负载型固体碱催化剂制备生物柴油

Synthesis of Biodiesel by Transesterification with Supported Solid Base Catalysts

采用原位沉淀法合成磁性纳米固体碱催化剂CaCO_3/Fe_3O_4和ZnO/Fe_3O_4,考察了催化剂制备过中Fe_3O_4的掺杂量对催化剂性能的影响,确定CaCO_3/Fe_3O_4最佳掺杂量为7∶1。将制备的纳米磁性固体碱催化剂用于催化菜籽油与甲醇酯交换反应制备生物柴油,实验结果表明,CaCO_3/Fe_3O_4可有效提高生物柴油产率,具有较高的催化活性。实验研究了制备生物柴油的反应时间和反应温度对酯化率的影响,确定最佳反应时间为3 h,最佳反应温度为65℃。

The magnetic nano solid base catalysts CaCO3/Fe3O4 and ZnO/Fe3O4 were synthesized by in-situ precipitation method. The optimum conditions for the catalyst preparation were studied. The optimal doping amount of CaCO3/Fe3O4 was 7 ： 1. The catalysts were used to catalyze the transesterifieation reaction of colleseed oil and methanol for preparation of biodiesel. The result showed the yield of biodiesel was increased by CaCO3/Fe3O4. The catalyst had high catalytic activity. The effects of reaction time and reaction temperature on esterification rate were studied. The optimal reaction time was 3 h, and the reaction temperature was 65 ℃.