Identification of nitrites/HONO as primary products of NO oxidation over Fe-ZSM-5 and their role in the Standard SCR mechanism: A chemical trapping study

- Standard SCR/NO oxidation mechanisms investigated by Chemical Trapping techniques.
- NO + O2 fed to a mechanical mixture of Fe-ZSM5 catalyst and BaO/Al2O3 trap.
- Nitrite intermediates are formed on Fe sites and stored on BaO via gas-phase HONO.
- Identification of nitrites on BaO/Al2O3 by ex situ IR analysis.
- Confirmation of nitrites storage by TPD and TPSR runs with NH3.