Why Cu- and Fe-Zeolite SCR Catalysts Behave Differently At Low Temperatures

Event
SAE 2010 World Congress & Exhibition
Authors Abstract
Content
Cu- and Fe-zeolite SCR catalysts emerged in recent years as the primary candidates for meeting the increasingly stringent lean exhaust emission regulations, due to their outstanding activity and durability characteristics. It is commonly known that Cu-zeolite catalysts possess superior activity to Fe-zeolites, in particular at low temperatures and sub-optimal NO₂/NOx ratios. In this work, we elucidate some underlying mechanistic differences between these two classes of catalysts, first based on their NO oxidation abilities, and then based on the relative properties of the two types of exchanged metal sites. Finally, by using the ammonia coverage-dependent NOx performance, we illustrate that state-of-the-art Fe-zeolites can perform better under certain transient conditions than in steady-state.
Meta TagsDetails
DOI
https://doi.org/10.4271/2010-01-1182
Pages
9
Citation
Kamasamudram, K., Currier, N., Szailer, T., and Yezerets, A., "Why Cu- and Fe-Zeolite SCR Catalysts Behave Differently At Low Temperatures," SAE Int. J. Fuels Lubr. 3(1):664-672, 2010, https://doi.org/10.4271/2010-01-1182.
Additional Details
Publisher
Published
Apr 12, 2010
Product Code
2010-01-1182
Content Type
Journal Article
Language
English