Catalytic hydrotreating of black liquor oils

Douglas C. Elliott, Anja Oasmaa

    Research output: Contribution to journalArticleScientificpeer-review

    34 Citations (Scopus)


    Laboratory-scale batch experiments have been completed for testing catalytic hydrotreating as
    a means of upgrading an oil product produced from kraft black liquor. The experiments show that
    sulfided cobalt-molybdenum and nickel-molybdenum catalysts can be used to convert the viscous,
    low-volatility oil into a mixture of hydrocarbons and phenolics at 380 °C and about 1 h residence
    time. Removal of the sodium in the oil by an acid wash before the experiment results in a more
    effective reaction and a higher quality product. Addition of water to the hydrotreating experiment
    can be used as a means to separate the sodium from the upgraded product into a byproduct aqueous
    stream. The upgraded product contains less oxygen and sodium than the black liquor oil and contains
    a larger volatile fraction (distillable under vacuum). Comparison of the operating results and the
    product composition with earlier results in wood-derived oil upgrading shows many similarities.
    Original languageEnglish
    Pages (from-to)102-109
    JournalEnergy & Fuels
    Issue number1
    Publication statusPublished - 1991
    MoE publication typeA1 Journal article-refereed


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