Fig. 6

Alcoholysis of untreated and ball-milled corn stover with different a–c reaction temperatures, d–f catalyst amounts, and g–i substrate loadings. Reaction conditions: a–c 1 g of substrate (5 wt% of solvent amount), 0.2 g of H₂SO₄ (1.0 wt% of solvent amount), 20 g of ethanol; d–f 1 g of substrate (5 wt% of solvent amount), 20 g of ethanol, 170 °C; g–i 0.2 g of H₂SO₄ (1.0 wt% of solvent amount), 20 g of ethanol, 170 °C