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Catalytic wet oxidation of phenol over PtxAg1−xMnO2/CeO2 catalysts |
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| Authors: | S. Hamoudi A. Sayari K. Belkacemi L. Bonneviot F. Larachi |
| Affiliation: | a Department of Chemical Engineering & CERPIC, Laval University, Laval, Que., Canada G1K 7P4 b Department of Food Science & Nutrition, Laval University, Laval, Que., Canada G1K 7P4 c Department of Chemistry & CERPIC, Laval University, Laval, Que., Canada G1K 7P4 |
| Abstract: | Catalytic wet oxidation reactions of aqueous phenol over unpromoted, base- and noble-metal promoted MnO2/CeO2 catalysts were carried out under mild conditions (80–130°C, 0.5 MPa O2) in a batch slurry reactor. Even though the catalyst-mediated oxidation was very effective in destroying phenol, only a moderate selectivity toward complete mineralization into CO2 and H2O was attained due to parallel formation of deactivating carbonaceous deposits. Promotion of the mixed-oxide catalysts with platinum and/or silver enhanced the mineralization selectivity and reduced appreciably the amount of deposits. |
| Keywords: | Catalytic wet oxidation Noble metal promotion Cerium and manganese oxides Phenol oxidation |
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