Valorization of Miscanthus × giganteus by γ-Valerolactone/H2O/FeCl3 system toward efficient conversion of cellulose and hemicelluloses. (15th October 2021)

• Record Type: Journal Article
• Authors: Ding, Dayong; Hu, Jianquan; Hui, Lanfeng; Liu, Zhong; Shao, Lupeng
• Is Part Of: Carbohydrate polymers. Volume 270(2021)
• Publication Date: 2021-10-15
• Subjects: γ-Valerolactone -- FeCl3 catalysis -- Enzymatic hydrolysis -- Furfural -- Lignin; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2021.118388
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: γ-Valerolactone (GVL), a biomass-derived green chemical, offers an environmentally responsible solvent for conversion of lignocellulose to high value-added chemicals. Herein, we report a two-step process for directly producing cellulosic residual, furfural and lignin from Miscanthus × giganteus ( M. × giganteus ) bypassing the isolation of xylose, which exhibits promising advantage in energy reduction. The optimized pretreatment (100 mM FeCl3 at 160 °C for 60 min) induced significant xylan removal (98.4%), resulting in rugged fibre surface, thus leading to the peak cellulose conversion of 99.3%. Furfural yield in the second step reached to 76.6% after 100 mM FeCl3 catalyzed GVL/H2 O treatment at 180 °C for 10 min without addition of any chemical. The extracted lignin showed representative structure (such as β-O-4′, β-β′ linkages) and medium molecular weight (4275.5 g/mol). 79.6% of furfural can be recovered by distillation. This study proposes a systematic and energy efficient approach for maximizing biomass utilization. Highlights: Miscanthus × giganteus was fractionated in FeCl3 catalyzed GVL/H2 O system. Cellulose conversion was enhanced by 10-fold after pretreatment. Furfural yield reached to 76.6% bypassing the process of xylose isolation. 79.6% of furfural can be recovered by distillation.