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dc.contributor.authorLehto, Joni
dc.contributor.authorAlén, Raimo
dc.date.accessioned2016-08-25T04:44:22Z
dc.date.available2016-08-25T04:44:22Z
dc.date.issued2016
dc.identifier.citationLehto, J., & Alén, R. (2016). Organic material dissolved during oxygen-alkali pulping of hot-water-extracted spruce sawdust. <i>BioResources</i>, <i>11</i>(3), 7322-7333. <a href="https://doi.org/10.15376/biores.11.3.7322-7333" target="_blank">https://doi.org/10.15376/biores.11.3.7322-7333</a>
dc.identifier.otherCONVID_26121282
dc.identifier.otherTUTKAID_70677
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/51055
dc.description.abstractUntreated and hot-water-extracted (HWE) Norway spruce (Picea abies) sawdust was cooked using the sulfur-free oxygen-alkali (OA) method under the following conditions: temperature, 170 °C; liquor-to-wood ratio, 5:1 L/kg; and NaOH charge, 19% on the oven-dry sawdust. In comparison with earlier studies conducted with birch sawdust, the spruce cooking yield data, together with the amount of the pulp rejects (78% to 86% for reference pulps from the initial feedstock and 73% to 83% for pulps from the HWE feedstock), revealed that the pretreatment stage prior to spruce OA pulping caused different effects on pulping performance. The analyses of the three main compound groups (i.e., lignin, volatile acids, and hydroxy acids) in black liquor indicated that slightly higher contents (25.5 to 45.9 g/L) of dissolved lignin were detected in black liquors originating from the HWE sawdust than in the black liquors from the reference material (27.2 to 39.6 g/L). In contrast, considerably lower (~20% decrease) volatile acid contents and similar or slightly decreased hydroxy acids contents were detected in the black liquors from the HWE sawdust.
dc.language.isoeng
dc.publisherNorth Carolina State University
dc.relation.ispartofseriesBioResources
dc.subject.otherautohydrolysis
dc.subject.otherbiorefining
dc.subject.otherhot-water extraction
dc.subject.otherhydroxy acids
dc.subject.otheroxygen-alkali pulping
dc.subject.othervolatile acids
dc.titleOrganic material dissolved during oxygen-alkali pulping of hot-water-extracted spruce sawdust
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201607153627
dc.contributor.laitosKemian laitosfi
dc.contributor.laitosDepartment of Chemistryen
dc.contributor.oppiaineSoveltava kemiafi
dc.contributor.oppiaineApplied Chemistryen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-07-15T09:15:06Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange7322-7333
dc.relation.issn1930-2126
dc.relation.numberinseries3
dc.relation.volume11
dc.type.versionpublishedVersion
dc.rights.copyright© the Authors, 2016. This is an open access article published by North Carolina State University.
dc.rights.accesslevelopenAccessfi
dc.subject.ysomustalipeä
dc.subject.ysoligniini
dc.subject.ysometsäkuusi
jyx.subject.urihttp://www.yso.fi/onto/yso/p24480
jyx.subject.urihttp://www.yso.fi/onto/yso/p19011
jyx.subject.urihttp://www.yso.fi/onto/yso/p5552
dc.relation.doi10.15376/biores.11.3.7322-7333


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