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Chemical composition and structural features of cellolignin from steam explosion followed by enzymatic hydrolysis of Eucalyptus globulus bark

2024-05Journal article Open access
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dc.contributor.authorMagina, Sandra
dc.contributor.authorMarques, Susana
dc.contributor.authorGírio, Francisco
dc.contributor.authorLourenço, Ana
dc.contributor.authorBarros-Timmons, Ana
dc.contributor.authorEvtuguin, Dmitry V.
dc.date.accessioned2024-04-17T14:03:11Z
dc.date.available2024-04-17T14:03:11Z
dc.date.issued2024-05
dc.description.abstractABSTRACT: Bark is one of the main wastes of the chemical and mechanical processing of Eucalyptus globulus wood. The proposed biochemical processing of bark via saccharification pathway involves steam explosion (SE) pretreatment (severity factor log R0 of 4.22) followed by enzymatic hydrolysis using an enzymatic cocktail composed of cellulolytic and xylanolytic enzymes. Almost 70% cellulose saccharification was achieved. The remaining cellolignin residue (CLEZ) was analysed for its chemical composition and structural features by conventional wet chemistry methods and a series of spectroscopic tools (FTIR-ATR, solid-state CP/MAS C-13 NMR spectroscopy and wide-angle X-ray scattering (WAXS)). The main CLEZ component (about 51%) is acid-insoluble lignin, the chemical composition of which in terms of the ratio of syringyl (S), guaiacyl (G) and p-hydroxyphenyl (H) units (70:28:2) is very close to that in the initial bark. This lignin is highly condensed and structurally associated with condensed tannins, which makes CLEZ recalcitrant to delignification by common methods. About one third of cellulose in eucalyptus bark after SE was inaccessible to enzymatic hydrolysis and remained in the CLEZ. This cellulose, structurally similar to microcrystalline cellulose, is imbedded into the lignin-tannins condensed matrix and extremely difficult to purify. In contrast to cellulose, bark hemicelluloses were effectively removed in enzymatic hydrolysis, with only small amounts (<2%) remaining in CLEZ. Among other CLEZ ingredients, proteins and inorganic/organic salts were the most abundant. The latter includes noticeable amounts of calcium oxalate phytoliths (up to 9%), Fe and Si salts. The eventual application areas of CLEZ are discussed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMagina, Sanda, Marques, Susana, Gírio, Francisco, Lourenço, Ana, Barros-Timmons, Ana & Evtuguin, Dimitry V. (2024) Chemical composition and structural features of cellolignin from steam explosion followed by enzymatic hydrolysis of Eucalyptus globulus bark. In: Industrial Crops & Products, 2024, vol. 211, article nº 118217. https://doi.org/10.1016/j.indcrop.2024.118217pt_PT
dc.identifier.doi10.1016/j.indcrop.2024.118217pt_PT
dc.identifier.issn0926-6690
dc.identifier.urihttp://hdl.handle.net/10400.9/4284
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO-Aveiro Institute of Materials
dc.relationForest Research Centre
dc.relation.publisherversionhttps://doi.org/10.1016/j.indcrop.2024.118217pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectEucalyptus globuluspt_PT
dc.subjectBiomasspt_PT
dc.subjectEnzymatic hydrolysispt_PT
dc.subjectLigninpt_PT
dc.subjectCellulosept_PT
dc.titleChemical composition and structural features of cellolignin from steam explosion followed by enzymatic hydrolysis of Eucalyptus globulus barkpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleForest Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00239%2F2020/PT
oaire.citation.titleIndustrial Crops & Productspt_PT
oaire.citation.volume211pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameSantos Moita de Oliveira Marques
person.familyNameFERREIRA GIRIO
person.familyNameLourenco
person.givenNameSusana
person.givenNameFRANCISCO MANUEL
person.givenNameAna
person.identifier359723
person.identifier.ciencia-idAA13-4693-4DCE
person.identifier.ciencia-idD51D-09A4-A2DC
person.identifier.ciencia-id411B-FD38-7C96
person.identifier.orcid0000-0001-9153-4080
person.identifier.orcid0000-0002-5376-8430
person.identifier.orcid0000-0003-4896-344X
person.identifier.ridA-5901-2011
person.identifier.scopus-author-id36877743000
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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