Fig. 2From: Delignification of softwood by glycerol from biodiesel by-product I: model reaction using glycerol and fatty acid sodium soap mixture for pretreatment on bioethanol productionLignin content of Japanese cedar and oak after treatment with 20% sodium soaps dissolved in glycerol at 250 °C for 1 h. Dashed lines show lignin content of untreated samplesBack to article page