Imperial College London

Dr Florence Gschwend

Faculty of EngineeringDepartment of Chemical Engineering

Honorary Research Fellow



f.gschwend12 Website




329Bone BuildingSouth Kensington Campus






BibTex format

author = {Gschwend, FJ and Brandt, A and Chambon, CL and Tu, WC and Weigand, L and Hallett, JP},
doi = {10.3791/54246},
journal = {Jove-Journal of Visualized Experiments},
title = {Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids.},
url = {},
volume = {114},
year = {2016}

RIS format (EndNote, RefMan)

AB - 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.
AU - Gschwend,FJ
AU - Brandt,A
AU - Chambon,CL
AU - Tu,WC
AU - Weigand,L
AU - Hallett,JP
DO - 10.3791/54246
PY - 2016///
SN - 1940-087X
TI - Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids.
T2 - Jove-Journal of Visualized Experiments
UR -
UR -
UR -
VL - 114
ER -