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Parameters Affecting the Cross-Flow Filtration of Dissolved LignoBoost Kraft Lignin

Mikaela Helander ; Tuve Mattsson (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; Hans Theliander (Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik) ; Mikael E. Lindström
Journal of wood chemistry and technology (0277-3813). Vol. 36 (2016), 1, p. 1.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Cross-flow filtration, kraft lignin, low molecular weight, ultrafiltration



Denna post skapades 2015-12-11. Senast ändrad 2015-12-30.
CPL Pubid: 227995

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Skogsindustriell kemiteknik

Ämnesområden

Pappers-, massa- och fiberteknik

Chalmers infrastruktur