TY - JOUR
T1 - Protic ionic liquids as effective agents for pretreatment of cotton stalks at high biomass loading
AU - Semerci, Işık
AU - Güler, Fatma
N1 - Funding Information:
The authors would like to express their sincere gratitude to Prof. Filiz Ozcelik for the use of facilities in the Fermentation Laboratory in the Department of Food Engineering at the Ankara University. This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) via project 116M444 .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - This work demonstrated the performances of different protic ionic liquids (PILs) with respect to their effects on the pretreatment of cotton stalks at a relatively high biomass loading. Among the investigated PILs, 1-butylimidazolium hydrogen sulfate (HBIMHSO4) employed in the presence of 20% (w/w) water at 15% biomass loading and 120 °C for four hours resulted in significant structural changes in the biomass. The lignin content of the cotton stalks was reduced by 35% and the cellulose content increased from 36% to 55% through HBIMHSO4 pretreatment. Enzymatic hydrolysis of the biomass was enhanced almost 5-fold despite an increase in the biomass crystallinity. Morphological changes in the cotton stalks observed through SEM analysis verified the differences in the composition and enzymatic accessibility of the biomass samples subjected to PIL pretreatment. The results successfully revealed the potential of the PIL, HBIMHSO4 for the valorization of cotton stalks, as a significant industrial crop waste, for the first time in the literature.
AB - This work demonstrated the performances of different protic ionic liquids (PILs) with respect to their effects on the pretreatment of cotton stalks at a relatively high biomass loading. Among the investigated PILs, 1-butylimidazolium hydrogen sulfate (HBIMHSO4) employed in the presence of 20% (w/w) water at 15% biomass loading and 120 °C for four hours resulted in significant structural changes in the biomass. The lignin content of the cotton stalks was reduced by 35% and the cellulose content increased from 36% to 55% through HBIMHSO4 pretreatment. Enzymatic hydrolysis of the biomass was enhanced almost 5-fold despite an increase in the biomass crystallinity. Morphological changes in the cotton stalks observed through SEM analysis verified the differences in the composition and enzymatic accessibility of the biomass samples subjected to PIL pretreatment. The results successfully revealed the potential of the PIL, HBIMHSO4 for the valorization of cotton stalks, as a significant industrial crop waste, for the first time in the literature.
KW - 1-Butylimidazolium hydrogen sulfate
KW - Cotton stalks
KW - Enzymatic hydrolysis
KW - Lignocellulosic biomass
KW - Pretreatment
KW - Protic ionic liquid
UR - http://www.scopus.com/inward/record.url?scp=85054318438&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2018.09.046
DO - 10.1016/j.indcrop.2018.09.046
M3 - Article
AN - SCOPUS:85054318438
VL - 125
SP - 588
EP - 595
JO - Industrial Crops and Products
JF - Industrial Crops and Products
SN - 0926-6690
ER -