Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Predicting CTMP bleachability using wood shavings
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
Metso Paper Sundsvall AB, SE-851 94, Sundsvall, Sweden.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
2011 (English)In: 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC, 2011, Vol. 1, 613-616 p.Conference paper, Published paper (Refereed)
Abstract [en]

To predict the brightness reduction in a chemithermomechanical process as well as the bleachability of pulps produced from different species of wood raw materials there are, at present, no shortcuts available. Pulps have to be manufactured in pilot or mill scale and bleached; evaluating and predicting the bleachability has consequently been very resource consuming and thus expensive - until now! Due to this, we have used a laboratory method based on 60 × 60 mm wood shavings making it possible to predict the bleachability of primarily chemithermomechanical pulps but also other mechanical pulps. Our experiments showed that retention time and impregnation temperature appears to have no impact on the final brightness of birch shavings. When being subjected to a simulated chemithermomechanical pulp process, eucalyptus exhibited an increase in chromophore content before the bleaching stage. In addition, eucalyptus suffered from severe alkaline darkening. After the bleaching stage, the alkaline darkening diminished. A higher retention temperature resulted in lower brightness of the eucalyptus shavings compared to when using a lower retention temperature. Birch reached the highest final brightness levels and had a higher overall yield too.

Place, publisher, year, edition, pages
2011. Vol. 1, 613-616 p.
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-16752Scopus ID: 2-s2.0-84855713005OAI: oai:DiVA.org:miun-16752DiVA: diva2:545180
Conference
16th International Symposium on Wood, Fiber and Pulping Chemistry, ISWFPC;Tianjin;8 June 2011through10 June 2011;Code88003
Available from: 2012-08-17 Created: 2012-08-17 Last updated: 2013-12-12Bibliographically approved

Open Access in DiVA

fulltext(270 kB)329 downloads
File information
File name FULLTEXT01.pdfFile size 270 kBChecksum SHA-512
0f3536899f1f2945beb8260be190927c13df3967e08badf6cd5b77348da305ecddd882aacfcd5c5cbbb72e658bbb7000acd1126198b0db1853aeae38d526ed77
Type fulltextMimetype application/pdf

Other links

Scopushttp://www.scopus.com/inward/record.url?eid=2-s2.0-84855713005&partnerID=40&md5=fe95d9bfcb0edeaf4c103438b92f6453

Search in DiVA

By author/editor
Fjellström, HelenaEngstrand, PerLogenius, Louise
By organisation
Department of Natural Sciences, Engineering and Mathematics
Chemical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 329 downloads
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

urn-nbn

Altmetric score

urn-nbn
Total: 991 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf