http://www.cnr.it/ontology/cnr/individuo/prodotto/ID238594
Temperatures of Wood Particles in a Hot Sand Bed Fluidized by Nitrogen (Articolo in rivista)
- Type
- Label
- Temperatures of Wood Particles in a Hot Sand Bed Fluidized by Nitrogen (Articolo in rivista) (literal)
- Anno
- 2003-01-01T00:00:00+01:00 (literal)
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- Colomba Di Blasi, Carmen Branca (literal)
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- Rivista
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- Dipartimento di Ingegneria Chimica, Universita´ di Napoli \"Federico II\" P.le V. Tecchio, 80125 Napoli, Italy (literal)
- Titolo
- Temperatures of Wood Particles in a Hot Sand Bed Fluidized by Nitrogen (literal)
- Abstract
- The thermal history undergone by cylindrical beech wood particles, injected in a sand bed fluidized by nitrogen has been recorded. Experiments have been carried out by varying particle
diameter (d ) 2-10 mm) and bed temperature (Tr ) 712-1107 K). The rate of volatile release becomes significant for temperatures above 625-650 K and is always completed for temperatures
below 675-825 K. Devolatilization causes a strong reduction in the heating rate which, at the particle center and for the most intense reaction activity, is comprised between 0 and 25 K/s. For
the conditions typical of fast pyrolysis (bed temperatures of 800-1100 K and particle sizes of 2-6 mm), the yields of char are 10-18% and the devolatilization times (corresponding to a
conversion of 95%) 18-45s. Furthermore, in qualitative agreement with previous analyses carried out for coal particles, these are well predicted by an empirical power-law relation: tv )
0.8e1525/Trd1.2 s, over the entire range of experimental conditions examined. (literal)
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- Autore CNR
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