Hydrogen from glycerol steam reforming with a platinum catalyst supported on a SiO<sub>2</sub>-C composite
This work studies 2 wt% Pt catalysts. The support is a SiO<sub>2</sub>-C composite whose main features are a high specific surface due to its mesoporosity, a higher thermal stability than the C support, and the absence of surface acid sites which could promote the dehydration reactions t...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/102956 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/102956 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Exactas Hydrogen Platinum Steam reforming Glycerol |
| Sumario: | This work studies 2 wt% Pt catalysts. The support is a SiO<sub>2</sub>-C composite whose main features are a high specific surface due to its mesoporosity, a higher thermal stability than the C support, and the absence of surface acid sites which could promote the dehydration reactions that produce coke precursors. The Pt/SiO<sub>2</sub>-C catalyst has very small metallic particles (d<sub>va</sub> = 1.37 nm) that favor the C-C bond cleavage reactions which allow obtaining total gas conversion at 450C. With this catalyst, it is possible to obtain high yields to H<sub>2</sub>, between 4 and 5, which indicates that the active sites promote the WGS reaction, even with glycerol concentrations of 30 and 50%. Pt/SiO<sub>2</sub>-C is a very stable catalyst since it loses only 10% of its initial activity after 66 h on stream and is resistant to sintering and coke deposition. |
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