Birch wood pre-hydrolysis vs pulp post-hydrolysis for the production of xylan-based compounds and cellulose for viscose application

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorBorrega, Marc
dc.contributor.authorLarsson, Per Tomas
dc.contributor.authorAhvenainen, Patrik
dc.contributor.authorCeccherini, Sara
dc.contributor.authorMaloney, Thaddeus
dc.contributor.authorRautkari, Lauri
dc.contributor.authorSixta, Herbert
dc.contributor.departmentDepartment of Forest Products Technology
dc.contributor.departmentRISE Bioeconomy
dc.contributor.departmentUniversity of Helsinki
dc.contributor.departmentDepartment of Bioproducts and Biosystems
dc.date.accessioned2018-05-22T14:52:26Z
dc.date.available2018-05-22T14:52:26Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2019-02-25
dc.date.issued2018-06-15
dc.description.abstractHydrothermal treatments of birch wood and kraft pulp were compared for their ability to extract the xylan and produce viscose-grade pulp. Water post-hydrolysis of kraft pulp produced a high-purity cellulosic pulp with lower viscosity but higher cellulose yield than traditional pre-hydrolysis kraft pulping of wood. Post-hydrolysis of pulp also increased the crystallite dimensions and degree of crystallinity in cellulose, and promoted a higher extent of fibril aggregation. The lower specific surface area in post-hydrolyzed pulps, derived from their larger fibril aggregates, decreased the accessibility of –OH groups. However, this lower accessibility did not seem to decrease the pulp reactivity to derivatizing chemicals. In the aqueous side-stream, the xylose yield was similar in both pre- and post-hydrolysates, although conducting post-hydrolysis of pulp in a flow-through system enabled the recovery of high purity and molar mass (∼10 kDa) xylan for high-value applications.en
dc.description.versionPeer revieweden
dc.format.extent10
dc.format.extent212-221
dc.format.mimetypeapplication/pdf
dc.identifier.citationBorrega , M , Larsson , P T , Ahvenainen , P , Ceccherini , S , Maloney , T , Rautkari , L & Sixta , H 2018 , ' Birch wood pre-hydrolysis vs pulp post-hydrolysis for the production of xylan-based compounds and cellulose for viscose application ' , Carbohydrate Polymers , vol. 190 , pp. 212-221 . https://doi.org/10.1016/j.carbpol.2018.02.064en
dc.identifier.doi10.1016/j.carbpol.2018.02.064
dc.identifier.issn0144-8617
dc.identifier.issn1879-1344
dc.identifier.otherPURE UUID: f0524855-3cf7-428b-afe0-e852f6eda7c3
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/f0524855-3cf7-428b-afe0-e852f6eda7c3
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85042777891&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/20722606/Borrega_et_al_Birch_wood_2018_Carbohydrate_Polymers.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/31255
dc.identifier.urnURN:NBN:fi:aalto-201805222695
dc.language.isoenen
dc.relation.ispartofseriesCarbohydrate Polymersen
dc.relation.ispartofseriesVolume 190en
dc.rightsopenAccessen
dc.subject.keywordCellulose
dc.subject.keywordDissolving pulp
dc.subject.keywordHydrothermal treatment
dc.subject.keywordViscose
dc.subject.keywordXylan
dc.titleBirch wood pre-hydrolysis vs pulp post-hydrolysis for the production of xylan-based compounds and cellulose for viscose applicationen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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