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EQUILIBRIUM-INDUCED DECOMPOSITION OF NITRATES ON A NOX STORAGE/REDUCTION CATALYST


EMSL Project ID
18425

Abstract

We propose to study the effects of CO2 and H2O, two key diesel exhaust components, on the nitrate stability of a NOX storage/reduction catalyst. A detailed understanding of the equilibrium between surface nitrates, carbonates and hydroxide species, associated with both the basic (typically Ba) component and the support material is needed in order to successfully model the kinetics and performance of these samples. The study will include combining IR characterization of the catalyst surface, product gas analysis and temperature-programmed reaction techniques. The study will be based on pulsed-injections of the reactants and monitoring the surface and reactivity changes of the catalyst samples. We are requesting two, one week periods to perform the research described. This work will be disseminated in the open literature and is not proprietary.

Project Details

Project type
Exploratory Research
Start Date
2006-04-10
End Date
2007-02-23
Status
Closed

Team

Principal Investigator

William Epling
Institution
University of Waterloo

Related Publications

Epling WS, CHF Peden, and J Szanyi. 2008. "Carbonate Formation and Stability on a Pt/BaO/γ-Al2O3 NOx Storage/Reduction Catalyst." Journal of Physical Chemistry C 112(29):10952-10959. doi:10.1021/jp712180q