Effect of preparation condition on performance of Ag-MoO3/ZrO2 catalyst for direct epoxidation of propylene by molecular oxygen

The Ag-MoO3/ZrO2 catalyst for an epoxidation of propylene by molecular oxygen was prepared and characterized by N2 adsorption, XRD, NH3-TPD and CO2-TPD. For the Ag-MoO3/ZrO2 catalyst, the lower surface area, larger pore size, modest and weaker surface acidity-basicity and suitably larger particle size of Ag are in favor of the formation of propylene oxide, which can be controlled by optimizing the preparation conditions of the ZrO2 support and catalyst.