| abstract |
Disclosed herein is a method for producing a partially hydrolysed lignocellulosic material, comprising: pretreating a lignocellulosic material with a pretreatment solution comprising 40% to 99% by weight glycerol, 0.1 % to 5% by weight an acid catalyst selected from the group consisting of sulphuric acid, phosphoric acid, hydrochloric acid, hydrofluoric acid, hydrobromic acid, hydroiodic acid, nitric acid, and acidic metal salts, and 1 % to 60% by weight water; and heating the lignocellulosic material and the pretreatment solution from 80 °C to 100 °C for up to 120 minutes. Also disclosed is a subsequent enzymatic hydrolysing step for producing a fermentable sugar comprising treating the partially hydrolysed lignocellulosic material with an enzyme selected from the group consisting of cellulases, ligninases, hemicellulases, xylanases, lipases, pectinases, amylases, and proteinases, wherein the resulting fermentable sugar is a glucose, xylose, arabinose, galactose, mannose, rhamnose, sucrose, fructose, or any combination thereof. |