title: High selective delignification using oxidative ionic liquid pretreatment at mild conditions for efficient enzymatic hydrolysis of lignocellulose.
abstract: Herein, the oxidative ionic liquid (IL) pretreatment for overcoming recalcitrance of lignocellulose with selective delignification was investigated, and the subsequent enzymatic hydrolysis was evaluated. IL pretreatment incorporating oxygen delignification could enhance lignin extraction with high selectivity at low carbohydrate loss. The dual-action of oxidative decomposition and dissolution by 1-butyl-3-methlimidazolium chloride (BmimCl) on biomass were synergistically acted, accounting for efficient recalcitrance removal. In addition, the mild oxidative IL treatment only slightly converted crystalline cellulose into amorphous structure, and the extensive extraction of the amorphous lignin and carbohydrate resulted to the expose of cellulose with high susceptibility. Correspondingly, the enzymatic hydrolysis of the pretreated lignocellulose was greatly enhanced. The oxidative IL treatment at mild conditions, collaborating BmimCl treatment with oxygen delignification is a promising and effective system for overcoming the robust structure of lignocellulose.
authors.affiliation: Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China. Electronic address: zhiqiang8505@126.com.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Pang
authors.affiliation: Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
authors.forename: Wenkang
authors.initials: W
authors.lastname: Lyu
authors.affiliation: Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
authors.forename: Cuihua
authors.initials: C
authors.lastname: Dong
authors.affiliation: Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
authors.forename: Hongxing
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
authors.forename: Guihua
authors.initials: G
authors.lastname: Yang
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002241:Carbohydrates / Q000737:chemistry; D044602:Cellulases / Q000737:chemistry / Q000378:metabolism; D002482:Cellulose / Q000737:chemistry; D003460:Crystallization; D006868:Hydrolysis; D052578:Ionic Liquids / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D032107:Populus / Q000737:chemistry; D001617:beta-Glucosidase / Q000737:chemistry / Q000378:metabolism
chemical_list: D002241:Carbohydrates; D052578:Ionic Liquids; C036909:lignocellulose; D002482:Cellulose; D008031:Lignin; D044602:Cellulases; D001617:beta-Glucosidase
keywords: Delignification; Hydrolysis; Ionic liquid; Lignocellulose; Oxidative treatment