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Chemical effects of a mild torrefaction on the wood of eight Eucalyptus species

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dc.contributor.authorAraújo, Solange de Oliveira
dc.contributor.authorNeiva, Duarte M.
dc.contributor.authorGominho, Jorge
dc.contributor.authorEsteves, Bruno
dc.contributor.authorPereira, Helena
dc.date.accessioned2017-06-20T15:38:14Z
dc.date.available2017-06-20T15:38:14Z
dc.date.issued2017
dc.description.abstractThe torrefaction is a thermal pre-treatment to improve biomass quality for biofuel applications. In this study, the effects of a mild torrefaction (T) on eight euca- lypt species ( Eucalyptus botryoides, E. globulus, E. grandis, E. maculata, E. propinqua, E. rudis, E. saligna and E. vimi- nalis ) have been compared. Namely, the mass loss (ML), the equilibrium moisture content (EMC), density and chemical composition were determined and FTIR spectra were recorded of the initial and torrefied woods (TWs). The average ML was 11% and the heat-treated woods had an overall 10% density decrement. All the TW had 50% lower EMC compared to untreated wood samples (W). Elemen- tal composition showed that carbon content increased from 48% to 53% and the oxygen/carbon ratio decreased from 0.80 to 0.65. The chemical changes induced by T included an increment of extractives, a 20% higher lignin content and a 16% lower holocellulose content in relation to W. The hemicelluloses modification is manifested by a decrease of xylose, galactose, and acetyl groups in TWs. The fourier transform infrared (FTIR) spectra of the different wood species were very similar, and reflected in a uniform manner the chemical changes upon T. Because of the similar reaction of the eucalypt species, they can also be used in form of mixed eucalypt feedstock as biofuel.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAraújo, S. de O., Neiva, D. M., Gominho, J., Esteves, B., & Pereira, H. (2017). Chemical effects of a mild torrefaction on the wood of eight Eucalyptus species. Holzforschung, 71(4). https://doi.org/10.1515/hf-2016-0079pt_PT
dc.identifier.doi10.1515/hf-2016-0079pt_PT
dc.identifier.issn1437-434X
dc.identifier.urihttp://hdl.handle.net/10400.19/4617
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherDe Gruyterpt_PT
dc.relation.publisherversionhttps://www.degruyter.com/view/j/hfsg.2017.71.issue-4/hf-2016-0079/hf-2016-0079.xml?format=INTpt_PT
dc.subjectbiomasspt_PT
dc.subjectchemical analysispt_PT
dc.subjectdensitypt_PT
dc.subjectelemental analysispt_PT
dc.subjectEucalyptuspt_PT
dc.subjectFTIRpt_PT
dc.subjecthemicellulosespt_PT
dc.subjectmass losspt_PT
dc.subjectspecies variabilitypt_PT
dc.subjecttorrefactionpt_PT
dc.subjectwoodpt_PT
dc.titleChemical effects of a mild torrefaction on the wood of eight Eucalyptus speciespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage298pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage291pt_PT
oaire.citation.titleHolzforschungpt_PT
oaire.citation.volume71pt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT

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