In this work, lignin depolymerization was examined over CoMo sulfide catalysts supported on different carriers in supercritical ethanol system. The temperature, time, MoS₂ and carrier effects on the lignin depolymerization were investigated. 95.76% liquefaction yield with negligible char was achieved over Co–Mo–S/ZrO₂ at 340 °C for 150 min. The liquid product was mainly composed of C₄–C₈ alcohols, C₄–C₁₀ esters and C₇–C₁₀ aromatic compounds. The synergistic effect of active sites and acid-base sites on support played an important role in lignin depolymerization. Furthermore, the Co–Mo–S/ZrO₂ catalyst is reusable with 8% loss in liquefaction yield after 5 cyclic runs. We believe that acid/base carriers or additives that can promote the medium to generate abundant free radicals or ions to replace external hydrogen pressure are one of the prospects for the design of depolymerization lignin catalysts.

在这项工作中，在超临界乙醇系统中，在负载在不同载体上的 CoMo 硫化物催化剂上检查了木质素解聚。研究了温度、时间、MoS ₂和载体对木质素解聚的影响。在 Co-Mo-S/ZrO _{2 上}在 340 °C 下 150 分钟实现了 95.76% 的液化产率和可忽略不计的焦炭。液体产品主要由C ₄ -C ₈醇、C ₄ -C ₁₀酯和C ₇ -C ₁₀芳族化合物组成。活性位点和酸碱位点对载体的协同作用在木质素解聚过程中发挥了重要作用。此外，Co-Mo-S/ZrO ₂催化剂可重复使用，5 次循环运行后液化产率损失 8%。我们认为，能够促进介质产生大量自由基或离子以替代外部氢压的酸/碱载体或添加剂是解聚木质素催化剂设计的前景之一。