Influence of torrefaction on the devolatilization and oxidation kinetics of wood (Articolo in rivista)

Type
Label
  • Influence of torrefaction on the devolatilization and oxidation kinetics of wood (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • M. Brostrom, A. Nordin, L. Pommer, C. Branca, C. Di Blasi (2012)
    Influence of torrefaction on the devolatilization and oxidation kinetics of wood
    in Journal of analytical and applied pyrolysis (Print)
    (literal)
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  • M. Brostrom, A. Nordin, L. Pommer, C. Branca, C. Di Blasi (literal)
Pagina inizio
  • 100 (literal)
Pagina fine
  • 109 (literal)
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  • 96 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Energy Technology and Thermal Process Chemistry, Umeå University, S-901 87 Umeå, Sweden Istituto di Ricerche sulla Combustione, C.N.R., P.le V. Tecchio, 80125 Napoli, Italy Dipartimento di Ingegneria Chimica, Università degli Studi di Napoli \"Federico II\", P.le V. Tecchio, 80125 Napoli, Italy (literal)
Titolo
  • Influence of torrefaction on the devolatilization and oxidation kinetics of wood (literal)
Abstract
  • Devolatilization and oxidation kinetics of torrefied wood have been studied by evaluating thermogravimetric curves measured in nitrogen and air at various heating rates. Samples consist of Norway spruce wood chips torrefied at several process temperatures and residence times. Data about untreated wood have also been obtained for comparison. Measured curves are well predicted by means of a five-reaction mechanism, consisting of three devolatilization reactions for the pseudo-components hemicellulose, cellulose and lignin and, in air, of two additional reactions for char devolatilization and combustion. The torrefaction pre-treatment only requires model modifications in the amounts of volatiles generated from the decomposition of pseudo-components, indicating that only their relative percentages and not their reactivities are modified. On the other hand, a slightly different thermal stability is found for the char generated from torrefied wood, which results in higher activation energy and lower reaction order for the oxidation step. Hence torrefaction conditions can affect the subsequent conversion characteristics of the char product. (literal)
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