title: Catalyzed modified clean fractionation of switchgrass.
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%.
authors.affiliation: Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA. iwona.cybulska@sdstate.edu
authors.forename: Iwona
authors.initials: I
authors.lastname: Cybulska
authors.forename: Grzegorz P
authors.initials: GP
authors.lastname: Brudecki
authors.forename: Brett R
authors.initials: BR
authors.lastname: Hankerson
authors.forename: James L
authors.initials: JL
authors.lastname: Julson
authors.forename: Hanwu
authors.initials: H
authors.lastname: Lei
mesh_terms: D056804:Biofuels; D002384:Catalysis; D005591:Chemical Fractionation / Q000379:methods*; D005285:Fermentation; D005947:Glucose / Q000032:analysis; D008031:Lignin / Q000032:analysis; D008897:Panicum / Q000737:chemistry / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D013696:Temperature; D014994:Xylose / Q000032:analysis
chemical_list: D056804:Biofuels; D008031:Lignin; D014994:Xylose; D005947:Glucose