CFD modelling of the fast pyrolysis of biomass in fluidised bed reactors: Modelling the impact of biomass shrinkage
CFD modelling of the fast pyrolysis of biomass in fluidised bed reactors: Modelling the impact of biomass shrinkage
The fluid–particle interaction and the impact of shrinkage on pyrolysis of biomass inside a 150 g/h fluidised bed reactor is modelled. Two 500 m in diameter biomass particles are injected into the fluidised bed with different shrinkage conditions. The two different conditions consist of (1) shrinkage equal to the volume left by the solid devolatilization, and (2) shrinkage parameters equal to approximately half of particle volume. The effect of shrinkage is analysed in terms of heat and momentum transfer as well as product yields, pyrolysis time and particle size considering spherical geometries. The Eulerian approach is used to model the bubbling behaviour of the sand, which is treated as a continuum. Heat transfer from the bubbling bed to the discrete biomass particle, as well as biomass reaction kinetics are modelled according to the literature. The particle motion inside the reactor is computed using drag laws, dependent on the local volume fraction of each phase. FLUENT 6.2 has been used as the modelling framework of the simulations with the whole pyrolysis model incorporated in the form of user defined function (UDF).
cfd, fluidized bed, fast pyroysis, heat transfer, biomass shrinkage
417-427
Papadikis, Konstantinos
7626c31b-2ac0-46ab-9a73-1d28b347b1d9
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Bridgwater, A.V.
dfb0fe37-6c36-4806-bce5-a847bea52248
1 July 2009
Papadikis, Konstantinos
7626c31b-2ac0-46ab-9a73-1d28b347b1d9
Gu, S.
a6f7af91-4731-46fe-ac4d-3081890ab704
Bridgwater, A.V.
dfb0fe37-6c36-4806-bce5-a847bea52248
Papadikis, Konstantinos, Gu, S. and Bridgwater, A.V.
(2009)
CFD modelling of the fast pyrolysis of biomass in fluidised bed reactors: Modelling the impact of biomass shrinkage.
Computational Materials Science, 149 (1-3), .
(doi:10.1016/j.cej.2009.01.036).
Abstract
The fluid–particle interaction and the impact of shrinkage on pyrolysis of biomass inside a 150 g/h fluidised bed reactor is modelled. Two 500 m in diameter biomass particles are injected into the fluidised bed with different shrinkage conditions. The two different conditions consist of (1) shrinkage equal to the volume left by the solid devolatilization, and (2) shrinkage parameters equal to approximately half of particle volume. The effect of shrinkage is analysed in terms of heat and momentum transfer as well as product yields, pyrolysis time and particle size considering spherical geometries. The Eulerian approach is used to model the bubbling behaviour of the sand, which is treated as a continuum. Heat transfer from the bubbling bed to the discrete biomass particle, as well as biomass reaction kinetics are modelled according to the literature. The particle motion inside the reactor is computed using drag laws, dependent on the local volume fraction of each phase. FLUENT 6.2 has been used as the modelling framework of the simulations with the whole pyrolysis model incorporated in the form of user defined function (UDF).
More information
Published date: 1 July 2009
Keywords:
cfd, fluidized bed, fast pyroysis, heat transfer, biomass shrinkage
Identifiers
Local EPrints ID: 149223
URI: http://eprints.soton.ac.uk/id/eprint/149223
ISSN: 0927-0256
PURE UUID: 7a521805-c66e-4594-8e70-2f3ff0919ae6
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Date deposited: 04 May 2010 16:17
Last modified: 14 Mar 2024 01:05
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Contributors
Author:
Konstantinos Papadikis
Author:
S. Gu
Author:
A.V. Bridgwater
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