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Pretreatment and cooking of forest residues
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Materials and Production, SICOMP. Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
2019 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 14, no 4, p. 9454-9471Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to investigate the possibility of processing forest residues by chemical delignification preceded by mild steam explosion. The focus was on using soda pulping, due to its simplicity. Kraft cooking was used for comparison to improve the understanding of the separation of the complex yet promising resource. The raw material consisted of chipped branches, bark, and twigs of mixed hardwood and softwood. Analysis of the raw material proved to be challenging due to the presence of a substantial fraction of extractives. Analysis of the pulps showed that the forest residue delignification was faster than that of wood. The effects of steam explosion were evaluated with the help of composition analysis, gel permeation chromatography (GPC) for the molecular weight of lignin, and NMR for the changes in its structure. The impact of steam explosion was found to be limited, possibly due to the relatively small size of the material. 

Place, publisher, year, edition, pages
North Carolina State University , 2019. Vol. 14, no 4, p. 9454-9471
Keywords [en]
Forest residues, Kraft cooking, Pretreatment, Soda cooking, Steam explosion, Delignification, Explosions, Gel permeation chromatography, Hardwoods, Steam, Composition analysis, Forest residue, Gel permeation chromatography (GPC), Mild steam explosions, Mixed hardwoods, Pre-Treatment, Forestry
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40914DOI: 10.15376/biores.14.4.9454-9471Scopus ID: 2-s2.0-85075255626OAI: oai:DiVA.org:ri-40914DiVA, id: diva2:1376779
Note

Funding details: Wallenberg Wood Science Center, WWSC; Funding text 1: The authors are grateful for the support of the Knut and Alice Wallenberg Foundation within the Wallenberg Wood Science Center.

Available from: 2019-12-10 Created: 2019-12-10 Last updated: 2019-12-10Bibliographically approved

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CiteExportLink to record
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