Chemical Liquid Deposition (CLD)-Modified Fe-ZSM-5 for Enhanced Activity and Resistance to C₃H₆ Poisoning in Selective Catalytic Reduction with NH₃ (NH₃-SCR)

Hydrocarbon fouling can deactivate the catalyst in the selective catalytic reduction (SCR) with NH₃ of NO. We use a simple chemical liquid deposition technique to dope a shell layer of SiO₂. The results show that it acts as a protective layer against C₃H₆ while providing abundant Lewis acid sites. which compensate for the relatively less Fe-active sites and therefore contribute to higher overall SCR activities and better resistance to C₃H₆ poisoning. Moreover, the C₃H₆ has been found to have promotional effects on SCR at a lower temperature (150 °C), because of the additional SCR reaction with C₃H₆.