Chemical deactivation of Fe-BEA as NH3-SCR catalyst-Effect of phosphorous

- Phosphorous exposure of Fe-BEA as NH3-SCR catalyst.
- Fe-BEA tolerance against chemical deactivation.
- Short time of phosphorous exposure forms phosphorus pentoxides (P2O5).
- Long time of phosphorous exposure form metaphosphates (PO3−).
- Metaphosphates replace the hydroxyl groups on the active iron species in Fe-BEA.