| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 52214 | Catalysis Communications | 2008 | 5 Pages |
Abstract
Mn/Ba/Al2O3, Pt/Ba/Al2O3 and their combined catalyst for NOx storage-reduction by propylene were investigated. The results showed that Mn/Ba/Al2O3 exhibited good catalytic activity for NO oxidation-storage under lean burn condition. When Pt/Ba/Al2O3 was mixed with Mn/Ba/Al2O3 in equal weight proportion, the NOx conversion between 250 °C and 500 °C under the dynamic lean-rich burn conditions increased, and the maximum NOx conversion increased from 82.0% to 90.8% at 400 °C. The combined catalyst showed higher catalytic activity and better stability in the presence of 25 ppm SO2 in comparison to Pt/Ba/Al2O3. XRD and XPS characterizations of Mn/Ba/Al2O3 indicated that MnO2 and Mn2O3 disperse on the surface, while BaMnO3 exits in bulk phase.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Jianhua Xiao, Xuehui Li, Sha Deng, Furong Wang, Lefu Wang,