Journal
FUEL
Volume 83, Issue 1, Pages 81-87Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0016-2361(03)00220-5
Keywords
wood; kinetics; modeling; devolatilization; combustion
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Weight loss curves of two wood species (beech and Douglas fir) have been measured in air for four heating rates between 5-40 K/min and a final temperature of 873 K. A four-step series mechanism describes well the details of the thermogravimetric curves of the devolatilization/combustion process. The rates of the first three reactions are linear in the solid mass fraction and the activation energies are 106, 226 and 114 kJ/mol, respectively. The fourth step presents a power-law dependence (n = 1.54) on the solid mass fraction and an activation energy of 183 kJ/mol. Pre-exponential factors and stoichiometric coefficients take into account the differences between the two wood species. (C) 2004 Elsevier Ltd. All rights reserved.
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