Fig. 1.

Comparison of acid promoters on fractionation of sugarcane bagasse based on solid residue composition (left y-axis) and biomass digestibility (right y-axis). The reactions contained 10 g sugarcane bagasse in 100 mL of the single-phase solvent mixture containing water/ethanol/ethyl acetate (62.5/25/12.5%v/v) with 0.025 M H₂SO₄ or 20% acetic acid or formic acid with an initial pressure of 20 bar by nitrogen. Reactions were performed at 140–180 °C for 60 min before phase separation