| 초록 |
Acetalization of glycerol has a great industrial importance due to the large production of glycerol in biodiesel industry. The products of glycerol acetalization have been widely used as fuel additives, surfactant bases and scents in cosmetic industries. In this research, glycerol conversion with acetone has been studied using mesoporous WO3/rod-type SBA-15 as a catalyst. A series of WO3/rod-type SBA-15 catalyst with varying WO3 loadings (5-20wt%) were prepared by wetness impregnation method using tungsten precursor. The catalysts were physicochemically characterized with X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), N2 adsorption-desorption analysis and NH3 temperature-programmed desorption (NH3-TPD). Among the catalysts, 15wt% WO3/rod-type SBA-15 was found to be the most active catalyst in acetalization reaction at 30℃. The catalyst exhibited 99% glycerol conversion with 97% selectivity for five-membered (1,3-dioxolane) cyclic product. The excellent performance of the catalyst is mainly due to their high specific surface areas, high pore volumes and strong surface acid properties. These results suggest that WO3/rod-type SBA-15 is highly active catalyst for the acetalization of glycerol. |
