Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids.

Title: Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids.
Authors: Gschwend, FJ
Brandt, A
Chambon, CL
Tu, WC
Weigand, L
Hallett, JP
Item Type: Journal Article
Abstract: A number of ionic liquids (ILs) with economically attractive production costs have recently received growing interest as media for the delignification of a variety of lignocellulosic feedstocks. Here we demonstrate the use of these low-cost protic ILs in the deconstruction of lignocellulosic biomass (Ionosolv pretreatment), yielding cellulose and a purified lignin. In the most generic process, the protic ionic liquid is synthesized by accurate combination of aqueous acid and amine base. The water content is adjusted subsequently. For the delignification, the biomass is placed into a vessel with IL solution at elevated temperatures to dissolve the lignin and hemicellulose, leaving a cellulose-rich pulp ready for saccharification (hydrolysis to fermentable sugars). The lignin is later precipitated from the IL by the addition of water and recovered as a solid. The removal of the added water regenerates the ionic liquid, which can be reused multiple times. This protocol is useful to investigate the significant potential of protic ILs for use in commercial biomass pretreatment/lignin fractionation for producing biofuels or renewable chemicals and materials.
Issue Date: 10-Aug-2016
Date of Acceptance: 10-Aug-2016
ISSN: 1940-087X
Publisher: Journal of Visualized Experiments (JoVE)
Journal / Book Title: Jove-Journal of Visualized Experiments
Volume: 114
Issue: 114
Copyright Statement: Copyright © 2016 Journal of Visualized Experiments
Publication Status: Published
Open Access location:
Appears in Collections:Faculty of Engineering
Chemical Engineering
Faculty of Natural Sciences

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