Stabilisation of polysaccharides during alkaline pretreatment of wood combined with enzyme-supported extractions in a biorefinery
2015 (English)In: Journal of wood chemistry and technology, ISSN 0277-3813, E-ISSN 1532-2319, Vol. 35, no 2, 91-101 p.Article in journal (Refereed) Published
Specific enzymes have been demonstrated to increase the possibilities for extracting wood polymers. Enzymatic treatment requires an open wood structure, which was achieved by extended impregnation of the wood. However, some of the hemicelluloses, primarily glucomannan, and lignin were lost during the impregnation. To improve the carbohydrate yield, three glucomannan modification agents: sodium borohydride, polysulphide and anthraquinone, were used, which increased the yields of the impregnated materials from 76.6% to 89.6%, 81.3% and 80.0%, respectively. Through the use of additives, most of the glucomannan could be retained in the wood while still allowing the enzymes to penetrate the wood and attack the polymers. The additives also increased the extraction yield from 9 to 12% w/w wood. Gamanase treatment prior to the extraction increased the extraction yield to 14%. Of the three stabilising agents, sodium borohydride was the most efficient, providing the highest extraction yields.
Place, publisher, year, edition, pages
2015. Vol. 35, no 2, 91-101 p.
extended impregnation, peeling reaction, sodium borohydride (NaBH4), polysulphide (PS), anthraquinone (AQ), extraction, biorefinery
Research subject Fibre and Polymer Science
IdentifiersURN: urn:nbn:se:kth:diva-150392DOI: 10.1080/02773813.2013.875041ISI: 000345585100001ScopusID: 2-s2.0-84913587206OAI: oai:DiVA.org:kth-150392DiVA: diva2:742754
FunderKnut and Alice Wallenberg Foundation, 8102
Updated from manuscript to article in journal.
QC 201501152014-09-022014-09-022015-01-19Bibliographically approved