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. Author manuscript; available in PMC: 2021 Sep 3.
Published in final edited form as: ACS Sustain Chem Eng. 2020 Apr 3;8(16):6551–6563. doi: 10.1021/acssuschemeng.0c01538

Figure 2.

Figure 2.

An exemplary solvent-assisted biomass pretreatment sequence based on the general two-step lignin- and then sugar-removal process described above, followed by an additional bleaching step. Reaction conditions: γ-valerolactone (GVL) solvent with HPLC-grade water as a cosolvent. Sulfuric acid (H2SO4) is used as catalyst. Each step was carried out at 9/1 wt/wt liquids to solids in pressure-sealed glass reactors, with mixing facilitated by a magnetic stir bar agitated at 500 rpm. See ESI for further details.