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Optimizing Douglas-fir bark liquefaction in mixtures of glycerol and polyethylene glycol and KOH

2017Journal article Restricted access
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dc.contributor.authorEsteves, Bruno
dc.contributor.authorCruz-Lopes, Luísa
dc.contributor.authorFerreira, José
dc.contributor.authorDomingos, Idalina
dc.contributor.authorNunes, Lina
dc.contributor.authorPereira, Helena
dc.date.accessioned2018-03-26T08:36:15Z
dc.date.available2018-03-26T08:36:15Z
dc.date.issued2017
dc.description.abstractThe outer bark of Douglas-fir (Pseudotsuga menziesii) has a significant amount of cork tissue that may be an important source of chemicals derived from its natural polymers, suberin, cellulose, hemicelluloses and lignin. The present work focuses on the polyalcohol liquefaction of Douglas-fir bark with glycerol and polyethylene glycol (PEG) in order to obtain a liquid that can be further processed to other chemicals and products. The results show that Pseudotsuga bark can be liquefied in a significant percentage in presence of alkali. The best liquefaction yield was obtained with 6% KOH as agents. Although the use of a cosolvent is favorable, good liquefaction yields can also be obtained by glycerol alone. Lower temperatures are favorable as they lead to acceptable liquefaction yields. FTIR-ATR studies showed that all the structural compounds of the bark were attacked and depolymerized. The process tested has a high potential for generation of value-added products from liquefied Douglas-fir bark.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEsteves, B., Cruz-Lopes, L., Ferreira, J., Domingos, I., Nunes, L., & Pereira, H. (2018). Optimizing Douglas-fir bark liquefaction in mixtures of glycerol and polyethylene glycol and KOH. Holzforschung, 72(1), 25–30. https://doi.org/10.1515/hf-2017-0018pt_PT
dc.identifier.doi10.1515/hf-2017-0018pt_PT
dc.identifier.issn1437-434X
dc.identifier.urihttp://hdl.handle.net/10400.19/4870
dc.language.isoengpt_PT
dc.publisherDe Gruyterpt_PT
dc.relation.publisherversionhttps://www.degruyter.com/view/j/hfsg.2018.72.issue-1/hf-2017-0018/hf-2017-0018.xmlpt_PT
dc.subjectCorkpt_PT
dc.subjectFTIRpt_PT
dc.subjectLiquefactionpt_PT
dc.subjectPseudotsuga menziesiipt_PT
dc.subjectSuberinpt_PT
dc.titleOptimizing Douglas-fir bark liquefaction in mixtures of glycerol and polyethylene glycol and KOHpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage30pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage25pt_PT
oaire.citation.titleHolzforschungpt_PT
oaire.citation.volume72pt_PT
person.familyNameEsteves
person.familyNameGonçalves Oliveira Valente da Cruz-Lopes
person.familyNameFerreira
person.familyNameDomingos
person.givenNameBruno
person.givenNameLuísa Paula
person.givenNameJosé
person.givenNameidalina
person.identifier2119255
person.identifier.ciencia-id521B-63A7-B248
person.identifier.ciencia-id7916-0833-5B38
person.identifier.ciencia-idB81E-BE45-E128
person.identifier.ciencia-id7116-E1DE-88E7
person.identifier.orcid0000-0001-6660-3128
person.identifier.orcid0000-0001-6502-7202
person.identifier.orcid0000-0001-7596-8065
person.identifier.orcid0000-0002-4308-1563
person.identifier.ridC-2173-2012
person.identifier.scopus-author-id57202554441
person.identifier.scopus-author-id18133647300
person.identifier.scopus-author-id24281086400
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa3351493-41e8-4758-acae-39e3382d0b04
relation.isAuthorOfPublicationfa1274f5-f7f8-4afd-8ed8-5f988d6c7226
relation.isAuthorOfPublication7d09c228-3415-4272-9299-89c6951565d7
relation.isAuthorOfPublication50134ab7-55eb-4e8a-a5ea-5cc54b1468e3
relation.isAuthorOfPublication.latestForDiscoveryfa1274f5-f7f8-4afd-8ed8-5f988d6c7226

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