Evaluation of the use of protic ionic liquids on biomass fractionation. (15th October 2017)

• Record Type: Journal Article
• Authors: Rocha, E.G.A.; Pin, T.C.; Rabelo, S.C.; Costa, A.C.
• Is Part Of: Fuel. Volume 206(2017)
• Page Start: 145
• Page End: 154
• Publication Date: 2017-10-15
• Subjects: Sugarcane bagasse -- Protic ionic liquid -- 2-Hydroxy ethylammonium acetate -- Pretreatment -- Enzymatic hydrolysis; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2017.06.014
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: Four PILs were studied for the pretreatment of bagasse. [H3 N(CH2 )2 OH][OAc] showed the best performance, pure or mixed with water. Scale-up showed the variables studied did not affect the enzymatic conversions. [H3 N(CH2 )2 OH][OAc] has potential compared to H2 O2 and hydrothermal pretreatments. Preliminary evaluation of [H3 N(CH2 )2 OH][OAc] recycle indicates need for optimization. Abstract: This work evaluated the use of protic ionic liquids (PILs) in the pretreatment of sugarcane bagasse. Cations and anions with different chain lengths were used to synthesize four PILs, which had their performances evaluated by the solubilization of lignin in the pretreatment step and polysaccharides conversion in the enzymatic hydrolysis. The recovery and recycling of the best performing PIL (2-hydroxy ethylammonium acetate – [H3 N(CH2 )2 OH][OAc]) was evaluated, as well as the addition of water in the PIL and the increase in solids concentration in the pretreatment and hydrolysis steps. Pretreatment of 10% (w/w) unground bagasse with [H3 N(CH2 )2 OH][OAc]: water (5:1 w/w) followed by hydrolysis at 10% (w/v) solids yielded 0.355 g glucose/g raw bagasse and 0.150 g xylose/g raw bagasse.