Weight loss dynamics of wood chips under fast radiative heating

Citation
C. Di Blasi et al., Weight loss dynamics of wood chips under fast radiative heating, J AN AP PYR, 57(1), 2001, pp. 77-90
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
ISSN journal
0165-2370 → ACNP
Volume
57
Issue
1
Year of publication
2001
Pages
77 - 90
Database
ISI
SICI code
0165-2370(200101)57:1<77:WLDOWC>2.0.ZU;2-4
Abstract
The role of reaction temperature is investigated on the degradation dynamic s of wood chips of different varieties, exposed to radiative heat fluxes in the range 31-80 kW m(-2). Average heating rates vary from about 20 to 120 K min(-1), with steady temperatures between 600 and 900 K. At low temperatu res, softwoods (redwood, fir, pine), on the one hand, and hardwoods (beech, chestnut), on the other, present dynamics quantitatively similar, apart fr om the lower devolatilization rate of chestnut with respect to beech wood. On the whole, the softwood devolatilization rate is slower and attains its maximum at longer times (higher temperatures). As the reaction temperature is increased, it is essentially the ratio between the percentage of holocel lulose and the other components in the wood chemical composition which main ly determine the degradation characteristics. (C) 2001 Elsevier Science B.V . All rights reserved.