Imperial College London

Professor Tom Welton

Faculty of Natural SciencesDepartment of Chemistry

Professor of Sustainable Chemistry



+44 (0)20 7594 5763t.welton Website




601AMolecular Sciences Research HubWhite City Campus






BibTex format

author = {Weigand, L and Mostame, S and Brandt-Talbot, A and Welton, T and Hallett, JP},
doi = {10.1039/c7fd00059f},
journal = {Faraday Discussions},
pages = {331--349},
title = {Effect of pretreatment severity on the cellulose and lignin isolated from Salix using ionoSolv pretreatment},
url = {},
volume = {202},
year = {2017}

RIS format (EndNote, RefMan)

AB - The ionoSolv pretreatment is a new technique employing protic low-cost ionic liquids and has previously been applied to successfully fractionate switchgrass and the grass Miscanthus giganteus. This study investigates the effect of using the protic ionic liquid solution [N2220][HSO4]80% with two different acid/base ratios (1.02 and 0.98) at 120, 150 and 170 °C on the pretreatment outcome of the hardwood willow. The ionic liquid solution was able to fractionate willow, and a pulp and lignin fraction were recovered after treatment. The pretreatment success was determined via enzymatic hydrolysis of the pulp, which showed that the ionoSolv pretreatment was able to increase enzymatic glucose yields compared to untreated willow biomass. The pretreatment produced a cellulose-rich pulp with high hemicellulose and lignin removal. The pulp composition and glucose yield after saccharification were greatly influenced by the acidity of the ionic liquid solution, temperature and pretreatment time. The extracted lignin was analysed via 2-D HSQC NMR spectroscopy and GPC to investigate the changes in the lignin structure induced by the pretreatment severity. The lignin structure (in terms of inter-unit linkages and S/G ratio) and molecular weight varied significantly depending on the pretreatment conditions used.
AU - Weigand,L
AU - Mostame,S
AU - Brandt-Talbot,A
AU - Welton,T
AU - Hallett,JP
DO - 10.1039/c7fd00059f
EP - 349
PY - 2017///
SN - 1359-6640
SP - 331
TI - Effect of pretreatment severity on the cellulose and lignin isolated from Salix using ionoSolv pretreatment
T2 - Faraday Discussions
UR -
VL - 202
ER -