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Potential of mild torrefaction for upgrading the wood energy value of different Eucalyptus species
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Orientador(es)
Resumo(s)
Torrefaction is a promising pre-treatment for improving the fuel quality of biomass.
This study examined the effect of a mild torrefaction (from 160 to 230 C) on the heating value,
elemental composition, and thermogravimetric analysis of wood from eight Eucalyptus species
(E. botryoides Sm., E. globulus Labill., E. grandis W.Hill ex Maiden, E. maculata (Hook.) K.D. Hill &
L.A.S.Johnson, E. propinqua Maiden Deane, E. rudis Endl., E. saligna Sm., and E. viminalis Labill.).
The higher heating values (HHV) increased from the initial average of 19 MJ kg1 to 21 MJ kg1 in
the torrefied samples. The carbon content increased from 48.2% to 53.3% and the C/O ratio from 1.08
to 1.35. The torrefied wood samples showed more thermal stability with a shift of the mass loss peaks
to higher temperatures and a higher residual mass at 450 C of 36%, in comparison to 30% of the
untreated samples. Torrefaction concentrated the biomass samples in the more energetic and thermal
resistant components and decreased their sulfur and chlorine content, leading to a better combustion
performance. The wood of the eight Eucalyptus species had a similar behavior and showed quality
improvement. Therefore, torrefaction showed potential as a pre-treatment for eucalyptus biomass
fuel improvement
Descrição
Palavras-chave
Eucalyptus torrefaction high heating value (HHV) thermogravimetric analysis (TGA) elemental composition
Contexto Educativo
Citação
Forests 2018, 9, 535
Editora
MDPI