期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 5, 页码 3913-3919出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.6b03102
关键词
Lignin; Depolymerization; Repolymerization; Methylation; Quinone methide
资金
- U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research [DE-AC02-05CH11231]
Chemoselective blocking of the phenolic hydroxyl (Ar-OH) group by methylation was found to suppress secondary repolymerization and charring during lignin depolymerization. Methylation of Ar-OH prevents formation of reactive quinone methide intermediates, which are partly responsible for undesirable secondary repolymerization reactions. Instead, this structurally modified lignin produces more relatively low molecular weight products from lignin depolymerization compared to unmodified lignin. This result demonstrates that structural modification of lignin is desirable for production of low molecular weight phenolic products. This approach could be directed toward alteration of natural lignification processes to produce biomass that is more amenable to chemical depolymerization.
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