Analysis of wood structural changes under thermal radiation
Analysis of wood structural changes under thermal radiation
Experiment is carried out to observe the structural changes of cellulosic materials exposed to thermal radiation. To quantitatively analyze the results of pyrolyzed wood samples, simple geometric models are proposed to include both shrinkage and cracking. The shrinkage factors consider each direction of three-dimensional geometry, as well as the overall volume. The cracking coefficients include the depth and volume of cracks. The structural changes of the solid are characterized during the pyrolysis by varying the external heat flux and the species of wood. Formulas for calculation of crack depths are derived based on the experimental results for softwood and hardwood. The expressions of cracking can be incorporated into pyrolysis models to include the effects of cracks on heat and mass transfer during wood pyrolysis.
1081-1088
Shen, D.K.
b814587b-86a7-4d9c-b165-dbdb44265d94
Gu, Sai
a6f7af91-4731-46fe-ac4d-3081890ab704
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b
Bridgwater, A.V.
dfb0fe37-6c36-4806-bce5-a847bea52248
26 January 2009
Shen, D.K.
b814587b-86a7-4d9c-b165-dbdb44265d94
Gu, Sai
a6f7af91-4731-46fe-ac4d-3081890ab704
Luo, Kai H.
86f52a13-fdcd-40e4-8344-a6fe47c4e16b
Bridgwater, A.V.
dfb0fe37-6c36-4806-bce5-a847bea52248
Shen, D.K., Gu, Sai, Luo, Kai H. and Bridgwater, A.V.
(2009)
Analysis of wood structural changes under thermal radiation.
Energy and Fuels, 23 (2), .
(doi:10.1021/ef800873k).
Abstract
Experiment is carried out to observe the structural changes of cellulosic materials exposed to thermal radiation. To quantitatively analyze the results of pyrolyzed wood samples, simple geometric models are proposed to include both shrinkage and cracking. The shrinkage factors consider each direction of three-dimensional geometry, as well as the overall volume. The cracking coefficients include the depth and volume of cracks. The structural changes of the solid are characterized during the pyrolysis by varying the external heat flux and the species of wood. Formulas for calculation of crack depths are derived based on the experimental results for softwood and hardwood. The expressions of cracking can be incorporated into pyrolysis models to include the effects of cracks on heat and mass transfer during wood pyrolysis.
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Published date: 26 January 2009
Organisations:
Engineering Sciences
Identifiers
Local EPrints ID: 147413
URI: http://eprints.soton.ac.uk/id/eprint/147413
ISSN: 0887-0624
PURE UUID: ca6bc1c5-f912-43a9-80be-3a2df2d7a3dc
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Date deposited: 26 Apr 2010 08:29
Last modified: 14 Mar 2024 01:00
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Contributors
Author:
D.K. Shen
Author:
Sai Gu
Author:
Kai H. Luo
Author:
A.V. Bridgwater
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