NOx reduction composition for use in FCC processes

   
   

A composition for controlling NO.sub.x emissions during FCC processes comprises (i) an acidic oxide support, (ii) cerium oxide, (iii) a lanthanide oxide other than ceria such as praseodymium oxide, and (iv), optionally, an oxide of a metal from Groups Ib and IIb such as copper, silver and zinc.

Una composición para controlar emisiones de NO.sub.x durante procesos de la FCC abarca (i) una ayuda ácida del óxido, (ii) óxido del cerio, (iii) un óxido del lanthanide con excepción de ceria tal como óxido del praseodymium, y (iv), opcionalmente, un óxido de un metal de los grupos Ib e IIb tal como cobre, plata y cinc.

 
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