With an aromatic structure, lignin has great potential for the production of high value-added chemicals. In this study, Co/m-ATP catalyst was prepared by the co-impregnation method to depolymerize lignin with inexpensive attapulgite as a carrier, 1,4-dioxane as a solvent, and ethanol as an in situ hydrogen source. Meanwhile, formaldehyde stabilization facilitates lignin monomer production during biomass depolymerization. The effects of Co particle loading and reaction conditions (e.g., temperature and reaction time) on lignin conversion and product yield were investigated, resulting in a low char yield (6.6 wt %) and high bio-oil yield (63.1 wt %) when alkali lignin was depolymerized over the Co/m-ATP catalyst (cobalt loading of 15 wt %) at 220 °C for 8 h. Therefore, this catalyst with the advantage of low cost and high catalytic activity would be a potential catalyst during the depolymerization of lignin.

中文翻译：

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钴(II)对酸改性凹凸棒土负载催化剂对碱木质素解聚的影响

木质素具有芳香结构，在生产高附加值化学品方面具有巨大潜力。本研究以廉价的凹凸棒石为载体、1,4-二恶烷为溶剂、乙醇为原位氢源，采用共浸渍法制备了Co/m-ATP催化剂对木质素进行解聚。同时，甲醛稳定化促进了生物质解聚过程中木质素单体的产生。研究了 Co 颗粒负载和反应条件（例如温度和反应时间）对木质素转化率和产物收率的影响，导致碱时炭收率低（6.6 wt %）和生物油收率高（63.1 wt %）木质素在 Co/m-ATP 催化剂（钴负载量为 15 wt%）上在 220 °C 下解聚 8 小时。所以，