Catalysis Letters

, Volume 119, Issue 3, pp 257–264

Effect of Ceria on the Storage and Regeneration Behavior of a Model Lean NOx Trap Catalyst


DOI: 10.1007/s10562-007-9226-2

Cite this article as:
Ji, Y., Toops, T.J. & Crocker, M. Catal Lett (2007) 119: 257. doi:10.1007/s10562-007-9226-2


In this study the effect of ceria addition on the performance of a model Ba-based lean NOx trap (LNT) catalyst was examined. The presence of ceria improved NOx storage capacity in the temperature range 200–400 °C under both continuous lean and lean-rich cycling conditions. Temperature-programmed experiments showed that NOx stored in the ceria-containing catalyst was thermally less stable and more reactive to reduction with both H2 and CO as reductants, albeit at the expense of additional reductant consumed by reduction of the ceria. These findings demonstrate that the incorporation of ceria in LNTs not only improves NOx storage efficiency but also positively impacts LNT regeneration behavior.


NOx Storage Reduction LNT Ceria 

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Center for Applied Energy ResearchUniversity of KentuckyLexingtonUSA
  2. 2.Fuels, Engines and Emissions Research CenterOak Ridge National LaboratoryKnoxvilleUSA

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