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Mild, Electroreductive Lignin Cleavage: Optimizing the Depolymerization of Authentic Lignins
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DOI：10.1021/acssuschemeng.2c00820.png)
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Among candidate strategies to depolymerize lignin, electroreduction has promise as a mild, environmentally friendly, low-cost method to cleave lignin's most common linkage, the beta-O-4 bond. Much of the prior work on lignin electrolysis has focused on anodic (oxidative) approaches, while most available electroreduction studies have studied lignin model compounds rather than authentic lignin. Here, after optimizing with a model system, we investigated the room-temperature electroreductive cleavage of four common lignin samples from different pretreatment approaches, including Kraft, Soda, GVL, and Cu-AHP lignin. This mild electrolysis process resulted in the solubilization of 45% of the GVL lignin and 60% of the Cu-AHP lignin, affording approximately 17.6 and 19.4 wt % of monomeric materials, respectively. The present work is an encouraging first step toward an electroreductive strategy for lignin depolymerization and upgrading.
Keyword:
electroreduction
lignin depolymerization
copper-catalyzed alkaline hydrogen peroxide (Cu-AHP) process
gamma-valerolactone (GVL) pretreatment
biomass upgrading
期刊
IF:
7.3
论文数:
1.7W
被引数:
10.7W
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引用论文
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