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...
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| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/102956 https://www.sciencedirect.com/science/article/abs/pii/S0360319917313678?via%3Dihub |
| Aporte de: |
| 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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