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Cholinium carboxylate ionic liquids for pretreatment of lignocellulosic materials to enhance subsequent enzymatic saccharification

Paper ID Volume ID Publish Year Pages File Format Full-Text
3432 170 2013 5 PDF Available
Title
Cholinium carboxylate ionic liquids for pretreatment of lignocellulosic materials to enhance subsequent enzymatic saccharification
Abstract

The present study is the first report demonstrating that ionic liquids consisting of cholinium cations and linear carboxylate anions ([Ch][CA] ILs) can be used for pretreatment of lignocellulosic materials to enhance subsequent enzymatic saccharification. Six variants of [Ch][CA] ILs were systematically prepared by combining cholinium cations with linear monocarboxylate anions ([CnH2n+1–COO]−, n = 0–2) or dicarboxylate anions ([HOOC–CnH2n+1–COO]−, n = 0–2). These [Ch][CA] ILs were analyzed for their toxicity to yeast cell growth and their ability to pretreat kenaf powder for subsequent enzymatic saccharification. When assayed against yeast growth, the EC50 for choline acetate ([Ch][OAc]) was 510 mM, almost one order of magnitude higher than that for 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]). The cellulose saccharification ratio after pretreatment at 110 °C for 16 h with [Ch][OAc] (100.6%) was almost comparable with that after pretreatment with [Emim][OAc]. Therefore, [Ch][OAc] is a biocompatible alternative to [Emim][OAc] for lignocellulosic material pretreatment.

► Cholinium carboxylate ionic liquids (ILs) were used to pretreat lignocellulose. ► Especially, choline acetate ([Ch][OAc]) was found to be promising cholinium IL. ► [Ch][OAc] was compared with 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]). ► [Ch][OAc] was more biocompatible than [Emim][OAc]. ► [Ch][OAc] could pretreat lignocellulosic biomass as [Emim][OAc] did.

Keywords
Ionic liquid; Pretreatment; Lignin; Cellulose; Cellulase; Yeast
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Cholinium carboxylate ionic liquids for pretreatment of lignocellulosic materials to enhance subsequent enzymatic saccharification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 71, 15 February 2013, Pages 25–29
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us