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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. 相似文献
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