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.File in questo prodotto:
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