title: Comparison of different ionic liquids pretreatment for corn stover enzymatic saccharification.
abstract: Recently, application of ionic liquids (ILs) has received much attention due to their special solvency properties as a promising method of pretreatment for lignocellulosic biomass. Easy recovery of ionic liquids, chemical stability, temperature stability, nonflammability, low vapor pressure, and wide liquidus range are among those unique properties. These solvents are also known as green solvents due to their low vapor pressure. The present study was set to compare the effect of five different ILs, namely, 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]), 1-butyl-3-methylimidazolium chloride ([BMIM][Cl]), 1-ethyl-3-methyl imidazolium diethyl phosphate ([EMIM][DEP]), 1-allyl-3-methylimidazolium chloride ([AMIM][Cl]), and 1-ethyl-3-methylimidazolium-hydrogen sulfate ([EMIM][HSO₄]), on corn stover in a bioethanol production process. The performance of ILs was evaluated based on the change observed in chemical structure, crystallinity index, cellulose digestibility, and glucose release. Overall, [EMIM][Ac]-pretreated corn stover led to significantly higher saccharification, with cellulose digestibility reaching 69% after 72 hr, whereas digestibility of untreated barley straw was measured at only 21%.
authors.affiliation: a Department of Chemical Engineering, South Tehran Branch , Islamic Azad University , Tehran , Iran.
authors.forename: Sohrab Haghighi
authors.initials: SH
authors.lastname: Mood
authors.forename: Amir Hossein
authors.initials: AH
authors.lastname: Golfeshan
authors.forename: Meisam
authors.initials: M
authors.lastname: Tabatabaei
authors.forename: Saeed
authors.initials: S
authors.lastname: Abbasalizadeh
authors.forename: Mehdi
authors.initials: M
authors.lastname: Ardjmand
authors.forename: Gholamreza Salehi
authors.initials: GS
authors.lastname: Jouzani
mesh_terms: D000498:Allyl Compounds / Q000378:metabolism; D001234:Aspergillus niger / Q000201:enzymology; D001709:Biotechnology / Q000379:methods; D002480:Cellulase / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism*; D007093:Imidazoles / Q000378:metabolism; D052578:Ionic Liquids / Q000378:metabolism*; D010755:Organophosphates / Q000378:metabolism; D014242:Trichoderma / Q000201:enzymology; D003313:Zea mays / Q000378:metabolism*; D001617:beta-Glucosidase / Q000378:metabolism
chemical_list: C544334:1-allyl-3-methylimidazolium; C543070:1-ethyl-3-methyl imidazolium diethyl phosphate; D000498:Allyl Compounds; D007093:Imidazoles; D052578:Ionic Liquids; D010755:Organophosphates; C502841:1-butyl-3-methylimidazolium chloride; D002482:Cellulose; D001617:beta-Glucosidase; D002480:Cellulase; D005947:Glucose; C518739:1-ethyl-3-methylimidazolium