Techno-economic evaluation of biofuel production from black liquor by hydrothermal liquefaction

K. Melin (Corresponding author), A. Välimäki, A. Oasmaa, J. Lehtonen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Kraft black liquor, a side product of pulp and paper industry, is available in huge amounts at pulp mills in northern countries. Conversion of black liquor into transportation fuel via hydrothermal liquefaction is a promising pathway, which has been demonstrated in the laboratory scale in the LIGNOHTL project (2013-17)1. In this poster presentation, the techno-economic performance estimate of biocrude production from black liquor based on the measured laboratory scale yields is presented and the importance of different variables on the profitability is illustrated. According to the results, the cost of transportation fuels production from black liquor is roughly 1000 €/ton with mature production technology hence similar range than i.e. for Fischer-Tropsch or Methanol to Gasoline routes from lignocellulosic biomass. However, both the production technology and the profitability could be significantly improved if the organic losses particularly in the washing of the HTL crude product are reduced. Because the process has only been demonstrated in laboratory scale, the assumptions behind the techno-economic analysis particularly product yields should be verified in bigger scale and in continuous reactors.

Original languageEnglish
Title of host publicationProceedings of the 8th Nordic Wood Biorefinery Conference
Subtitle of host publicationNWBC 2018
EditorsEemeli Hytonen, Jessica Vepsalainen
PublisherVTT Technical Research Centre of Finland
ISBN (Electronic)9789513886714
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
Event8th Nordic Wood Biorefinery Conference, NWBC 2018 - Scandic Marina Congress Center, Helsinki, Finland
Duration: 23 Oct 201825 Oct 2018 (Conference website)


Conference8th Nordic Wood Biorefinery Conference, NWBC 2018
Internet address


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