title: Enhanced saccharification kinetics of sugarcane bagasse pretreated in 1-butyl-3-methylimidazolium chloride at high temperature and without complete dissolution.
abstract: Dissolution of bagasse with 1-butyl-3-methylimidazolium chloride at high temperatures (110-160 °C) is investigated as a pretreatment process for saccharification and fermentation based biofuel production. Material balances are reported and used along with enzymatic saccharification data to identify optimum pretreatment conditions (150 °C for 90 min). At all pretreatment temperatures, dissolved and reprecipitated material is enriched in cellulose, has a low crystallinity and the cellulose component is easily and quantitatively hydrolysed (100%, 3h, 15 FPU). At pretreatment temperatures ≤ 150 °C, the undissolved material has only slightly lower crystallinity than the starting. At pretreatment temperatures ≥ 150 °C, the undissolved material has low crystallinity and when combined with the dissolved material has a saccharification rate and extent similar to completely dissolved material. Complete dissolution is not necessary to maximise saccharification efficiency at temperatures ≥ 150 °C.
authors.affiliation: School of Chemistry, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia. serkaratzos@gmail.com
authors.forename: Karatzos Sergios
authors.initials: KS
authors.lastname: Kimon
authors.forename: Edye
authors.initials: E
authors.lastname: Leslie Alan
authors.forename: Doherty
authors.initials: D
authors.lastname: William Orlando Sinclair
mesh_terms: D056804:Biofuels; D002482:Cellulose / Q000737:chemistry*; D006358:Hot Temperature; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D056804:Biofuels; D007093:Imidazoles; D052578:Ionic Liquids; C036909:lignocellulose; C502841:1-butyl-3-methylimidazolium chloride; D002482:Cellulose; D008031:Lignin; C027433:bagasse