Affiliations: School of Municipal and Environmental Engineering,
Harbin Institute of Technology, Harbin 150001, China | School of Environmental Science and Technology,
Shanghai Jiaotong University, Shanghai 200240, China | School of Chemistry and Environmental Engineering,
Harbin University of Science and Technology, Harbin 150080, China
Abstract: Four metal oxide catalysts composed of copper (Cu), stannum (Sn),
copper-stannum (Cu-Sn) and copper-cerium (Cu-Ce) respectively were prepared by
the co-impregnation method, and
γ-alumina(γ-Al_2O_3) is
selected as support. A first-order kinetics model was established to study the
catalytic wet air oxidation of phenol at different temperature when these
catalysts were used. The model simulations are good agreement with present
experimental data. Results showed that the reaction rate constants can be
significantly increased when catalysts were used, and the catalyst of 6%
Cu-10% Ce/γ-Al_2O_3 showed the best catalytic activity.
This is consistent with the result of catalytic wet air oxidation of phenol and
the COD removal can be arrived at 98.2% at temperature 210°C,
oxygen partial pressure 3 MPa and reaction time 30 min. The activation energies
of each reaction with different catalysts are nearly equal, which is found to
be about 42 kJ/mol and the reaction in this study is proved to be kinetics
control.
Keywords: catalytic wet air oxidation, catalyst, phenol
