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Lignin depolymerization/repolymerization and its critical role for delignification of aspen wood by steam explosion
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2007 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 98, no 16, 3061-3068 p.Article in journal (Refereed) Published
Abstract [en]

Steam explosion is an important process for the fractionation of biomass components. In order to understand the behaviour of lignin under the conditions encountered in the steam explosion process, as well as in other types of steam treatment, aspen wood and isolated lignin from aspen were subjected to steam treatment under various conditions. The lignin portion was analyzed using NMR and size exclusion chromatography as major analytical techniques. Thereby, the competition between lignin depolymerization and repolymerization was revealed and the conditions required for these two types of reaction identified. Addition of a reactive phenol, 2-naphthol, was shown to inhibit the repolymerization reaction strongly, resulting in a highly improved delignification by subsequent solvent extraction and an extracted lignin of uniform structure.

Place, publisher, year, edition, pages
2007. Vol. 98, no 16, 3061-3068 p.
Keyword [en]
aspen wood, steam explosion, delignification, depolymerization, repolymerization, molecular-weight distribution, water-soluble fraction, populus-tremuloides, hemicelluloses solubilization, simulated autohydrolysis, aromatic additives, structural-changes, auto-hydrolysis
Identifiers
URN: urn:nbn:se:kth:diva-16759DOI: 10.1016/j.biortech.2006.10.018ISI: 000247759200012Scopus ID: 2-s2.0-34247141555OAI: oai:DiVA.org:kth-16759DiVA: diva2:334802
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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