Deep Delignification of Woody Biomass by Repeated Mild Alkaline Treatments with Pressurized O₂.

ABSTRACT: Delignification is essential in effective utilization of carbohydrates of lignocellulosic biomass. Characteristics of the delignification are important for the yield and property of the resulting carbohydrates. Oxidation with O₂ of biomass in alkaline water can potentially produce high-purity cellulose at high yield. The present authors chose a Japanese cedar and investigated its oxidative delignification at 90 °C. The delignification selectivity was determined mainly by the chemical structures of lignin and cellulose. Treatment conditions, except for temperature, hardly changed the relationship between delignification rate and cellulose retention. During the treatment, dissolved lignin underwent chemical condensation in the aqueous phase. This "unfavorable" condensation consume

SUBMITTER: Wang JX 

PROVIDER: S-EPMC7675533 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature