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Pilot trials of hemicelluloses extraction prior to thermomechanical pulp production: Part 1

Author(s):

Eric Horn

Year:

2011

Publication type:

Scientific Journal (JRNL)

Primary Station(s):

Forest Products Laboratory

Source:

Tappi journal. Vol. 10, no. 5 (May 2011): p. 21-28.

Description

Pilot data indicate that wood chip pretreatment with oxalic acid reduced the specific energy required to make thermomechanical pulp. A combined oxalic acid/bisulfite treatment resulted in 21% refiner energy savings and 13% increase in brightness for aspen. A low level of oxalic acid treatment was effective for spruce. Energy savings of 30% was observed with no significant change in strength properties. Adding bisulfite did not significantly increase the brightness of the spruce pulp. For pine, the optimum treatment was a moderate level of oxalic acid, which resulted in 34% energy savings and an increase in strength properties. For all of these treatments 1–3 w/w % carbohydrates were recovered, which can be fermented to produce ethanol. The extract sugar solution contained significant quantities of arabinose.

Citation

Houtman, Carl; Horn, Eric. 2011. Pilot trials of hemicelluloses extraction prior to thermomechanical pulp production: Part 1. Tappi Journal. 10(5): 21-28.

Publication Notes

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/38678