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Fractionation of macroalgae carbohydrates using hydrothermal and dilute inorganic salt pretreatments to produce oligosaccharides and furans

2025-07Journal article Open access
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datacite.subject.fosEngenharia e Tecnologia::Biotecnologia Industrial
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorMartins, Pedro L.
dc.contributor.authorAndrade, Cristiana
dc.contributor.authorDuarte, Luís
dc.contributor.authorReis, Alberto
dc.contributor.authorPereira, Helena
dc.contributor.authorCarvalheiro, Florbela
dc.date.accessioned2025-09-17T11:49:15Z
dc.date.available2025-09-17T11:49:15Z
dc.date.issued2025-07
dc.description.abstractABSTRACT: Furans are among the most important compounds derived from biomass, providing conversion pathways for sustainable alternatives to petroleum-based fuels and materials. Furfural, 5-hydroxymethylfurfural (5-HMF), and 5-methylfurfural (5-MF) are furans that can be obtained by carbohydrate dehydration under acidic conditions at elevated temperature and pressure. One of the mechanisms to produce these compounds from lignocellulosic materials relies on prior fractionation of biomass carbohydrates and further dehydration catalysis. However, this is a costly and technically challenging method and it would be advantageous to develop a one-pot conversion mechanism that facilitates simultaneous biomass fractionation and conversion to furans. Ulva lactuca is an alga that has the advantage of being lignin-free and rich in glucose, rhamnose, and xylose, which are ideal for producing 5-HMF, 5-MF, and furfural, respectively. The high diversity of sugar constituents is also relevant for the production of added-value oligosaccharides. Catalysis with inorganic salts has been reported as a successful tool for biomass upgrading to furans when combined with hydrothermal pretreatments, and could provide a cheap and environmentally friendly one-step methodology for furan production. This study therefore aimed to investigate the effect of hydrothermal and dilute acid pretreatments, as well as treatment with inorganic salt solutions (ferric chloride, ferric nitrate, and aluminium nitrate) on U. lactuca biomass to produce oligosaccharides, monosaccharides, and furans (furfural, 5-HMF, and 5-MF). These methods resulted in a maximum sugar solubilization of 65% in non-salt-assisted hydrothermal pretreatments and 84% in salt-assisted hydrothermal pretreatments, with inorganic salt catalysis also resulting in 100% xylose, 36% glucose, and 46% rhamnose conversion to the respective furans.eng
dc.identifier.citationMartins, P.L., Andrade, C., Duarte, L.C., Reis, A., Pereira, H. & Carvalheiro, F. (2025). Fractionation of macroalgae carbohydrates using hydrothermal and dilute inorganic salt pretreatments to produce oligosaccharides and furans. In: Biofuels, Bioproducts and Biorefining (Biofpr), July 2025, [Early Access]. https://doi.org/10.1002/bbb.70020
dc.identifier.doi10.1002/bbb.70020
dc.identifier.eissn1932-1031
dc.identifier.issn1932-104X
dc.identifier.urihttp://hdl.handle.net/10400.9/6055
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relationInnovative valorisation of microalgal by-products as feedstock for biorefineries
dc.relationBiofuels Research Infrastructure for Sharing Knowledge II
dc.relationBiomass and Bioenergy Research Infrastructure
dc.relation.hasversionhttps://scijournals.onlinelibrary.wiley.com/doi/10.1002/bbb.70020
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiomass
dc.subjectBiorefineries
dc.subjectOligosaccharides
dc.subjectLignocellulosic biomass
dc.titleFractionation of macroalgae carbohydrates using hydrothermal and dilute inorganic salt pretreatments to produce oligosaccharides and furanseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInnovative valorisation of microalgal by-products as feedstock for biorefineries
oaire.awardTitleBiofuels Research Infrastructure for Sharing Knowledge II
oaire.awardTitleBiomass and Bioenergy Research Infrastructure
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F121704%2F2016/PT
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/731101/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9444 - RNIIIE/PINFRA%2F22059%2F2016/PT
oaire.citation.titleBiofuels, Bioproducts and Biorefining
oaire.fundingStreamH2020
oaire.fundingStream9444 - RNIIIE
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameDuarte
person.familyNameReis
person.familyNamePereira
person.familyNameCarvalheiro
person.givenNameLuís
person.givenNameAlberto
person.givenNameHelena
person.givenNameFlorbela
person.identifier59799
person.identifier385852
person.identifier.ciencia-id7F15-9BC9-79AA
person.identifier.ciencia-id4016-9476-B97D
person.identifier.orcid0000-0001-5820-3669
person.identifier.orcid0000-0002-1405-9981
person.identifier.orcid0000-0002-5393-4443
person.identifier.orcid0000-0002-0270-4832
person.identifier.ridC-1430-2008
person.identifier.ridL-1860-2014
person.identifier.scopus-author-id56649966600
person.identifier.scopus-author-id7103251554
person.identifier.scopus-author-id6603247136
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
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