http://www.cnr.it/ontology/cnr/individuo/prodotto/ID235338
PARALLEL- AND SERIES-REACTION MECHANISMS OF WOOD AND CHAR COMBUSTION (Articolo in rivista)
- Type
- Label
- PARALLEL- AND SERIES-REACTION MECHANISMS OF WOOD AND CHAR COMBUSTION (Articolo in rivista) (literal)
- Anno
- 2004-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Carmen BRANCA and Colomba Di BLASI (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Dipartimento Ingegneria Chimica, Università degli Studi di Napoli \"Federico II\" (literal)
- Titolo
- PARALLEL- AND SERIES-REACTION MECHANISMS OF WOOD AND CHAR COMBUSTION (literal)
- Abstract
- Thermogravimetric curves in air of beech wood and char, ob tained from
con ven tional py rol y sis of beech wood at a lab o ra tory scale, have been
re-ex am ined us ing dif fer ent ki netic mod els. Multi-step re ac tion mech a -
nisms, con sist ing of ei ther four (wood) or two (char) re ac tions are needed
for ac cu rate pre dic tions of weight loss curves. In the case of wood, three re -
ac tions are lin ear in the re ac tant mass frac tion whereas the fourth step
pres ents a power-law de pend ence. A lin ear re ac tion for devolatilization
and a non-lin ear re ac tion for com bus tion are used for the weight loss curves
of char. It has been found that ac ti va tion en er gies and pre-ex po nen tial fac -
tors are in vari ant with se ries- or par al lel-re ac tions, pro vid ing changes in
the stoichiometric co ef fi cients. Fur ther more, the ac ti va tion en er gies of the
two re ac tions oc cur ring at higher tem per a tures in the four-step mech a nism
(wood) and those of the two-step mech a nism (char) are the same. Thus,
pre-ex po nen tial fac tors and re ac tion or der take into account variations in
the char reactivity derived from different pyrolysis conditions. (literal)
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- Autore CNR
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