NOx reduction to N2 with commercial fuel in a real diesel engine exhaust using a dual bed of Pt/beta zeolite and RhOx/ceria monolith catalysts
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Título: | NOx reduction to N2 with commercial fuel in a real diesel engine exhaust using a dual bed of Pt/beta zeolite and RhOx/ceria monolith catalysts |
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Autor/es: | Rico Pérez, Verónica | García Cortés, Jorge Manuel | Salinas Martínez de Lecea, Concepción | Bueno López, Agustín |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | deNOx | deN2O | SCR | Pt catalyst | RhOx catalyst | Monolith catalyst |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 18-dic-2013 |
Editor: | Elsevier |
Cita bibliográfica: | Chemical Engineering Science. 2013, 104: 557-564. doi:10.1016/j.ces.2013.09.052 |
Resumen: | The Selective Catalytic Reduction (SCR) of NOx has been performed in a real diesel engine exhaust using commercial diesel fuel as a reducing agent and a dual bed catalytic system consisting of a Pt/beta zeolite/honeycomb monolith SCR catalyst located upstream a N2O decomposition RhOx/Ce0.9Pr0.1O2/honeycomb monolith catalyst. Cordierite honeycomb monoliths (diameter 2.3 cm; length 7.5 cm; 400 cpsi) were washcoated with beta zeolite and 1% platinum (on zeolite basis) was impregnated afterwards. The effect of the beta zeolite slurry viscosity on the dip-coating process was studied in detail, concluding that slurries with viscosity ≤23 mPa s must be used, otherwise the zeolite suspension was not able to penetrate into the monolith channels. The dip-coating method was optimized for the Pt/beta zeolite/honeycomb monolith preparation. The RhOx/Ce0.9Pr0.1O2/honeycomb monolith catalyst, used for N2O decomposition, was prepared by nitrate precursor decomposition. The maximum NOx removal achieved with the Pt/beta zeolite/honeycomb monolith was 50% at 350 °C. The production of N2O as undesired NOx reduction product, which is a drawback of platinum SCR catalysts, has been solved by using the dual bed configuration, where both monolith catalysts operated at the same temperature, and 100% N2 selectivity has been obtained. |
Patrocinador/es: | The authors thank the financial support of Generalitat Valenciana (Project Prometeo 2009/047), the Spanish ministries of Economy and Competitiveness (Project CTQ2012-30703) and Science and Innovation (Project CIT-420000-2009-48), and EU for the FEDER resources. |
URI: | http://hdl.handle.net/10045/40167 |
ISSN: | 0009-2509 (Print) | 1873-4405 (Online) |
DOI: | 10.1016/j.ces.2013.09.052 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.ces.2013.09.052 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas |
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Archivo | Descripción | Tamaño | Formato | |
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2013_Rico_etal_CES_final.pdf | Versión final (acceso restringido) | 1,04 MB | Adobe PDF | Abrir Solicitar una copia |
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