Characterization and Process Optimization of Transition Metal Compound Catalyst in CWAO Applications

摘要

On simulated organic wastewater treatment by catalytic wet oxidation (CWAO) experiments, the transition metal compound Cu-Fe-La/FSC catalysts were characterized by SEM, TEM and FT-IR, and its application in CWAO reaction process conditions were optimized. Catalyst characterization experiments show that the active components on the surface of the Cu-Fe-La/FSC uniformly distribute, and the particle size is 10 to 50 nm; the chemical composition of -OH- and -Al-O-key are remarkable. To optimize the operation process with the orthogonal experiments of catalytic wet air oxidation (CWAO), the results show that in the five factors of influencing COD_(Cr) removal rates of wastewater, they are arranged according to the influences on water treatment from high to low: catalyst dose, system total pressure, influent concentration, reaction temperature, reaction time. The optimized operating conditions: catalyst dose of 8 g/L, total system pressure of 2.0 MPa, influent concentration of 3000 mg/L, reaction temperature of 180°C, reaction time of 60 min. Under the optimized operating conditions, the COD_(Cr) removal rate of simulated wastewater reached 77.9%.