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Effects of hot water pre-extraction on surface properties of bagasse soda pulp

2013Journal article Open access
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dc.contributor.authorCordeiro, Nereida
dc.contributor.authorAshori, Alireza
dc.contributor.authorHamzeh, Yahya
dc.contributor.authorFaria, Marisa
dc.date.accessioned2021-05-03T10:06:10Z
dc.date.available2021-05-03T10:06:10Z
dc.date.issued2013
dc.description.abstractIn this work, the effects of hot water pre-extraction of depithed bagasse on the soda pulping and surface properties were studied. The conditions of hot water pre-extraction were: maximum temperature 170 °C, heat-up time 90 min, time at maximum temperature 10 min, and solid to liquor ratio (S:L) 1:8. Consequently, the pre-extracted and un-extracted bagasse chips were subjected to soda pulping at 160 °C for 1h with 11, 14 and 17% active alkali charge and an S:L of 1:5. The results showed that the hot water pre-extraction increased bagasse surface texture porosity by hemicellulose degradation. Therefore, the delignification was faster for pulping of pre-extracted samples. At a certain charge of alkali, pre-extracted samples showed higher screened yield and lower Kappa number. For instance, at 17% alkali charge, pre-extracted bagasse gave 11.3% higher pulp yield compared with the un-extracted ones. Inverse gas chromatography (IGC) results showed that the hot water pre-extraction changed the active sites on the bagasse surface, decreasing the dispersive energy and the basicity character, and affected the particle morphology. The pulping process decreased the hydrophobicity and the basicity of the bagasse surface. The surfaces of un-extracted and pre-extracted bagasse pulps had similar properties but different morphology. The pulps present higher surface area and permeability with more reactive capacity.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCordeiro, N., Ashori, A., Hamzeh, Y., & Faria, M. (2013). Effects of hot water pre-extraction on surface properties of bagasse soda pulp. Materials Science and Engineering: C, 33(2), 613-617.pt_PT
dc.identifier.doi10.1016/j.msec.2012.10.005pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3342
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHot water pre-extractionpt_PT
dc.subjectInverse gas chromatography (IGC)pt_PT
dc.subjectBagassept_PT
dc.subjectPulpingpt_PT
dc.subjectSurface propertiespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleEffects of hot water pre-extraction on surface properties of bagasse soda pulppt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage617pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage613pt_PT
oaire.citation.titleMaterials Science and Engineering: Cpt_PT
oaire.citation.volume33pt_PT
person.familyNamecordeiro
person.familyNameFaria
person.givenNamenereida
person.givenNameMarisa Camacho Gonçalves
person.identifier1612636
person.identifier.ciencia-id521A-0F62-EA39
person.identifier.ciencia-idD716-6F48-AD0E
person.identifier.orcid0000-0001-6006-3415
person.identifier.orcid0000-0002-9158-6961
person.identifier.ridO-2253-2019
person.identifier.scopus-author-id7004319456
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3d02b657-c48c-4f56-813a-1284b81960f3
relation.isAuthorOfPublication57ef72f0-8e40-4853-b4ab-416884e127fa
relation.isAuthorOfPublication.latestForDiscovery3d02b657-c48c-4f56-813a-1284b81960f3

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