Study of the effect of different mixed media on the catalytic activity and structural characteristics of catalysts of Bi2MoXW1-XO6
A series of Bi2MoxW1-xO6 catalysts supported on Al2O3-SiO2, SiO2-TiO2 and activatedcarbon (C*) were synthesized. The aim was to compare the different supports and calcination temperature of catalysts, studying their efficiency and activation temperature in the CO oxidation reaction. The catalysts ac...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/45634 |
| Acceso en línea: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/45634 |
| Access Level: | acceso abierto |
| Palabra clave: | catalytic activity carbon monoxide oxidation mixed oxides supported catalyst actividad catalítica la oxidación de monóxido de carbono óxidos mixtos catalizador soportado |
| Sumario: | A series of Bi2MoxW1-xO6 catalysts supported on Al2O3-SiO2, SiO2-TiO2 and activatedcarbon (C*) were synthesized. The aim was to compare the different supports and calcination temperature of catalysts, studying their efficiency and activation temperature in the CO oxidation reaction. The catalysts active phase, Bi2MoxW1-xO6, was made by means of chemical precipitation procedure starting from high purity (NH4)6Mo7O24•4H2O, (NH4)6W12O6•H2O, Bi(NO3)2•5H2O compounds, which afterwards, were supported on Al2O3-SiO2, SiO2-TiO2 and C* through impregnation. The catalysts characterization was carried out by means of X ray diffraction analysis (XRD), scanning electron microscopy (SEM) and surface area determination (BET method). Regarding the catalytic activity the Bi2MoxW1-xO6 /C* compound synthesized at 500 ºCwas the best catalyst being activated at 125 ºC reaching 90 % conversion. It is concluded that was observed an effect of calcination temperature and the support on the different values reached for the catalytic activity. |
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