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Rapeseed Straw Biorefinery Process
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden; University Skövde, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.ORCID iD: 0000-0002-8992-3623
KTH Royal Institute of Technology, Sweden.
2019 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 7, no 1, p. 790-801Article in journal (Refereed) Published
Abstract [en]

A rapeseed straw biorefinery process was demonstrated with more than 50% of the straw recovered as products. Xylan with a weight-average molecular weight of 56 760 g/mol was extracted in an alkaline step. The straw residue was subjected to soda pulping, resulting in cellulose-rich fibers and a lignin-rich liquid fraction. The lignin contained syringyl and guaiacyl aromatic structural units in a 1/0.75 ratio. The cellulose pulp was bleached, resulting in a cellulose fraction of 85% purity and a crystallinity index (CI) of 83%. Two grades of nanocellulose, CNF and CNC, were isolated from the bleached pulp. The CNF was very heterogeneous in size with an average diameter of 4 nm and an average length of 1177 nm. The CNC had an average diameter of 6 nm and an average particle length of 193 nm. CNF and CNC had good thermal stability and an aspect ratio of 294 and 32, respectively.

Place, publisher, year, edition, pages
American Chemical Society , 2019. Vol. 7, no 1, p. 790-801
Keywords [en]
Biorefinery, Bleached pulp, Canola straw, Lignin; Nanocellulose, hydrothermal extraction, xylan
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-36956DOI: 10.1021/acssuschemeng.8b04420Scopus ID: 2-s2.0-85058836615OAI: oai:DiVA.org:ri-36956DiVA, id: diva2:1274605
Funder
Swedish Research Council Formas, 2013-844
Note

cited By 0; Article in Press

Available from: 2019-01-02 Created: 2019-01-02 Last updated: 2019-07-05Bibliographically approved

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Brännvall, Elisabet

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