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

Source: Tappi Journal May 2011 pp. 21-28

Author(s)Houtman, Carl; Horn, Eric

Publication Year: 2011  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4709-1A

Abstract: 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.

Keywords: Pulping, hemicellulose, oxalic acid, pretreatment, wood chips, Populus, Picea, sugars, Pinus, carbohydrates, energy conservation. pine, aspen, spruce, thermomechanical pulping, pulp and paper processes, biorefining, wood extractives, chips, bisulfite, brightness, paper strength, arabinose, pretreatment

Publication Review Process: Formally Refereed

File size: 232 kb(s)

Date posted: 07/05/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 39205
Current FPL Scientist associated with this product
Houtman, Carl J.
Chemical Engineer
  

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