The effect of C(s) on the trapping of NOx onto Pt/Ba/Al2O3 catalysts

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Title: The effect of C(s) on the trapping of NOx onto Pt/Ba/Al2O3 catalysts
Authors: Sullivan, James A.
Dulgheru, Petrica
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Date: Aug-2010
Abstract: Pt/BaO/Al2O3 catalysts react with NO/O2 mixtures to form barium nitrites and nitrates. In the presence of small amounts of C(s) admixed with the catalyst the concentrations of NOx adsorbed is considerably reduced and the stability of the stored NOx is decreased. These results suggest that there are important implications for any attempts to combine NSR and particulate combustion systems within a single catalytic system. Furthermore, it is clear that there are significant concentrations of mobile NOx species present in the environs of the NOx trap prior to fixation on BaO, i.e. the transfer between NO2 formed on the Pt component of the trap and the “fixed” NOx in Ba(NO3)2 involves significant concentrations of gaseous or surface mobile NO2.
Type of material: Journal Article
Publisher: Elsevier
Journal: Applied Catalysis B: Environmental
Volume: 99
Issue: 1 - 2
Start page: 235
End page: 241
Copyright (published version): 2010 Elsevier B.V.
Keywords: NOx trapParticulate combustion4-Way catalysis
DOI: 10.1016/j.apcatb.2010.06.025
Language: en
Status of Item: Peer reviewed
Appears in Collections:Chemistry Research Collection

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