Catalyzed modified clean fractionation of switchgrass

Cybulska, Iwona;Brudecki, Grzegorz P.;Hankerson, Brett R.;Julson, James L.;Lei, Hanwu
(2013) Bioresource Technology — Vol. 127, p. 92-99 (2013)

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  • Cybulska, IwonaDepartment of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA
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  • Brudecki, Grzegorz P.Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA
    Author
  • Hankerson, Brett R.Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA
    Author
  • Julson, James L.Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA
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  • Lei, HanwuCollege of Engineering and Architecture, Washington State University, Richland, WA 99352, USA
    Author
Abstract
Switchgrass was used as a lignocellulosic feedstock for second generation ethanol production, after pretreatment using sulfuric acid-catalyzed modified clean fractionation based on NREL’s (National Renewable Energy Laboratory) original procedure. Optimization of temperature, catalyst concentration and solvent composition was performed using Response Surface Methodology, and 59.03 ± 7.01% lignin recovery, 84.85 ± 1.34% glucose, and 44.11 ± 3.44% aqueous fraction xylose yields were obtained at 140.00 °C, 0.46% w/w catalyst concentration, 36.71% w/w ethyl acetate concentration, and 25.00% w/w ethanol concentration. The cellulose fraction did not inhibit the fermentation performance of Saccharomyces cerevisiae and resulted in an ethanol yield of 89.60 ± 2.1%.
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Cybulska, I., Brudecki, G. P., Hankerson, B. R., Julson, J. L., & Lei, H. (2013). Catalyzed modified clean fractionation of switchgrass. Bioresource Technology, 127, 92-99. https://doi.org/10.1016/j.biortech.2012.09.131 (Original work published 2013)