Analyses of wood components in mild steam explosion liquors from spruce
2014 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 29, no 4, 557-566 p.Article in journal (Refereed) PublishedText
Steam explosion at mild conditions is an intriguing pre-treatment method for future biorefineries. Here, mild steam explosion liquors, i.e. the condensed steam generated from water-impregnated and NaBH4-impregnated spruce at various steam explosion conditions, are comprehensively characterized. The characterization includes several chromatographic techniques along with nuclear magnetic resonance (NMR), in order to determine relative abundances of solubilized lignin, carbohydrates, and acetate content. The findings show that the main components in the liquors originated from hemicelluloses and, to some extent, wood extractives. Arabinose side substituents of arabinoglucuronoxylan were cleaved early during the steam treatment. The amount of (galacto) glucomannan in the liquors increased from 16% for the sample from the 4 bar (0.4 MPa) treatment, to 23% for the sample from the 7 bar treatment. The effects of different conditions on wood during NaBH4-treatment were also investigated. For this treatment, it was found that the degree of deacetylation increased at harsher conditions.
Place, publisher, year, edition, pages
AB SVENSK PAPPERSTIDNING , 2014. Vol. 29, no 4, 557-566 p.
Biorefinery, Hemicelluloses, Mild steam explosion, Norway spruce
IdentifiersURN: urn:nbn:se:kth:diva-179098ISI: 000346146900002OAI: oai:DiVA.org:kth-179098DiVA: diva2:881467
QC 201512102015-12-102015-12-102015-12-10Bibliographically approved