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Modelling the Hydrothermal Ageing of a Fe‐Zeolite Catalyst for Automotive NH 3 ‐SCR Applications
Author(s) -
Ruggeri Maria Pia,
Nova Isabella,
Tronconi Enrico,
Schmeißer Volker,
Weibel Michel
Publication year - 2018
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201700135
Subject(s) - zeolite , hydrothermal circulation , nox , catalysis , adsorption , chemical engineering , ageing , materials science , chemistry , organic chemistry , engineering , biology , genetics , combustion
The effects of duration and temperature of hydrothermal ageing treatments were investigated on a commercial Fe‐zeolite catalyst for NH 3 ‐SCR addressing NH 3 adsorption, NH 3 oxidation, and NH 3 reaction with NO x . Hydrothermal ageing affected primarily NH 3 oxidation and standard SCR activities, as well as NH 3 storage 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 NH 3 storage capacity.