Abstract
The effect of various parameters on the NO x conversion over NO x storage and reduction catalysts supported on alumina was investigated. The Pt/BaO/Al2O3 catalyst exhibited a higher NO x reduction activity than the Pt/Al2O3 catalyst under the static and cycling conditions. The activity of Pt/BaO/Al2O3 catalyst was improved in the cycled feedstream. The Pt/SrO/Al2O3 was found to have as high activity as Pt/BaO/Al2O3 for NO x reduction. In order to achieve effective reduction of NO x , NO x storage in the form of Me(NO3)2 (Me = Ba or Sr) is more favorable than other nitrates and the rich condition should be chosen in such a way that the sorption capacity can be fully regenerated at a fast rate and the inhibition effect by strongly adsorbed molecules derived from C3H6 and CO can be minimized.
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Han, PH., Lee, YK., Han, SM. et al. NOx Storage and Reduction Catalysts for Automotive Lean-Burn Engines: Effect of Parameters and Storage Materials on NOx Conversion. Topics in Catalysis 16, 165–170 (2001). https://doi.org/10.1023/A:1016659620699
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DOI: https://doi.org/10.1023/A:1016659620699