The effects of duration and temperature of hydrothermal ageing treatments were investigated on a commercial Fe-zeolite catalyst for NH3-SCR addressing NH3adsorption, NH3oxidation, and NH3reaction with NOx. Hydrothermal ageing affected primarily NH3oxidation and standard SCR activities, as well as NH3storage capacity. Deactivation was fast in the first few hours, eventually approaching asymptotic levels. There is potential to predict the effects of hydrothermal ageing on the SCR behavior of Fe-zeolite catalysts as a function of just one parameter, i.e., the NH3storage capacity.

Modelling the Hydrothermal Ageing of a Fe-Zeolite Catalyst for Automotive NH3-SCR Applications

Ruggeri, Maria Pia;Nova, Isabella;Tronconi, Enrico;
2018-01-01

Abstract

The effects of duration and temperature of hydrothermal ageing treatments were investigated on a commercial Fe-zeolite catalyst for NH3-SCR addressing NH3adsorption, NH3oxidation, and NH3reaction with NOx. Hydrothermal ageing affected primarily NH3oxidation and standard SCR activities, as well as NH3storage capacity. Deactivation was fast in the first few hours, eventually approaching asymptotic levels. There is potential to predict the effects of hydrothermal ageing on the SCR behavior of Fe-zeolite catalysts as a function of just one parameter, i.e., the NH3storage capacity.
2018
Catalyst deactivation; Fe-zeolite catalysts; Hydrothermal ageing; Selective catalytic reduction; Chemistry (all); Chemical Engineering (all); Industrial and Manufacturing Engineering
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1072013
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