The influence of industrial black liquor on the delignification rate in the kraft cooking
2007 (English)In: Journal of Pulp and Paper Science (JPPS), ISSN 0826-6220, Vol. 33, no 4, 240-245 p.Article in journal (Refereed) Published
The effect of dissolved wood components in industrial black liquor on the rate of delignification in softwood kraft cooking has been studied The results show that, when industrial black liquor was added, the delignification rate increased significantly during the bulk phase and decreased during the residual phase. A softwood black liquor was fractionated with ceramic membranes with various cut-offs, to see the way the addition of various molecular weight fractions of the black-liquor lignin affected the delignification rate. The results show that the delignification rate is dependent more on the content of phenolic groups than on the size of the lignin fragments. However, a low molecular-weight lignin fraction has a higher content of phenolic groups than a high molecular-weight fraction does. These results may explain one reason for the positive effect of adding industrial black liquor to the bulk phase of a softwood kraft cook.
Place, publisher, year, edition, pages
2007. Vol. 33, no 4, 240-245 p.
kraft pulping, delignification, black liquors, phenol groups
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-5433ISI: 000254544400009ScopusID: 2-s2.0-43049172002OAI: oai:DiVA.org:kth-5433DiVA: diva2:9796
Tidigare titel: The influence of industrial black liquor on the delignification rate in the kraft cook Uppdaterad från manuskript till artikel: 20100920 QC 201009202006-03-082006-03-082014-11-04Bibliographically approved