Sulfur Resistance of Pt-W Catalysts
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 w...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/502014 |
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| author | Carolina P. Betti Juan M. Badano Ivana L. Rivas Vanina A. Mazzieri M. Juliana Maccarrone Fernando Coloma-Pascual Carlos R. Vera Mónica E. Quiroga |
| author_facet | Carolina P. Betti Juan M. Badano Ivana L. Rivas Vanina A. Mazzieri M. Juliana Maccarrone Fernando Coloma-Pascual Carlos R. Vera Mónica E. Quiroga |
| author_sort | Carolina P. Betti |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-7bd8fad8f96145fe9c558aafa0f02b83 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-7bd8fad8f96145fe9c558aafa0f02b832025-02-03T01:12:29ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/502014502014Sulfur Resistance of Pt-W CatalystsCarolina P. Betti0Juan M. Badano1Ivana L. Rivas2Vanina A. Mazzieri3M. Juliana Maccarrone4Fernando Coloma-Pascual5Carlos R. Vera6Mónica E. Quiroga7Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaFacultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, SpainInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaInstituto de Investigaciones en Catálisis y Petroquímica (INCAPE), FIQ, UNL-CONICET, Santiago del Estero 2654, S3000AOJ Santa Fe, ArgentinaThe 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.http://dx.doi.org/10.1155/2013/502014 |
| spellingShingle | Carolina P. Betti Juan M. Badano Ivana L. Rivas Vanina A. Mazzieri M. Juliana Maccarrone Fernando Coloma-Pascual Carlos R. Vera Mónica E. Quiroga Sulfur Resistance of Pt-W Catalysts Journal of Chemistry |
| title | Sulfur Resistance of Pt-W Catalysts |
| title_full | Sulfur Resistance of Pt-W Catalysts |
| title_fullStr | Sulfur Resistance of Pt-W Catalysts |
| title_full_unstemmed | Sulfur Resistance of Pt-W Catalysts |
| title_short | Sulfur Resistance of Pt-W Catalysts |
| title_sort | sulfur resistance of pt w catalysts |
| url | http://dx.doi.org/10.1155/2013/502014 |
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