A comparative study on porous solid acid oxides as catalysts in the esterification of glycerol with acetic acid
作者:Antonio B.S. Neto、Alcineia C. Oliveira、Enrique Rodriguez-Castellón、Adriana F. Campos、Paulo T.C. Freire、Francisco F.F. Sousa、Josué M. Filho、Jesuina C.S. Araujo、Rossano Lang
DOI:10.1016/j.cattod.2018.05.057
日期:2020.6
(NH3-TPD) and Fourier transform infrared spectroscopy (FTIR). Esterification of glycerol into acetins reaction was evaluated over two series of SiAl-based solids. Both series displayed very good activity as well as selectivity towards the acetins within a short reaction time. However, porous SiAl deactivated due to acid sites leaching in long-term catalytic runs. The tuning of the loadings of the molybdophosphoric
合成了由多孔SiAl以及钼磷杂多酸负载的SiAl纳米管组成的酸催化剂。通过扫描电子显微镜与能量色散X射线光谱法(SEM-EDS)耦合,透射电子显微镜(TEM),X射线衍射(XRD),X射线光电子能谱(XPS),全程氨解吸( NH 3-TPD)和傅里叶变换红外光谱(FTIR)。在两个系列的基于SiAl的固体上评估了甘油酯化成乙酸酯反应的过程。这两个系列在很短的反应时间内都显示出非常好的活性以及对醋精的选择性。然而,由于长期催化运行中的酸性部位浸出,多孔SiAl失活了。调整SiAl埃洛石纳米管上的钼磷含量可导致对单,双和三醋精的选择性增加。这些催化剂也可循环使用多达三遍,并且由于钼磷负载的SiAl纳米管的酸度,稳定的结构和孔隙率的结合,获得了17%的转化率和100%的三醋精选择性。