Wet oxidation of phenol catalyzed by unpromoted and platinum-promoted manganese/cerium oxide
- Laval Univ., Quebec (Canada). Dept. of Chemical Engineering
- Univ. de Buenos Aires (Argentina)
Manganese/cerium composite oxide (MnO{sub 2}/CeO{sub 2}) proved to be a potent solid catalyst for the catalytic wet oxidation (CWO) of aqueous phenol under mild treatment conditions (80--130 C, 0.5 MPa O{sub 2} pressure). Despite the fact this catalyst exhibited an important activity in eliminating completely phenol and total organic carbon (TOC), its poor selectivity to CO{sub 2} was demonstrated as a result of deposition on the catalyst surface of carbonaceous deposits with high carbon content. Promotion of MnO{sub 2}/CeO{sub 2} with platinum improved the CO{sub 2} yield of phenol oxidation. Evidence for the reduction of the carbonaceous deposit over Pt-MnO{sub 2}/CeO{sub 2} was confirmed via elemental analysis and temperature-programmed oxidation (TPO). Surface analysis by X-ray photoelectron spectroscopy (XPS) indicated that the deposits built up more on cerium than on manganese and that platinum increased the aromaticity of the deposit.
- OSTI ID:
- 655533
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 9 Vol. 37; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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