Cristin-resultat-ID: 1145442
Sist endret: 28. november 2014, 10:37
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Effects of wet torrefaction on reactivity and kinetics of wood under air combustion conditions

Bidragsytere:
  • Quang Vu Bach
  • Khanh-Quang Tran
  • Øyvind Skreiberg
  • Roger Antoine Khalil og
  • N. Anh Phan

Tidsskrift

Fuel
ISSN 0016-2361
e-ISSN 1873-7153
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Publisert online: 2014
Trykket: 2014
Volum: 137
Sider: 375 - 383
Open Access

Importkilder

Scopus-ID: 2-s2.0-84906824678

Beskrivelse Beskrivelse

Tittel

Effects of wet torrefaction on reactivity and kinetics of wood under air combustion conditions

Sammendrag

This work continues our assessment of wet torrefaction for energy applications, looking at effects of the process parameters (temperature, holding time and pressure) on the reactivity and intrinsic kinetics of wood under air combustion conditions. Woody materials, Norway spruce and birch, were wet torrefied in various conditions (temperature: 175, 200, 225 °C; holding time: 10, 30, 60 min; and pressure: 15.54, 70, 160 bar). The reactivity of the treated and untreated woods was thermogravimetrically examined under a synthetic air environment (21% O2 and 79% N2 in volume). A four-pseudo-component model with different reaction orders was adopted for kinetic modelling and extracting the kinetic parameters. The results showed that when increasing either torrefaction temperature or holding time, the torrefied woods behaved more char-like than the raw fuels. However, pressure did not show significant effect on the reactivity. Relatively longer char combustion stages and higher conversion rates (up to 0.5 × 10−3 s−1) were observed for the woods after torrefaction. The activation energy was decreased for hemicellulose and char, but increased for cellulose after torrefaction, whereas the trend for lignin is not clear. In addition, the hemicellulose mass fraction decreased after torrefaction (from 0.15 to 0.05 for spruce and from 0.23 to 0.06 for birch). The amount of char in the torrefied woods increased gradually with increasing torrefaction temperature or holding time (from 0.24 to 0.40 for spruce, and from 0.18 to 0.34 for birch). Copyright © 2014 Published by Elsevier Ltd.

Bidragsytere

Quang Vu Bach

  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og prosessteknikk ved Norges teknisk-naturvitenskapelige universitet

Quang Khanh Tran

Bidragsyterens navn vises på dette resultatet som Khanh-Quang Tran
  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og prosessteknikk ved Norges teknisk-naturvitenskapelige universitet

Øyvind Skreiberg

  • Tilknyttet:
    Forfatter
    ved Termisk energi ved SINTEF Energi AS

Roger Antoine Khalil

  • Tilknyttet:
    Forfatter
    ved Termisk energi ved SINTEF Energi AS

N. Anh Phan

  • Tilknyttet:
    Forfatter
    ved Newcastle University
1 - 5 av 5