivine maintained at temperatures in the range of 700–900 °C. The fluidizing gas was either nitrogen or a steam–nitrogen mixture, and the wooden spheres were introduced in two different ways: on to the bed surface and deep into the bed itself. The resulting gas, tar and char yields were found to be influenced by the method of feed introduction as well as by the bed temperature, fluidizing gas composition and wood particle diameter. The total devolatilization time was correlated by means of a power law expression similar to that used for coal devolatilization and having the advantage of being able to fit well the experimental data over the full temperature range in both nitrogen and steam–nitrogen atmospheres.
ISSN:0961-9534
1873-2909
DOI:10.1016/j.biombioe.2008.02.010