刘同慧, 刘宏乾, 褚格, 毕世楠, 于峰, 潘大海, 范彬彬, 李瑞丰. CaO/KIT-6固体碱催化剂的制备及其在酯交换反应中的催化性能[J]. 燃料化学学报（中英文）, 2021, 49(3): 321-328. DOI: 10.1016/S1872-5813(21)60024-5
引用本文: 刘同慧, 刘宏乾, 褚格, 毕世楠, 于峰, 潘大海, 范彬彬, 李瑞丰. CaO/KIT-6固体碱催化剂的制备及其在酯交换反应中的催化性能[J]. 燃料化学学报（中英文）, 2021, 49(3): 321-328. DOI: 10.1016/S1872-5813(21)60024-5
shu
LIU Tong-hui, LIU Hong-qian, CHU Ge, BI Shi-nan, YU Feng, PAN Da-hai, FAN Bin-bin, LI Rui-feng. Preparation of CaO/KIT-6 solid base catalyst and its catalytic performance in transesterification[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 321-328. DOI: 10.1016/S1872-5813(21)60024-5
Citation: LIU Tong-hui, LIU Hong-qian, CHU Ge, BI Shi-nan, YU Feng, PAN Da-hai, FAN Bin-bin, LI Rui-feng. Preparation of CaO/KIT-6 solid base catalyst and its catalytic performance in transesterification[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 321-328. DOI: 10.1016/S1872-5813(21)60024-5
shu

CaO/KIT-6固体碱催化剂的制备及其在酯交换反应中的催化性能

Preparation of CaO/KIT-6 solid base catalyst and its catalytic performance in transesterification

    摘要
  • 摘要: 采用浸渍法将活性氧化钙颗粒负载在介孔二氧化硅（KIT-6）表面，制备了酯交换反应催化剂CaO/KIT-6，并研究了其在大豆油与甲醇酯交换制备生物柴油反应中的催化性能。通过X射线衍射（XRD）、X射线光电子能谱（XPS）、CO2程序升温脱附（CO2-TPD）等测试手段对催化剂进行表征。在酯交换反应中，当醇油物质的量比为12、反应温度为65 °C、催化剂用量为8%、Ca/Si原子比为0.4、反应时间为2 h时，生物柴油转化率达到99.9%，CaO/KIT-6重复使用五次后催化活性仍保持在90%以上。与CaO及其他负载型催化剂相比，CaO/KIT-6催化剂在较低醇油物质的量之比、较短反应时间展现出更高的催化性能和良好的重复使用性。

     

    Abstract: CaO/KIT-6 was successfully prepared by loading activated calcium oxide particles on the surface of mesoporous silica (KIT-6) by post-synthesis method and tested for the transesterification of soybean oil with methanol. The catalyst was characterized by XRD, XPS, CO2-TPD, N2 adsorption-desorption and TEM. It is found that when the molar ratio of methanol to oil is 12, the reaction temperature is 65 °C, the addition of catalyst is 8% and the Ca/Si atomic ratio is 0.4, the conversion of soybean oil exceeds 99.9% at 2 h. After 5 cycles, the catalytic activity decreases slightly and the conversion is still up to 90%. Compared with CaO and other supported catalysts, CaO/KIT-6 catalyst exhibits higher catalytic performance and good reusability at lower methanol-to-oil molar ratio.

     

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