doi:10.16597/j.cnki.issn.1002 - 154x.2025.04.003
氧化镁负载的氮掺杂竹炭及其催化松香酯化性能研究
左志瑞 尤 洁 吴瑞锋 卢贝丽* 吕建华
（福建农林大学 材料工程学院，福州 350000）
摘 要 作者以氯化镁和尿素为前驱体，通过竹炭浸渍与高温燃烧制备氧化镁（MgO）负载的氮掺杂竹炭催化剂（MgNC），并利用 XRD、BET 和 XPS 对共晶体结构特征、孔结构及表面化学状态进行表征。结果表明，该方法可成功负载 MgO，负载后竹炭的比表面积高达 1 325.72 m²·g⁻¹，表明 MgO 在竹炭上分散良好，未堵塞孔隙。以松香与甘油的酯化反应为模型反应，考察催化剂和酯化条件对松香转化率的影响。当 MgNC 用量为 0.3 g，松香与甘油质量比为 4.7：1（松香 15 g），270 ℃下反应 4 h，松香转化率可达 95.3%，高催化活性主要归因于 MgO 在竹炭上的分散负载和较高的比表面积，有利于活性位点的充分利用。此外，循环实验证明 MgNC 具有良好的可重复利用性。
关键词 氧化镁 竹炭 前浸渍 氮掺杂 松香酯化
Magnesium Oxide Loaded Nitrogen-doped Bamboo Char and Its Catalytic Performance for Rosin Esterification
ZUO Zhirui YOU Jie WU Ruifeng LU Beili* LV Jianhua
(College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350000, China)
Abstract In this study, a magnesium oxide (MgO)-loaded nitrogen-doped bamboo char catalyst (MgNC) was prepared using magnesium chloride and urea as precursors through bamboo char impregnation and high-temperature carbonization. The crystalline structure, pore characteristics, and surface chemical states of the catalyst were characterized by XRD, BET, and XPS analysis. The results confirmed the successful loading of MgO, with the specific surface area of bamboo char remaining at 1 325.72 m²·g⁻¹, indicating good dispersion of MgO without significant pore blockage. The esterification of rosin with glycerol was used as a model reaction to evaluate the effects of the catalyst and reaction conditions on rosin conversion. A rosin conversion of 95.3% was achieved when the reaction was conducted at 270 ℃ for 4 h using 0.3 g of MgNC as the catalyst and a rosin-to-glycerol mass ratio of 4.7：1 (15 g of rosin). The high catalytic activity was attributed to the uniform dispersion of MgO and the high surface area, which facilitated the efficient utilization of active sites. Furthermore, recycling experiments demonstrated that MgNC exhibited good reusability.
Keywords magnesium oxide bamboo char pre-impregnation nitrogen doping rosin esterification