Analyses of wood components in mild steam explosion liquors from spruce
Artikel i vetenskaplig tidskrift, 2014

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.

Hemicelluloses

Mild steam explosion

Biorefinery

Norway spruce

Författare

Kerstin Jedvert

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Merima Hasani

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

T. Wells

Organisation okänd

Hans Theliander

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Nordic Pulp and Paper Research Journal

0283-2631 (ISSN)

Vol. 29 4 557-566

Ämneskategorier

Materialteknik

DOI

10.3183/NPPRJ-2014-29-04-p557-567