摘要
作者以氯化镁和尿素为前驱体,通过竹炭浸渍与高温煅烧制备氧化镁(MgO)负载的氮掺杂竹炭催化剂(MgNC),并利用XRD、BET和XPS对其晶体结构特征、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1325.72 m^(2)·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。
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 hightemperature 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 1325.72 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.
作者
左志瑞
尤洁
吴瑞锋
卢贝丽
吕建华
ZUO Zhirui;YOU Jie;WU Ruifeng;LU Beili;LV Jianhua(College of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou 350000,China)
出处
《化工时刊》
2025年第4期11-16,共6页
Chemical Industry Times
基金
福建省高校产学合作项目(2023H6009)。
关键词
氧化镁
竹炭
前浸渍
氮掺杂
松香酯化
magnesium oxide
bamboo char
pre-impregnation
nitrogen doping
rosin esterification
作者简介
左志瑞(2000-),男,在读硕士生,主要从事生物质碳基催化材料的性能研究,E-mail:15827946753@163.com;通信作者:卢贝丽(1984-),女,教授,主要从事生物质基功能炭材料的高效利用及其性能研究,E-mail:lubeilihello@126.com。
