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Reactivity of syringyl and guaiacyl lignin units and delignification kinetics in the kraft pulping of eucalyptus globulus wood using Py-Gc-Ms/FID

2012-11Journal article Restricted access
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dc.contributor.authorLourenço, Ana
dc.contributor.authorGominho, Jorge
dc.contributor.authorV Marques, A
dc.contributor.authorPereira, Helena
dc.date.accessioned2015-09-08T15:24:55Z
dc.date.available2015-09-08T15:24:55Z
dc.date.issued2012-11
dc.description.abstractEucalyptus globulus sapwood and heartwood showed no differences in lignin content (23.0% vs. 23.7%) and composition: syringyl-lignin (17.9% vs. 18.0%) and guaiacyl-lignin (4.8% vs. 5.2%). Delignification kinetics of S- and G-units in heartwood and sapwood was investigated by Py-GC–MS/FID at 130, 150 and 170 °C and modeled as double first-order reactions. Reactivity differences between S and G-units were small during the main pulping phase and the higher reactivity of S over G units was better expressed in the later pulping stage. The residual lignin composition in pulps was different from wood or from samples in the initial delignification stages, with more G and H-units. S/G ratio ranged from 3 to 4.5 when pulp residual lignin was higher than 10%, decreasing rapidly to less than 1. The S/H was initially around 20 (until 15% residual lignin), decreasing to 4 when residual lignin was about 3%.por
dc.identifier.citationLOURENÇO, A.; [et al] – Reactivity of syringyl and guaiacyl lignin units and delignification kinetics in the kraft pulping of eucalyptus globulus wood using Py-Gc-Ms/FID. Bioresource Technology. ISSN: 0960-8524. Vol. 123 (2012), pp. 296-302por
dc.identifier.doi10.1016/j.biortech.2012.07.092
dc.identifier.issn0960-8524
dc.identifier.urihttp://hdl.handle.net/10400.21/5120
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relationFCT - SFRH/BD/40060/2007
dc.relationFEDER/POCI 2010
dc.relationStrategic Project - UI 239 - 2011-2012
dc.subjectEucalyptus Globuluspor
dc.subjectLignin Compositionpor
dc.subjectS/G Ratiopor
dc.subjectPyrolysispor
dc.subjectDelignificationpor
dc.titleReactivity of syringyl and guaiacyl lignin units and delignification kinetics in the kraft pulping of eucalyptus globulus wood using Py-Gc-Ms/FIDpor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 239 - 2011-2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAGR-CFL%2F110419%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0239%2F2011/PT
oaire.citation.endPage302por
oaire.citation.startPage296por
oaire.citation.titleBioresource Technologypor
oaire.citation.volume123por
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMarques
person.givenNameAntónio
person.identifier.orcid0000-0001-7421-6363
person.identifier.scopus-author-id7202134785
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationb3d0c7ab-dc57-45a9-a86b-6f99a6232f34
relation.isAuthorOfPublication.latestForDiscoveryb3d0c7ab-dc57-45a9-a86b-6f99a6232f34
relation.isProjectOfPublicationde388752-22dc-49cf-898b-003528d6c58d
relation.isProjectOfPublication05bb310d-cd38-43f1-8300-ea62f413ad81
relation.isProjectOfPublication.latestForDiscovery05bb310d-cd38-43f1-8300-ea62f413ad81

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