| 초록 |
Wet air oxidation is the liquid phase oxidation of organics at elevated temperatures (125-320℃) and pressures (0.5-20MPa) using molecular oxygen as oxidant. Wet oxidation is suitable for the treatment of the wastewater which is too concentrated and/or toxic to be treated with biological approach because any organic compound could be ideally mineralized to the desired end product by wet oxidation. In this work, CuOx/TiO2 catalysts with different copper loadings were prepared and characterized. Copper oxide catalysts supported on TiO2 with 1-25 wt% loading of each metal were prepared by incipient wetness impregnation method using Cu(NO3)22.5H2O as the precursors of copper. Their activity for wet air oxidation of phenol was investigated in a batch reactor (150℃, 5.05MPa): initial phenol concentration 1,000 ppm of the liquid phase, catalyst loading 3g/L. The phenol concentration and the TOC concentration of each sample were examined using a HPLC system and TOC analyzer. The prepared and used catalysts were characterized by N2 adsorption, XRD, TPR, and XANES experiments. The optimum copper loading of CuOx/TiO2 catalyst was found for the wet air oxidation of phenol. |
