Sulfur resistance of Pt-W catalysts
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Título: | Sulfur resistance of Pt-W catalysts |
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Autor/es: | Betti, Carolina P. | Badano, Juan M. | Rivas, Ivana L. | Mazzieri, Vanina A. | Maccarrone, M. Juliana | Coloma, Fernando | Vera, Carlos R. | Quiroga, Mónica E. |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Servicios Técnicos de Investigación |
Palabras clave: | Sulfur resistance | Pt catalysts | Bimetallic Pt-W catalysts | Selective hydrogenation | Styrene |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 2013 |
Editor: | Hindawi Publishing Corporation |
Cita bibliográfica: | Journal of Chemistry, vol. 2013, Article ID 502014, 8 pages, 2013. doi:10.1155/2013/502014 |
Resumen: | The sulfur resistance of low-loaded monometallic Pt catalysts and bimetallic Pt-W catalysts during the partial selective hydrogenation of styrene, a model compound of Pygas streams, was studied. The effect of metal impregnation sequence on the activity and selectivity was also evaluated. Catalysts were characterized by ICP, TPR, XRD, and XPS techniques. Catalytic tests with sulfur-free and sulfur-doped feeds were performed. All catalysts showed high selectivities (>98%) to ethylbenzene. Activity differences between the catalysts were mainly attributed to electronic effects due to the presence of different electron-rich species of Pt0 and electron-deficient species of Ptδ+. Pt0 promotes the cleavage of H2 while Ptδ+ the adsorption of styrene. The catalyst successively impregnated with W and Pt (WPt/Al) was more active and sulfur resistant than the catalyst prepared with an inverse impregnation order (PtW/Al). The higher poison resistance of WPt/Al was attributed to both steric and electronic effects. |
Patrocinador/es: | UNL, CONICET, and ANPCyT. |
URI: | http://hdl.handle.net/10045/36067 |
ISSN: | 2090-9063 (Print) | 2090-9071 (Online) |
DOI: | 10.1155/2013/502014 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | Copyright © 2013 Carolina P. Betti et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1155/2013/502014 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
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