Optimized wet-proofed CuO/Al2O3 catalysts for the oxidation of phenol solutions: Enhancing catalytic stability
An optimized wet-proofed catalyst was prepared by successive immersion steps of conventional 37% CuO/γ-Al2O3 samples in a polytetrafluorethylene fibres suspension. Conventional and hydrophobic catalysts were tested for the oxidation of phenol solutions (5 g/L), at 140 °C and 7 atm of oxygen pressure...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/35057 |
| Acceso en línea: | http://hdl.handle.net/11336/35057 |
| Access Level: | acceso abierto |
| Palabra clave: | Hydrophobic Catalysts Ptfe Phenol Oxidation Cwao https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | An optimized wet-proofed catalyst was prepared by successive immersion steps of conventional 37% CuO/γ-Al2O3 samples in a polytetrafluorethylene fibres suspension. Conventional and hydrophobic catalysts were tested for the oxidation of phenol solutions (5 g/L), at 140 °C and 7 atm of oxygen pressure, in a trickle bed reactor. For the conventional catalyst, phenol conversion decreased with reaction time. However, for the wet-proofed catalysts, phenol conversion levels remained almost constant with usage. The hydrophobic layer improved catalyst stability: prevented the formation of domains with cuprous species, minimized the solubilization of Cu2+ and the formation of bohmite phase during reaction. |
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