Selective catalytic reduction of NOx with NH3 using ZSM5 with low content of copper
A comprehensive experimental and characterization study of selective catalytic reduction of NOx with NH3 was carried out on Cu-ZSM5 catalysts, previously prepared by the aqueous ion exchange method with a copper loading of 0.2, 1 and 2 %. Results showed that even with Cu contents as low as 2 % over...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | México |
| Institución: | Universidad Autónoma de Nuevo León |
| Repositorio: | Redalyc-UANL |
| OAI Identifier: | oai:redalyc.org:94245632001 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=94245632001 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas ZSM NOx Ammonia Selective catalytic reduction |
| Sumario: | A comprehensive experimental and characterization study of selective catalytic reduction of NOx with NH3 was carried out on Cu-ZSM5 catalysts, previously prepared by the aqueous ion exchange method with a copper loading of 0.2, 1 and 2 %. Results showed that even with Cu contents as low as 2 % over zeolite, NOx conversions higher than 92 % are obtained at 600 ºC. The copper catalysts were characterized using FT-IR, XRD, UV-Visible and with studies such as SEM, STEM and HRTEM, where the presence of CuO cores were shown to enhance the de-NOx activity, due to their higher thermal stability compared with the other copper species found. The predominance of dispersed 4-5 nm particles over the zeolite was identified, which accounts for the high NOx conversion results shown in SCR process. |
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