Reforming of CH4 with CO2 on Pt-supported catalysts: Effect of the support on the catalytic behaviour
This paper reports a study about the behaviour of different Pt-based catalysts supported on Al2O3, Na-Al2O 3, K-Al2O3 and ZrO2 in methane reforming with CO2. Results indicate that Pt/Na (0.3 wt%)-Al 2O3 and Pt/ZrO2 catalysts show both a good activity and selectivity with a very high catalytic stabil...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/78037 |
| Acceso en línea: | http://hdl.handle.net/11336/78037 |
| Access Level: | acceso abierto |
| Palabra clave: | Catalytic Stability Dry Reforming Metallic Supported Catalysts https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | This paper reports a study about the behaviour of different Pt-based catalysts supported on Al2O3, Na-Al2O 3, K-Al2O3 and ZrO2 in methane reforming with CO2. Results indicate that Pt/Na (0.3 wt%)-Al 2O3 and Pt/ZrO2 catalysts show both a good activity and selectivity with a very high catalytic stability at 1073 K. The Pt/K (0.3 wt%)-Al2O3 catalyst showed a good performance but a slightly lower conversion level than Pt/Na (0.3 wt%)-Al2O 3. On the other hand, the Pt/Al2O3 catalyst displayed an important decrease of the methane conversion through the reaction time at 1073 K and hence, a lower catalytic stability due mainly to the carbon deposition. It can be concluded that either Na or K addition to Pt/Al 2O3 enhances the catalytic stability since they provide basic sites, which favour the dissociation reaction of CO2 into CO and O. The O species can react with the carbon deposited on the Pt, thus cleaning the metallic phase of the doped catalysts. |
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