title: Kinetics of SO2-ethanol-water (AVAP®) fractionation of sugarcane straw.
abstract: Kinetics of SO2-ethanol-water (AVAP®) fractionation was determined for sugarcane (SC) straw in terms of pulp composition (non-carbohydrate components, cellulose, hemicelluloses) and properties (kappa number, pulp intrinsic viscosity in CED and cellulose degree of polymerization). Effect of temperature (135-165°C) and time (18-118min) was studied at fixed liquor composition (SO2/ethanol/water=12:22.5:65.5, w/w) and a liquor-to-solid ratio (4Lkg(-1)). Interpretation is given in terms of major fractionation reactions, removal of non-carbohydrate components and xylan, as well as acid hydrolysis of cellulose, and is compared to other lignocellulosic substrates (beech, spruce and wheat straw). Overall, SO2-ethanol-water process efficiently fractionates SC straw by separating cellulose from both non-carbohydrate components and xylan while reducing cellulose DP.
authors.affiliation: Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland.
authors.forename: Xiang
authors.initials: X
authors.lastname: You
authors.affiliation: Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland; Department of Chemical and Biological Engineering, University of Maine, 5737 Jenness Hall, Orono, ME 04469-5737, USA.
authors.forename: Adriaan
authors.initials: A
authors.lastname: van Heiningen
authors.affiliation: Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland.
authors.forename: Herbert
authors.initials: H
authors.lastname: Sixta
authors.affiliation: Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland; American Process Inc., 750 Piedmont Av., Atlanta, GA 30308, USA. Electronic address: Mikhail@americanprocess.com.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Iakovlev
mesh_terms: D002482:Cellulose / Q000378:metabolism; D005591:Chemical Fractionation / Q000379:methods*; D000431:Ethanol / Q000737:chemistry*; D006868:Hydrolysis; D007700:Kinetics; D008031:Lignin / Q000302:isolation & purification; D058105:Polymerization; D031786:Saccharum / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry*; D014908:Triticum; D014866:Waste Products; D014867:Water / Q000737:chemistry*; D014990:Xylans / Q000302:isolation & purification
chemical_list: D014866:Waste Products; D014990:Xylans; D014867:Water; D013458:Sulfur Dioxide; D000431:Ethanol; D002482:Cellulose; D008031:Lignin
keywords: AVAP® process; Biofuels; Biorefinery; SO(2)–ethanol–water fractionation; Sugarcane straw