催化作用
化学
分馏
木质纤维素生物量
氧化磷酸化
生物量(生态学)
单体
有机化学
色谱法
木质素
生物化学
生物
农学
聚合物
作者
Yanbin Cui,Eric P. Weeda,Surajudeen Omolabake,Steven D. Karlen,Christopher M. Holland,Shannon S. Stahl
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2024-06-19
卷期号:12 (26): 9795-9804
标识
DOI:10.1021/acssuschemeng.4c02120
摘要
Methods for catalytic fractionation of biomass provide a means to convert lignin directly into monomers while generating a high-quality cellulosic stream, contrasting conventional biomass pretreatment strategies that prioritize the cellulosic fraction. Here, a nonprecious-metal Co-N-P-C catalyst is identified for aerobic oxidative catalytic fractionation (OCF) of poplar feedstock in dimethyl carbonate that achieves significantly higher yields of aromatic monomers (24 wt %) relative to those obtained with a recently reported Co-N-C catalyst in acetone solvent (15 wt %). Mechanistic studies indicate that the acidic properties of the catalyst contribute to its improved performance by promoting extraction of lignin from insoluble polysaccharides. This OCF process is complemented by the development of a new centrifugal partition chromatography (CPC) method that supports isolation of all five major aromatic monomers (syringic acid, syringaldehyde, vanillic acid, vanillin, and para-hydroxybenzoic acid) in a single liquid–liquid extraction purification step. This OCF/CPC sequence has important implications for future lignin valorization efforts.
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