Differences in S/G ratio in natural poplar variants do not predict catalytic depolymerization monomer yields [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 662.8 Other fuels
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: Article No. 2033 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 262816
• Chủ đề: 1. 09 biomass fuels; 2. Biomass pretreatment; 3. Flow-through extraction; 4. Lignin conversion; 5. Sg ratio

Tóm tắt

The ratio of syringyl (S) and guaiacyl (G) units in lignin has been noticed as a major factor in determining the maximum monomer yield from lignin depolymerization. This limit arises from the notion that G units are prone to C-C bond formation during lignin biosynthesis, resulting in less ether linkages that generate monomers. This study uses reductive catalytic fractionation (RCF) in flow-through reactors as an analytical tool to depolymerize lignin in poplar with naturally varying S/G ratios, and directly challenges the common conception that the S/G ratio predicts monomer yields. Rather, this work suggests that the plant controls C-O and C-C bond content by regulating monomer transport during lignin biosynthesis. In general, our results indicate that additional factors beyond the monomeric composition of native lignin are important in developing a fundamental understanding of lignin biosynthesis.