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dc.contributor.authorLehto, Joni
dc.contributor.authorLouhelainen, Jarmo
dc.contributor.authorHuttunen, Marko
dc.contributor.authorAlén, Raimo
dc.date.accessioned2017-05-17T12:28:35Z
dc.date.available2019-05-05T21:35:17Z
dc.date.issued2017
dc.identifier.citationLehto, J., Louhelainen, J., Huttunen, M., & Alén, R. (2017). Spectroscopic analysis of hot-water- and dilute-acid-extracted hardwood and softwood chips. <i>Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy</i>, <i>184</i>, 184-190. <a href="https://doi.org/10.1016/j.saa.2017.05.010" target="_blank">https://doi.org/10.1016/j.saa.2017.05.010</a>
dc.identifier.otherCONVID_26991299
dc.identifier.otherTUTKAID_73713
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/54001
dc.description.abstractHot-water and dilute sulfuric acid pretreatments were performed prior to chemical pulping for silver/white birch (Betula pendula/B. pubescens) and Scots pine (Pinus sylvestris) chips to determine if varying pretreatment conditions on the original wood material were detectable via attenuated total reflectance (ATR) infrared spectroscopy. Pretreatment conditions varied with respect to temperature (130 °C and 150 °C) and treatment time (from 30 min to 120 min). The effects of the pretreatments on the composition of wood chips were determined by ATR infrared spectroscopy. The spectral data were compared to those determined by common wood chemistry analyses to evaluate the suitability of ATR spectroscopy method for rapid detection of changes in the wood chemical composition caused by different pretreatment conditions. In addition to determining wood species-dependent differences in the wood chemical composition, analytical results indicated that most essential lignin- and carbohydrates-related phenomena taking place during hot-water and acidic pretreatments could be described by applying this simple spectral method requiring only a small sample amount and sample preparation. Such information included, for example, the cleavage of essential lignin bonds (i.e., mainly β-O-4 linkages in guaiacyl and syringyl lignin) and formation of newly condensed lignin structures under different pretreatment conditions. Carbohydrate analyses indicated significant removal of hemicelluloses (especially hardwood xylan) and hemicelluloses-derived acetyl groups during the pretreatments, but they also confirmed the highly resistant nature of cellulose towards mild pretreatments.
dc.languageeng
dc.language.isoeng
dc.publisherElsevier Science
dc.relation.ispartofseriesSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
dc.subject.otherATR spectroscopy
dc.subject.otherautohydrolysis
dc.subject.otherdilute acid
dc.subject.otherpretreatment
dc.titleSpectroscopic analysis of hot-water- and dilute-acid-extracted hardwood and softwood chips
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201705152336
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.updated2017-05-15T06:15:04Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange184-190
dc.relation.issn1386-1425
dc.relation.numberinseries0
dc.relation.volume184
dc.type.versionacceptedVersion
dc.rights.copyright© 2017 Published by Elsevier B.V. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber
dc.subject.ysoesikäsittely
dc.subject.ysokemia
dc.subject.ysoliuotus
dc.subject.ysoinfrapunatekniikka
dc.subject.ysopuu (luonnonmateriaalit)
dc.subject.ysohydrolyysi
dc.subject.ysomassanvalmistus
jyx.subject.urihttp://www.yso.fi/onto/yso/p18089
jyx.subject.urihttp://www.yso.fi/onto/yso/p1801
jyx.subject.urihttp://www.yso.fi/onto/yso/p9032
jyx.subject.urihttp://www.yso.fi/onto/yso/p9787
jyx.subject.urihttp://www.yso.fi/onto/yso/p16542
jyx.subject.urihttp://www.yso.fi/onto/yso/p13369
jyx.subject.urihttp://www.yso.fi/onto/yso/p12560
dc.relation.doi10.1016/j.saa.2017.05.010
dc.relation.funderMaj ja Tor Nesslingin Säätiöfi
dc.relation.funderMaj ja Tor Nessling Foundationen
jyx.fundinginformationFinancial support from the Maj and Tor Nessling Foundation (number 201700063) (Joni Lehto) is gratefully acknowledged.


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