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Pretreatment and Cooking of Forest Residues
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden.
Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden.;RISE Res Inst Sweden, Div Mat & Prod RISE SICOMP AB, Box 104, SE-43122 Molndal, Sweden..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden.ORCID iD: 0000-0002-2120-6513
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 UNIV DEPT WOOD & PAPER SCI , 2019. Vol. 14, no 4, p. 9454-9471
Keywords [en]
Forest residues, Steam explosion, Pretreatment, Kraft cooking, Soda cooking
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-264873DOI: 10.15376/biores.14.4.9454-9471ISI: 000493997400132Scopus ID: 2-s2.0-85075255626OAI: oai:DiVA.org:kth-264873DiVA, id: diva2:1379829
Note

QC 20191217

Available from: 2019-12-17 Created: 2019-12-17 Last updated: 2019-12-17Bibliographically approved

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Theliander, Hans

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