Catalytic hydroprocessing of fast pyrolysis bio-oil from pine sawdust

Douglas C. Elliott (Corresponding Author), Todd R. Hart, Gary G. Neuenschwander, Leslie J. Rotness, Mariefel V. Olarte, Alan H. Zacher, Yrjö Solantausta

    Research output: Contribution to journalArticleScientificpeer-review

    199 Citations (Scopus)


    Catalytic hydroprocessing has been applied to the fast pyrolysis liquid product (bio-oil) from softwood biomass in a bench-scale continuous-flow fixed-bed reactor system. The intent of the research was to develop process technology to convert the bio-oil into a petroleum refinery feedstock to supplement fossil energy resources and to displace imported feedstock. This paper is focused on the process experimentation and product analysis. A range of operating parameters, including temperature from 170 or 250 to 400 °C in the two-stage reactor and flow rate of 0.19 liquid hourly space velocity, was tested with bio-oil derived from pine wood. Times on stream of up to 90 h were evaluated, and losses of catalyst activity were assessed. Product yields of 0.35–0.45 g of oil product/g of dry bio-oil feed with hydrogen consumptions from 342 to 669 L/L of bio-oil feed were measured. Analyses determined that product oils with densities of 0.82–0.92 g/mL had oxygen contents of 0.2–2.7 wt % and total acid number (TAN) of <0.01–2.7 mg of KOH/g. In summation, the paper provides an initial understanding of the efficacy of hydroprocessing as applied to the Finnish pine bio-oil.
    Original languageEnglish
    Pages (from-to)3891-3896
    JournalEnergy & Fuels
    Issue number6
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed


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