High-Solids Process for the Pretreatment of Lignocellulosic Feedstock in Bioethanol Production

    Research output: Contribution to conferencePaper


    This paper describes a high-solids (40-50% solids) pretreatment process that can be used to produce ethanol from lignocellulosic feedstock. A 130-L reactor, designed for processing slurries containing 30-50% solids, was used to demonstrate the process using dilute sulfuric acid. This pilot study showed that the proposed high-solids process is a promising approach to biomass pretreatment for thefollowing reasons: 1) a high degree of xylan hydrolysis with relatively low furfural formation; 2) lower acid consumption on a unit dry weight of biomass; and 3) lower costs due to reductions in heating energy and water usage. The resultant pretreated biomass shows good enzymatic digestibility and fermentability, and it is therefore a suitable substrate in the context of bioethanol production.Furthermore, this process can be easily scaled up because a commercial-scale version of this reactor is used in the cellulose-derivatives industry: this is a vitally important aspect since the scale-up of many bench-scale prototypes is nontrivial.
    Original languageAmerican English
    PagesVol. 2: 1079-1089
    Number of pages11
    StatePublished - 1997
    Event3rd Biomass Conference of the Americas - Montreal, Quebec, Canada
    Duration: 24 Aug 199729 Aug 1997


    Conference3rd Biomass Conference of the Americas
    CityMontreal, Quebec, Canada

    NREL Publication Number

    • NREL/CP-580-23067


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