Scale-up of biomass conversion using 1-ethyl-3-methylimidazolium acetate as the solvent

Wheat Bran Pretreatment by Room Temperature Ionic Liquid-Water Mixture: Optimization of Process Conditions by PLS-Surface Response Design

“…Indeed, we have shown, in previous work, a significant effect on improving enzymatic saccharification after IL pretreatment on cellulose or woody residues from 25°C for 20 min or 45°C for 40 min, respectively (Auxenfans et al, 2012, 2014a). However, an increase in the temperature or duration of IL-pretreatment allow to achieve higher sugar yields usually implemented at temperature between 80°C and 160°C from hours to overnight regardless of biomass (Olivier-Bourbigou et al, 2010; Brandt et al, 2013; Badgujar and Bhanage, 2015; Liang et al, in press). Another point that can be connected is the biomass loading, especially with pretreatment with pure IL due to high viscosity (Alayoubi et al, 2019).…”

“…This step was repeated 6 times until amber-colored suspension became clear with conductivity lower than 200 μS/cm. This extensive washing step ensured minimization of residual IL to prevent interference with the enzymatic hydrolysis (Liang et al, in press). The resulting insoluble substrate was then freeze-dried at room temperature for 24 h and collected for subsequent enzymatic hydrolysis.…”

“…Moreover, imidazolium-based RTILs can be reused without loss of pretreatment efficiency (Shill et al, 2011; Auxenfans et al, 2012, 2014a,b) present biocompatibility with cellulolytic enzymes (Engel et al, 2012; Auxenfans et al, 2017b) and fermentative microorganisms (Mehmood et al, 2015; Ryu et al, 2015). Moreover, the feasibility of scale-up with this ionic liquid (IL) was demonstrated on switchgrass pointing out as well challenges still existing prior to pilot scale demonstration such as IL recycling and reuse, development of IL-tolerant enzyme cocktails or one-pot process for an economically viable process (Liang et al, in press).…”

New biobased-zwitterionic ionic liquids: efficiency and biocompatibility for the development of sustainable biorefinery processes

“…These maximal performances obtained with ZIL2 were then compared with those obtained after C 2 mimOAc pretreatment, the reference ionic liquid for biomass pretreatment reported in the literature. 49,50 In our experimental conditions, C 2 mimOAc was shown more suitable than ZIL2 to efficiently The structural changes induced by ZIL pretreatments were thoroughly studied in order to explain the improvement of saccharification after ZIL-pretreatment. The morphological properties of oak sawdust before and after ZIL-pretreatment were thus investigated by scanning electron microscopy (SEM) and compared to those induced by C 2 mimOAc pretreatment.…”

Stimuli‐Responsive Ionic Liquids and the Regulation of Aggregation Structure and Phase Behavior†

“…Since the 21 st century, a large number of novel ILs with cations such as quaternary ammonium, quaternary phosphonium, pyrrole, diimidazole, pyridine, naphthenate, and sulfur salts have been reported. [ 3‐5 ] Due to the designability of ILs, the third‐generation ILs, namely functionalized ILs, are prepared carefully by combining different cations and anions of functional groups based on specific applications, such as gas absorption, [ 6‐11 ] extraction and separation, [ 12‐17 ] catalytic reaction, [ 18‐24 ] organic synthesis, [ 25‐27 ] biomass utilization, [ 28‐36 ] and electrochemistry. [ 36‐39 ] These third‐generation ILs have attracted increasing attention from academia to industrial communities with the rise of green chemistry.…”