Combined IR spectroscopy and kinetic modeling of NOx storage and NO oxidation on Fe-BEA SCR catalysts

- NOx storage and NO oxidation on Fe-BEA was studied through FTIR-spectroscopy.
- Nitrites were thermally stable at temperatures up to 100 °C.
- NO3 were formed on Al atoms, as well as on Fe sites.
- NO uptake on Fe-BEA was limited and NO oxidation was observed on Al and Fe sites.
- IR observations were modeled through a multi-site kinetic model.