Enhanced NOx Conversion with Decane Over Ag/Al2O3 and Metal Supported ZSM-5 Composite SCR Catalysts

A combination of Ag/Al2O3 and a partial oxidation catalyst M/ZSM-5, M being different metal cations, were evaluated for selective catalytic reduction of NO with decane. Physical mixture of Ag/Al2O3 and M/ZSM-5 catalysts showed significant increase in NOx conversion compared to single component Ag/Al2O3 catalyst. M/ZSM-5 as a second catalyst component was found to generate more reactive hydrocarbons, such as unsaturated small chain hydrocarbons and oxygenates in situ, and enhance the NOx conversion over Ag/Al2O3 HC-SCR catalyst.