Influence of long-term heat treatment of kraft black liquor on lignin precipitation and material properties

Thomas Michael Pichler*, Silvia Margareta Maitz, Marlene Kienberger

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

In the present study, the influence of long-term heat treatment of black liquor with focus on a subsequent lignin precipitation process was investigated. The well-known CO2 approach to precipitate a certain amount of lignin from heat-treated black liquor was studied within defined thermal conditions. Several important characteristics of lignin such as molar mass and functional groups were analysed. Viscosity and buffer capacity of black liquor were also studied. Results showed a reduction in lignin yield as a result of a decrease in molar mass and lignin demethylation after the heat treatment. The acid consumption during precipitation was found to be higher after the heat treatment.
Originalspracheenglisch
Seiten (von - bis)286-292
Seitenumfang7
FachzeitschriftHolzforschung
Jahrgang74
Ausgabenummer3
DOIs
PublikationsstatusVeröffentlicht - 2020

ASJC Scopus subject areas

  • !!Biomaterials

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