CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Extraction of hemicelluloses from fiberized spruce wood

S. Azhar ; G. Henriksson ; Hans Theliander (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; M. E. Lindstrom
Carbohydrate Polymers (0144-8617). Vol. 117 (2015), p. 19-24.
[Artikel, refereegranskad vetenskaplig]

A novel mechanical pre-treatment method was used to separate the wood chips into fiber bundles in order to extract high molecular weight wood polymers. The mechanical pre-treatment involved chip compression in a conical plug-screw followed by defibration in a fiberizer. The fiberized wood was treated with hot water at various combinations of time and temperature in order to analyze the extraction yield of hemicelluloses at different conditions. Nearly 6 mg/g wood of galactoglucomannan was obtained at 90 degrees C/120min which was about three times more than what could be extracted from wood chips. The extracted carbohydrates had molecular weight ranging up to 60 kDa. About 10% of each of the extracted material had a molecular weight above 30 kDa. The extraction liquor could also be reused for consecutive extractions with successive increase in the extraction yield of hemicelluloses.

Nyckelord: Spruce (Picea abies), Mechanical pre-treatment, Fiberized wood, Hemicelluloses



Denna post skapades 2015-01-15. Senast ändrad 2015-01-22.
CPL Pubid: 210844

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik

Ämnesområden

Kemi

Chalmers infrastruktur