Oxidation and selective reduction of NO over Fe-ZSM-5 - How related are these reactions?

- Fe-ZSM-5 is strongly activated for NO oxidation by previous contact with SCR feed.
- Rates of NO oxidation to NO2 and of standard SCR are uncorrelated.
- NO2 formation is not a mechanistic step of standard SCR.
- Under conditions of standard SCR, NO oxidation is inhibited by NH3.