title: Recovery of ionic liquid and sugars from hydrolyzed biomass using ion exclusion simulated moving bed chromatography.
abstract: Efficient recovery of ionic liquid (IL) from aqueous mixture of ILs and sugars (which derived from enzymatic or chemical catalyzed hydrolysis of ILs-pretreated biomass) is a major drawback for commercialization of biofuel and platform chemicals production from biomass utilized ILs as pretreatment solvent. In this study, simulated moving bed (SMB) chromatography equipped with ion exclusion column (containing [Emim]+ cation) was investigated to separate sugars (glucose and xylose) which are the main products from biomass hydrolysate and 1-ethyl-3-methylimidazolium acetate (EmimAc) which is the ILs used for biomass pretreatment. A four-zone SMB system with a configuration of 2-2-2-2 (2 ion exclusion columns in each zone) was used to recover glucose, xylose and EmimAc from their aqueous mixture with yield of 71.38, 99.37 and 98.92%, respectively. Moreover, the optimization of SMB zone configuration by simulation results in a complete recovery of ILs. This result indicates that for the first time, ion exclusion SMB chromatography could be used for complete recovery of ILs from aqueous sugar mixture.
authors.affiliation: Department of Biological Engineering, Inha University, Incheon, South Korea.
authors.forename: Ngoc Lan
authors.initials: NL
authors.lastname: Mai
authors.forename: Nam Trung
authors.initials: NT
authors.lastname: Nguyen
authors.forename: Jin-Il
authors.initials: JI
authors.lastname: Kim
authors.forename: Hyuk-Min
authors.initials: HM
authors.lastname: Park
authors.forename: Sung-Kyun
authors.initials: SK
authors.lastname: Lee
authors.forename: Yoon-Mo
authors.initials: YM
authors.lastname: Koo
mesh_terms: D000327:Adsorption; D056804:Biofuels; D018533:Biomass; D002845:Chromatography / Q000379:methods*; D005947:Glucose / Q000737:chemistry / Q000302:isolation & purification*; D007093:Imidazoles / Q000737:chemistry / Q000302:isolation & purification; D052578:Ionic Liquids / Q000737:chemistry / Q000302:isolation & purification*; D016014:Linear Models; D014994:Xylose / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D056804:Biofuels; D007093:Imidazoles; D052578:Ionic Liquids; D014994:Xylose; D005947:Glucose; C518739:1-ethyl-3-methylimidazolium