Study on wet air oxidation of phenol catalyzed by LaFeO₃ perovskite

In this paper, four kinds of LaFeO₃ perovskite catalytic materials with different ball milling time were prepared by solid phase milling method and used to catalyze the wet air oxidation of phenol. The effect of milling time on the performance of LaFeO₃ perovskite catalyst for wet air oxidation of phenol aqueous solution was investigated. LaFeO₃ perovskite catalytic materials were characterized by XRD, H₂-TPR, TG-DTA, FT-IR, N₂ physical adsorption and XPS. The results show that when the reaction temperature is 200 ℃, the air pressure is 5 MPa and the initial concentration of phenol is 4000 mg/L, the final COD removal rate of LaFeO₃-6 catalytic material is 94.5% after catalytic oxidation of 240 min.