O-211 エタノール中での酸素酸化による木質系バイオマスの脱リグニンと残渣の酵素糖化(セッション5:技術-液体燃料-,口頭発表)

抄録

Selective delignification of pulverized woody biomass was achieved by its autoxidation in ethanol at 130〜160℃. While ethanol alone is readily oxidized with oxygen at these temperatures to give diethyl acetal, ethyl acetate, methane, carbon monoxide, hydrogen, carbon dioxide and so on, the presence of antioxidants such as lignin, lignin model compounds, or lignin containing materials suppresses its oxidation to some extent and the antioxidants themselves are preferably oxidized. The saccharification of the pulp resulting from the delignification of pulverized spruce yielded more than 50 % of monosaccharides based on the dry raw material. The same oxidation of spruce but in water led to its carbonization: dehydration, probably because of the much smaller solubility of oxygen in water than in ethanol or the lack of autoxidation itself.