Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9609893 | Applied Catalysis B: Environmental | 2005 | 10 Pages |
Abstract
When 5% CO2 was included in a feed stream with 300Â ppm NO and 12% O2, the amount of K-based nitrate storage decreased by 45% after 1Â h on stream due to the competition of adsorbed free nitrates with carboxylates for adsorption sites. When 5% H2O was included in a feed stream with 300Â ppm NO and 12% O2, the amount of K-based nitrate storage decreased by only 16% after 1Â h, but the Al2O3-based nitrates decreased by 92%. Interestingly, with both 5% CO2 and 5% H2O in the feed, the total storage only decreased by 11%, as the hydroxyl groups generated on Al2O3 destabilized the K-CO2 bond; specifically, H2O mitigates the NOx storage capacity losses associated with carboxylate competition.
Related Topics
Physical Sciences and Engineering
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Authors
Todd J. Toops, D. Barton Smith, William S. Epling, Jim E. Parks, William P. Partridge,