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Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides

2015Journal article Open access
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dc.contributor.authorVilcocq, Léa
dc.contributor.authorSpinola, Vitor
dc.contributor.authorMoniz, Patricia
dc.contributor.authorDuarte, Luís C.
dc.contributor.authorCarvalheiro, Florbela
dc.contributor.authorFernandes, César
dc.contributor.authorCastilho, Paula C.
dc.date.accessioned2016-04-06T15:33:36Z
dc.date.available2016-04-06T15:33:36Z
dc.date.issued2015
dc.description.abstractThe hydrolysis of hemicellulosic oligosaccharides (OS) was investigated using acid-activated clays (prepared from natural Porto Santo montmorillonite clay) as catalysts. Acid activation was performed in HCl solution or with aluminium exchange. The clay catalysts were characterized by XRD, N2 adsorption isotherms, CEC, FTIR, titration of acid sites in water and adsorption of sugars and disaccharides. They were tested for the hydrolysis of a model compound, maltose, and of OS-rich liquor from rice straw fractionation. The HCl-activated clays were the most efficient catalysts for maltose hydrolysis. It was demonstrated that the hydrolysis of OS into monomer sugars over a clay catalyst is technically feasible and that this reaction leads to the selective removal of glucose, arabinose and acetic acid side groups from the OS structure, thus yielding simpler xylo-oligosaccharide chains. Furthermore, no significant conversion of monomer sugars into furans was observed.pt_PT
dc.identifier.citationVilcocq, L.; Spinola, V.; Moniz, P.; Duarte, Luís C.; Carvalheiro, F.; Fonseca, C.; Castilho, Paula C. - Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides. In: Catalysis Science & Technology, 2015, Vol. 5, p. 4072-4080pt_PT
dc.identifier.doi10.1039/c5cy00195apt_PT
dc.identifier.issn2044-4753
dc.identifier.urihttp://hdl.handle.net/10400.9/2910
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherThe Royal Society of Chemistrypt_PT
dc.relationPTDC/AGRALI/ 122261/2010pt_PT
dc.relationPTDC/CTM-CER/1121295/2010pt_PT
dc.relationPEst-OE/ QUI/UI0674/2011pt_PT
dc.relation.publisherversionhttp://dx.doi.org/10.1039/c5cy00195apt_PT
dc.subjectOligosaccharidespt_PT
dc.subjectHemicellulosept_PT
dc.subjectHydrolysispt_PT
dc.subjectGreen chemistrypt_PT
dc.subjectAcid catalysispt_PT
dc.titleAcid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharidespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage4080pt_PT
oaire.citation.startPage4072pt_PT
oaire.citation.titleCatalysis Science and Technologypt_PT
oaire.citation.volume5pt_PT
person.familyNameMoniz
person.familyNameDuarte
person.familyNameCarvalheiro
person.givenNamePatricia
person.givenNameLuís
person.givenNameFlorbela
person.identifier59799
person.identifier.ciencia-idEC1A-602C-C41D
person.identifier.ciencia-id7F15-9BC9-79AA
person.identifier.ciencia-id4016-9476-B97D
person.identifier.orcid0000-0002-7085-674X
person.identifier.orcid0000-0001-5820-3669
person.identifier.orcid0000-0002-0270-4832
person.identifier.ridC-1430-2008
person.identifier.ridL-1860-2014
person.identifier.scopus-author-id37085399000
person.identifier.scopus-author-id56649966600
person.identifier.scopus-author-id6603247136
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication690f95eb-e63c-4f9b-8f92-92e03b7bc500
relation.isAuthorOfPublication844a40eb-c914-4b16-9888-d58f7beb22e0
relation.isAuthorOfPublicationcdbcb5eb-94de-49eb-920b-089980c34cbf
relation.isAuthorOfPublication.latestForDiscovery690f95eb-e63c-4f9b-8f92-92e03b7bc500

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