NOx Storage-Reduction with CO over Combined Catalysts

Abstract:

The combined catalysts Mn/Ba/Al₂O₃-Pt/Ba/Al₂O₃ and Mn/Ba/Al₂O₃+Pt/Ba/Al₂O₃ for NO_x storage-reduction were investigated. Mn/Ba/Al₂O₃ indicated high activity of NO oxidation and NO_x storage in the oxidation-storage reaction and certain reduction activity in the storage-reduction reaction. The combination of Pt/Ba/Al₂O₃ with Mn/Ba/Al₂O₃ could enhance the activity of NO_x storage-reduction under dynamic lean-rich burn conditions. Compared to Pt/Ba/Al₂O₃ catalyst, although the Pt content decreased half over Mn/Ba/Al₂O₃-Pt/Ba/Al₂O₃ and Mn/Ba/Al₂O₃+Pt/Ba/Al₂O₃ , the NO_x conversion increased 9.4% and 6.3% at 350 °C. The pollutions such as NO_x and CO could be eliminated effectively over two combined catalysts with low Pt content under dynamic lean-rich burn conditions.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 2214-2219
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.2214
• Online since: August 2013
• Authors: Jian Hua Xiao*, Xue Hui Li, Le Fu Wang
• Keywords: Combined Catalyst, Mn/Ba/Al₂O₃, NO Oxidation-Storage, NOx Storage-Reduction, Pt/Ba/Al₂O₃

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