Parameters Affecting the Cross-flow Filtration of Dissolved LignoBoost Kraft Lignin
2015 (English)In: Journal of wood chemistry and technology, ISSN 0277-3813, E-ISSN 1532-2319, Vol. 36, no 1, 1-8 p.Article in journal (Other academic) Published
In the kraft pulping process, the lignin-containing by-product kraft black liquor is currently combusted as an energy source. LignoBoost is a technique that extracts lignin from kraft black liquor, resulting in a lignin-lean black liquor, which is returned to the process, and an extracted kraft lignin. To facilitate the use of the extracted kraft lignin in high-value applications, it can be refined via fractionation to produce a more homogeneous starting raw material. Hence, the aim of this study is to investigate the behavior of dissolved softwood kraft lignin during cross-flow filtration. The effects of the lignin concentration, pH, and ionic strength on the fractionation of the dissolved lignin during cross-flow filtration are investigated. The results indicate that large amounts of low-molecular-weight kraft lignin can be produced from solutions having a low lignin concentration. Furthermore, the effects of pH and ionic strength on the fractionation of low-molecular-weight lignin are identified within the studied ranges.
Place, publisher, year, edition, pages
Taylor & Francis Group, 2015. Vol. 36, no 1, 1-8 p.
Cross-flow filtration, ultrafiltration, kraft lignin, low molecular weight
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-143952DOI: 10.1080/02773813.2015.1025284ISI: 000364850100001ScopusID: 2-s2.0-84944871166OAI: oai:DiVA.org:kth-143952DiVA: diva2:709863
QC 201512142014-04-032014-04-032015-12-15Bibliographically approved