| 초록 |
A series of catalysts, NiSO4/TiO2-ZrO2 having different TiO2-ZrO2 composition, for acid catalysis was prepared by the impregnation method using an aqueous solution of nickel sulfate. The addition of TiO2 to ZrO2 enhanced its acidity remarkably because of the formation of new acid sites through the charge imbalance of Ti-O-Zr bonding. The binary oxide, TiO2-ZrO2 calcined above 600 ˚C resulted in the formation of crystalline orthorhombic phase of ZrTiO4. Therefore, NiSO4/TiO2-ZrO2 calcined at 500 ˚C exhibited a maximum catalytic activity for acid catalysis, and then the catalytic activity decreased with the calcination temperature. |
