| 초록 |
In this work, transesterification of glycerol with DMC to yield glycerol carbonate (GC) was examined using highly ordered mesoporous ZrO2, SnO2 and CeO2 with high surface areas as supports to load the basic sites LiAlO2 by incipient wetness impregnation method. The synthesized catalysts were characterized using various physicochemical characterization techniques, namely, XRD, N2–sorption, CO2-TPD and FT-IR. In the transesterification reaction, LiAlO2/CeO2 exhibited the best catalytic activity, due to the number of basic sites existed on the surface of catalyst, indicated that the basicity of supported LiAlO2 catalysts was found to be highly dependent on the nature of the supports. The mesoporous LiAlO2/CeO2 catalysts with different LiAlO2 loadings (5~20) wt.% also prepared and tested for transesterification reaction. The results revealed that the transesterification activity depended on the amount of LiAlO2 loading and calcinations temperature of the catalysts. The effect of reaction conditions such as DMC/glycerol molar ratio, reaction temperature, and catalyst amount were also discussed. |
