Catalysis Letters, Vol.56, No.2-3, 111-117, 1998
Redispersion of Pd on acidic supports and loss of methane combustion activity during the selective reduction of NO by CH4
The CH4 combustion, occurring under selective NO reduction conditions, has been investigated over several Pd catalysts. Ln the presence of NO and support acidity, the combustion activity of Pd is drastically inhibited. Highly dispersed Pd/acidic zeolites compare favorably with other SCR catalysts. At 500 degrees C, a 0.3% Pd/H-ZSM-5 sample exhibited a better performance than a typical Co-ZSM-5 catalyst.
Keywords:ABSORPTION FINE-STRUCTURE;CATALYTIC REDUCTION;NITROGENMONOXIDE;NITRIC-OXIDE;PALLADIUM;OXYGEN;OXIDATION;ZEOLITES