负载型Cs_2O固体碱催化剂的制备及催化酯交换反应性能

Preparation of supported Cs_2O solid base catalysts and performance of catalyzing transesterification reaction

以Cs2CO3作为催化剂前驱体,利用γ-Al2O3、TiO2、MgO、SiO2、CaO和NaY型分子筛6种不同的载体,在700℃下焙烧,制备Cs2O固体碱催化剂,并用其催化菜籽油酯交换反应制取生物柴油。结果表明,以γ-Al2O3、MgO和CaO均能制备出超强固体碱,根据制备出的固体碱催化酯交换反应的酯交换率和产物分离性能分析,γ-Al2O3是最适合的载体。以Cs2CO3为前驱体,以γ-Al2O3为载体开展的催化剂试验结果表明:固体碱的最佳制备工艺条件为:煅烧温度700℃,煅烧时间5h,煅烧气氛为N2。在此工艺条件下,制取的催化剂用于催化菜籽油的酯交换率达到了95.5%。

Supported Cs2O solid base catalysts were prepared with Cs2CO3 as catalyst precursors andγ-Al2O3,MgO, CaO,TiO2,SiO2 and NaY molecular sieve as supports at calcination temperature of 700℃.These catalysts were used to catalyze transesterification reaction for biodiesel production from rapeseed oil.The results showed that solid super bases could be prepared withγ-Al2O3,MgO and CaO,andγ-Al2O3 was the optimal support considering both transesterification ratio and separation performance.The optimal process conditi...