Catalytic hydrotreating of black liquor oils

Douglas C. Elliott, Anja Oasmaa

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)

Abstract

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
Volume5
Issue number1
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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Oils
Molybdenum
Sodium
Experiments
Hydrocarbons
Cobalt
Nickel
Byproducts
Wood
Vacuum
Oxygen
Catalysts
Acids
Water
Testing
Chemical analysis

Cite this

Elliott, Douglas C. ; Oasmaa, Anja. / Catalytic hydrotreating of black liquor oils. In: Energy & Fuels. 1991 ; Vol. 5, No. 1. pp. 102-109.
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Catalytic hydrotreating of black liquor oils. / Elliott, Douglas C.; Oasmaa, Anja.

In: Energy & Fuels, Vol. 5, No. 1, 1991, p. 102-109.

Research output: Contribution to journalArticleScientificpeer-review

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