CINDECA 05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Rol del Co sobre la actividad reductora de Pd/ZrO2SO4= para la Reducción Selectiva de NO por metano
Autor/es:
ALDO A RUBERT; CLAUDIA QUINCOCES; MARÍA GLORIA GONZÁLEZ
Lugar:
Benalmadena-Malaga- España
Reunión:
Simposio; XXI SICAT; 2008
Institución organizadora:
FISOCAT
Resumen:
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En este trabajo se analiza el efecto cooperativo del Co sobre el catalizador de Pd/ZrO2SO4= para la reducción catalítica selectiva de NO por metano. Los catalizadores bimetálicos de CoPd/ZrO2SO4= muestran una mayor actividad y estabilidad que los catalizadores monometálicos sobre las mismas condiciones de reacción. El mejor resultado se obtuvo para el catalizador bimetálico pretratado en el medio de reacción a 645oC por una hora. Bajo condiciones secas el Co(2%) Pd (0,2%)/ ZrO2SO4= mostró una conversión de 40% de NO a N2 a GHSV=30000 h-1 con una relación CH4/NO=4 a 460oC y 2% de oxígeno en la alimentación. El agregado de 6% de agua en la alimentación produce un decrecimiento parcial de la actividad reductora, la cual se asocia a la eliminación de especies sulfato del soporte y la formación de PdO y Co3O4 ambos responsables de favorecer la selectividad hacia la combustión de metano . Los resu ltados de XPS, Uv-vis DRS y espectroscopia Raman revelan la presencia de los óxidos y la desulfuración del soporte para las muestras tratadas en alimentación con agua.
Palabras clave: RSC de NO; catalizadores de Co y/o Pd; metano; ZrO2SO4=
