Change search
ReferencesLink to record
Permanent link

Direct link
Production of value added chemicals from xylan extraction in a Kraft pulp mill and the effect on pulp quality
Smurfit Kappa Kraftliner AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Show others and affiliations
2008 (English)Conference paper, Presentation (Other academic)
Abstract [en]

In the Kraft process hemicelluloses are lost in the cooking procedure to the black liquor stream, which is subsequently burnt in the recovery boiler to recover cooking chemicals and to produce steam and energy. Hemicelluloses have a low heating value compared to lignin and therefore recovery of hemicelluloses at an earlier stage of the Kraft process followed by biochemical conversionintohighvalue-conversion intohighvalue-into high value-added products might offer a muchbettereconomicopportunity.much better economic opportunityIn collaboration with the research and development department of Smurfit Kappa Kraftliner AB, Piteå, Sweden, alkali and water extractions of birch wood were performed under conditions compatible with the Kraft process, at different times, temperatures and alkali charges. The extraction conditions were set in a range suitable with the current pulp process at Smurfit Kappa Kraftliner. TherequirementsforprocessThe requirements for process configurations, based on either hot water or alkali extraction were also explored. ThexylanyieldsfromdifferentextractiontrialswereThe xylan yields from different extraction trials were measured and the chips from those extraction trials were cooked, refined and turned into sheets of paper. The effects on paper quality were compared with a reference pulp made from the same wooden chips. Recovered xylans from water extracted birch wood chips were subjected to secondary hydrolysis, enzymatic or sulphuricacid.sulphuric acidDetoxification of the hydrolysate with active carbon and regulation of pH were performed before fermentation. FermentationofthexyloseFermentation of the xylose hydrolysate to succinic acid was demonstrated by the use of thethe succinic acid producer Escherichia coli AFP184.

Place, publisher, year, edition, pages
Research subject
Biochemical Process Engineering
URN: urn:nbn:se:ltu:diva-40054Local ID: f0733770-bae6-11dd-b223-000ea68e967bOAI: diva2:1013577
Symposium on Biotechnology for Fuels and Chemicals : 04/05/2008 - 07/05/2008
Godkänd; 2008; Bibliografisk uppgift: Sider: 145(102); 20081125 (jonhel)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

Open Access in DiVA

fulltext(12 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 12 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Helmerius, JonasRova, UlrikaBerglund, KrisHodge, David
By organisation
Sustainable Process Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link