| Revista: | Quimica nova |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000196050 |
| ISSN: | 0100-4042 |
| Autores: | Cataluña, Renato1 Baibich, Ione M Dallago, R. M Martínez Arias, A Soria, J |
| Instituciones: | 1Universidade Federal do Rio Grande do Sul, Instituto de Quimica, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade Federal do Rio Grande do Sul, Escola de Engenharia, Porto Alegre, Rio Grande do Sul. Brasil 3Instituto de Catálisis y Petroleoquímica, Madrid. España |
| Año: | 2001 |
| Periodo: | Ene-Feb |
| Volumen: | 24 |
| Número: | 1 |
| Paginación: | 55-59 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, descriptivo |
| Resumen en inglés | The kinetic parameters for the CO oxidation reaction using copper/alumina-modified ceria as catalysts were determined. The catalysts with different concentrations of the metals were prepared using impregnation methods. In addition, the reduction-oxidation behaviour of the catalysts were investigated by temperature-programmed reduction. The activity results show that the mechanism for CO oxidation is bifunctional : oxygen is activated on the anionic vacancies of ceria surface, while carbon monoxide is adsorbed preferentially on the higher oxidation copper site. Therefore, the reaction occurs on the interfacial active centers. Temperatures-programmed Reduction patterns show a higher disperdion when cerium oxide is present |
| Disciplinas: | Química |
| Palabras clave: | Química analítica, Química orgánica, Catalizadores, Oxidación, Monóxido de carbono, Temperatura, Temperatura programada, Cinética, Oxido de cerio, Reducción, Alúmina |
| Keyword: | Chemistry, Analytical chemistry, Organic chemistry, Catalysts, Oxidation, Carbon monoxide, Temperature, Temperature programmed, Kinetic, Cerium oxide, Reduction, Alumina |
| Texto completo: | Texto completo (Ver HTML) |
