Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Estimation of the deprotonation degree of phenolic groups on kraft lignin
Chalmers University of Technology, Sweden; KTH Royal Institute of Technology, Sweden.
Chalmers University of Technology, Sweden; Stora Enso; Sweden.
RISE., Innventia.ORCID-id: 0000-0003-4564-2544
Chalmers University of Technology, Sweden; KTH Royal Institute of Technology, Sweden.
2015 (engelsk)Inngår i: NWBC 2015: The 6th Nordic Wood Biorefinery Conference, Espoo: VTT , 2015, s. 442-449Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Research has been undertaken into the deprotonation degree of the phenolic groups on softwood kraft lignin in black liquor. An attempt was made to mathematically model the ion concentration distributions around lignin fragments in black liquor by studying the possibility of using a modified Poisson-Boltzmann cell model and extending the validity of this model by extrapolating the valid ionic concentration range using the Pitzer method. The model has been utilised to predict the pH dependent deprotonation degree under various conditions that are relevant to the LignoBoost process. It has been demonstrated that the pH and temperature strongly affected the deprotonation degree of phenolic groups on kraft lignin. The effect of the molecular weight of lignin and a small increase in ionic strength on the deprotonation degree was very small in black liquor systems of high ionic strength. It was observed that the pH at the surface of lignin macromolecules was approximately the same in black liquor systems of high ionic strength.

sted, utgiver, år, opplag, sider
Espoo: VTT , 2015. s. 442-449
Emneord [en]
black liquor, ionic charge, ionic strength, kraft lignin, lignin removal process, modelling, phenolics, softwood
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-29111ISBN: 978-951-38-8353-9 (digital)OAI: oai:DiVA.org:ri-29111DiVA, id: diva2:1081598
Konferanse
6th Nordic Wood Biorefinery Conference (NWBC 2015), October 20-22, 2015, Helsinki, Finland
Prosjekter
Chalmers energy initiative
Forskningsfinansiär
Chalmers Energy initiativeTilgjengelig fra: 2017-03-14 Laget: 2017-03-14 Sist oppdatert: 2019-07-10bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Proceedings

Personposter BETA

Sedin, Maria

Søk i DiVA

Av forfatter/redaktør
Sedin, Maria
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric

isbn
urn-nbn
Totalt: 16 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.35.7