The effect of hydrothermal liquefaction of black liquor in bio-oil quality

Kristian Melin (Corresponding author), Alexi Välimäki, Anja Oasmaa, Juha Lehtonen

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

    2 Citations (Scopus)

    Abstract

    This work addresses optimization of the hydrothermal liquefaction (HTL) black liquors originating from Kraft pulp mills using glycerol as a hydrogen donor, and sodium hydroxide as alkali at different reaction temperatures employing different dry solids contents of black liquors. The aim was to find optimal conditions for producing high-quality bio-oil. The desired HTL product properties were: the product is a fluid at room temperature, high heating value (HHV), low oxygen content, low molecular weight, as well as low sodium and ash content. The impact of wheat straw lignin addition to black liquor was also studied. The best bio-oil quality was obtained at the conditions of black liquor dry solids of 34 wt.-%, 12 wt.-% of sodium hydroxide, glycerol 59 wt.-% and temperature 360 °C.
    Original languageEnglish
    Title of host publicationEuropean Biomass Conference and Exhibition Proceedings
    PublisherETA-Florence Renewable Energies
    Pages1144-1145
    Number of pages2
    ISBN (Print)978-88-89407-19-6
    DOIs
    Publication statusPublished - May 2019
    MoE publication typeA4 Article in a conference publication
    Event27th European Biomass Conference and Exhibition, EUBCE 2019 - Lisbon, Portugal
    Duration: 27 May 201930 May 2019

    Publication series

    SeriesEuropean Biomass Conference and Exhibition Proceedings
    ISSN2282-5819

    Conference

    Conference27th European Biomass Conference and Exhibition, EUBCE 2019
    Country/TerritoryPortugal
    CityLisbon
    Period27/05/1930/05/19

    Keywords

    • Biofuel
    • Liquefaction
    • Liquid biofuel
    • Paper production
    • Quality
    • Thermochemical conversion

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