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Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures

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Title: Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures
Authors: Gschwend, FJV
Brandt-Talbot, A
Malaret, FJ
Shinde, S
Hallett, JP
Item Type: Journal Article
Abstract: Deconstruction with low-cost ionic liquids (ionoSolv) is a promising method to pre-condition lignocellulosic biomass for the production of renewable fuels, materials and chemicals. This study investigated process intensification strategies for the ionoSolv pretreatment of Miscanthus X giganteus using the low-cost ionic liquid triethylammonium hydrogen sulfate ([TEA][HSO4]) in the presence of 20 wt% water, using high temperatures and a high solid to solvent loading of 1:5 g/g. The temperatures investigated were 150, 160, 170 and 180°C. We discuss the effect of pretreatment temperature on lignin and hemicellulose removal, cellulose degradation and enzymatic saccharification yields. We report that very good fractionation can be achieved across all investigated temperatures, including an enzymatic saccharification yield exceeding 75% of the theoretical maximum after only 15 min of treatment at 180°C. We further characterised the recovered lignins which established some tunability of the hydroxyl group content, subunit composition, connectivity and molecular weight distribution in the isolated lignin while maintaining maximum saccharification yield. This drastic reduction of pretreatment time at increased biomass loading without a yield penalty is promising for the development of a commercial ionoSolv pretreatment process.
Issue Date: 7-Aug-2018
Date of Acceptance: 7-May-2018
URI: http://hdl.handle.net/10044/1/59917
DOI: https://dx.doi.org/10.1039/c8gc00837j
ISSN: 1463-9262
Publisher: Royal Society of Chemistry
Start Page: 3486
End Page: 3498
Journal / Book Title: Green Chemistry
Volume: 20
Issue: 15
Copyright Statement: © The Royal Society of Chemistry 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/)
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/K038648/1
EP/K014676/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Green & Sustainable Science & Technology
Chemistry
Science & Technology - Other Topics
LIGNOCELLULOSIC ETHANOL-PRODUCTION
GENERALIZED SEVERITY PARAMETER
DILUTE-ACID HYDROLYSIS
PHENOMENOLOGICAL KINETICS
TECHNOECONOMIC ANALYSIS
LAND-USE
LIGNIN
BIOMASS
CELLULOSE
SWITCHGRASS
03 Chemical Sciences
Organic Chemistry
Publication Status: Published
Online Publication Date: 2018-06-29
Appears in Collections:Faculty of Engineering
Chemistry
Chemical Engineering
Faculty of Natural Sciences



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