Fig. 3From: Delignification of softwood by glycerol from biodiesel by-product I: model reaction using glycerol and fatty acid sodium soap mixture for pretreatment on bioethanol productionTemperature dependence of delignification for different biomasses with 20% sodium oleate in glycerol. Symbols: filled circle, Japanese cedar; open circle, spruce; filled triangle, oak; open triangle, beech; closed square, rice straw; open square, bamboo. Data at 0 °C show lignin content of raw biomassBack to article page