Understanding the impact of ionic liquid pretreatment on cellulose and lignin via thermochemical analysis

Fractionation of lignin from eucalyptus bark using amine-sulfonate functionalized ionic liquids

“…The TGA curve of eucalyptus bark showed two main mass losses: the first mass loss in the temperature range of 200-300°C, which is ascribed to the decomposition of hemicellulose present in the biomass and the other at higher temperature (300-400°C) than that of the cellulose. 42 A residual mass of eucalyptus bark at the end of the TGA experiment is between that of the kraft lignin and that of cellulose. This residue may be attributed to the intermediate lignin content of the eucalyptus bark between the pure kraft lignin and pure cellulose.…”

Efficient liquefaction of woody biomass in polyhydric alcohol with acidic ionic liquid as a green catalyst

“…Xie et al reported that wood without any pretreatment was liquefied in allyl alkyl imidazolium ionic liquids at temperatures below 373 K within 40 min [11]. Some kinds of ionic liquids such as 1-Butyl-3-methylimidazole chloride ionic liquid were used to the production of 5-hydroxymethylfurfural from lignocellulose [12e15] and other pretreatment processes [16]. 1-(4-sulfobutyl)-3-methylmidazolium hydrogensulfate ionic liquid was also found to exhibit excellent catalytic activity for woody biomass liquefaction [17,18].…”

The comparison of obtaining fermentable sugars from cellulose by enzymatic hydrolysis and fast pyrolysis

“…In the previous research, two peaks observed for ionic liquid pretreated cellulose was due to the presence of both crystalline and amorphous components in the sample. The first weight loss peak was due to the amorphous component at lower temperature and was followed by weight loss due to the crystalline component, which decomposed at higher temperature (Singh et al, 2013). However, cellulose after ball milling pretreatment showed only a single peak in the DTG curves.…”