title: Pre-treatment of lignocellulosic biomass using ionic liquids: wheat straw fractionation.
abstract: This work is devoted to study pre-treatment methodologies of wheat straw with 1-ethyl-3-methylimidazolium acetate ([emim][CH3COO]) and subsequent fractionation to cellulose, hemicellulose and lignin. The method developed and described here allows the separation into high purity carbohydrate and lignin fractions and permits an efficient IL recovery. A versatility of the established method was confirmed by the IL reuse. The fractionation of completely dissolved biomass led to cellulose-rich and hemicellulose-rich fractions. A high purity lignin was also achieved. To verify the potential further applicability of the obtained carbohydrate-rich fractions, and to evaluate the pre-treatment efficiency, the cellulose fraction resulting from the treatment with [emim][CH3COO] was subjected to enzymatic hydrolysis. Results showed a very high digestibility of the cellulose samples and confirmed a high glucose yield for the optimized pre-treatment methodology.
authors.affiliation: Laboratório Nacional de Energia e Geologia, Unidade de Bioenergia, 1649-038 Lisboa, Portugal.
authors.forename: André M
authors.initials: AM
authors.lastname: da Costa Lopes
authors.forename: Karen G
authors.initials: KG
authors.lastname: João
authors.forename: Djonatam F
authors.initials: DF
authors.lastname: Rubik
authors.forename: Ewa
authors.initials: E
authors.lastname: Bogel-Łukasik
authors.forename: Luís C
authors.initials: LC
authors.lastname: Duarte
authors.forename: Jürgen
authors.initials: J
authors.lastname: Andreaus
authors.forename: Rafał
authors.initials: R
authors.lastname: Bogel-Łukasik
mesh_terms: D018533:Biomass; D007477:Ions; D008031:Lignin / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*
chemical_list: D007477:Ions; C036909:lignocellulose; D008031:Lignin
keywords: Cellulose; Fractionation; Hemicellulose; Ionic liquid; Lignin; Lignocellulose; Pre-treatment