%0 Journal Article
%T Sinergia en la reducci車n catal赤tica selectiva de no x sobre ferritas Cu1-x co xFe2o4 Synergy in the selective catalytic reduction of no x over Cu1-x co xFe2o4 ferrites
%A Sarah Briceˋo
%A Vicente Sagredo
%A Hector Del Castillo
%J Revista Latinoamericana de Metalurgia y Materiales
%D 2012
%I Universidad Sim車n Bol赤var
%X Nanopart赤culas de ferritas del tipo Cu1-X CoX Fe2O4, se sintetizaron utilizando el m谷todo sol-gel de auto-combusti車n y se caracterizaron usando las t谷cnicas: An芍lisis termo gravim谷trico (TGA), An芍lisis t谷rmico diferencial (DTA), Difracci車n de rayos X (DRX), Microscop赤a electr車nica de barrido (MEB), Microscop赤a electr車nica de transmisi車n (MET), 芍rea superficial (BET), Espectroscopia de rayos X (XPS), Termo reducci車n a temperatura programada (TPR) y Termo desorci車n a temperatura programada (TPD). Las nanopart赤culas obtenidas con un tama o promedio de 100 nm y de forma esf谷rica, mostraron formaci車n de conglomerados. Las pruebas catal赤ticas revelaron que las ferritas Cu1-X CoX Fe2O4, son catalizadores eficientes para la Reducci車n catal赤tica selectiva de NOx (RCS-NOx), usando un hidrocarburo como agente reductor, alcanzando una conversi車n m芍xima de 40% de NO a 350∼C y un 95% de selectividad hacia la formaci車n de N2 debido a la influencia de los metales Cu2+ yCo2+ sugiriendo la presencia de un efecto sin谷rgico en el sistema Cu1-xCo xFe2O4. Ferrite nanoparticles of Cu1-X CoX Fe2O4, were synthesized by sol-gel auto-combustion method and characterized using the techniques: Thermo gravimetric (TGA), Differential Thermal Analysis (DTA), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Surface area (BET), X-ray spectroscopy (XPS), Temperature programmed reduction (TPR) and Temperature programmed desorption (TPD). The obtained particles with an average size of 100 nm and spherical shape. The catalytic tests revealed that the Cu1-X CoX Fe2O4 ferrites are efficient catalysts for the Selective Catalytic Reduction of NOx (SCR-NOx), using a hydrocarbon as a reducing agent in the range of 250-450 oC, obtaining a maximum conversion of 40% NO and 95% selectivity towards the formation of N2, suggesting the presence of a synergistic effect between Cu2+ and Co2+ in the system Cu1-xCo xFe2O4.
%K ferritas
%K nanopart赤culas
%K Cu1-X CoX Fe2O4
%K sol-gel
%K RCS-NOx
%K ferrites
%K nanoparticles
%K Cu1-X CoX Fe2O4
%K sol-gel
%K SCR-NOx
%U http://wwww.scielo.org.ve/scielo.php?script=sci_arttext&pid=S0255-69522012000100015