Effect of pretreatment severity on the cellulose and lignin isolated from Salix using ionoSolv pretreatment
File(s)
Submitted version
Author(s)
Weigand, Lisa
Mostame, Shahrokh
Brandt-Talbot, Agnieszka
Welton, Tom
Hallett, Jason P
Type
Journal Article
Abstract
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.
Date Issued
2017-09-01
Date Acceptance
2017-03-10
Citation
Faraday Discussions, 2017, 202, pp.331-349
ISSN
1359-6640
Publisher
Royal Society of Chemistry
Start Page
331
End Page
349
Journal / Book Title
Faraday Discussions
Volume
202
Copyright Statement
This journal is © The Royal Society of Chemistry 2017
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411412300020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/K014676/1
Subjects
ACID
BIOSYNTHESIS
Chemistry
Chemistry, Physical
DELIGNIFICATION
ENZYMATIC-HYDROLYSIS
IONIC LIQUIDS
LIGNOCELLULOSIC BIOMASS
MIXTURES
NMR
Physical Sciences
Science & Technology
WATER
Publication Status
Published
Date Publish Online
2017-03-10