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NOx storage capacity, SO2 resistance and regeneration of Pt/(Ba)/CeZr model catalysts for NOx-trap system
| Content Provider | Semantic Scholar |
|---|---|
| Author | Corbos, E. C. Elbouazzaoui, Sanaâ Courtois, Xavier Bion, Nicolas Marécot, Patrice Duprez, Daniel |
| Copyright Year | 2007 |
| Abstract | NOx storage capacity, sulphur resistance and regeneration of 1wt%Pt/Ce0.7Zr0.3O2 (Pt/CeZr) and 1wt%Pt/10wt%BaO/Ce0.7Zr0.3O2 (Pt/Ba/CeZr) catalysts were studied and compared to a 1wt%Pt/10wt%BaO/Al2O3 (Pt/Ba/Al) model catalyst submitted to the same treatments. Pt/Ba/CeZr presents the best NOx storage capacity at 400 °C in accordance with basicity measurements by CO2 TPD and Pt/CeZr shows the better performance at 200 °C mainly due to a low sensitivity to CO2 at this temperature. For all samples, sulphating induces a detrimental effect on NOx storage capacity but regeneration at 550 °C under rich conditions generally leads to the total recovery of catalytic performance. However, the nearly complete sulphur elimination is only observed on Pt/CeZr. Moreover, an oxidizing treatment at 800 °C leads to partial sulphates elimination on the Pt/CeZr catalyst whereas a stabilization of sulphates on Ba containing species is observed. |
| Starting Page | 9 |
| Ending Page | 13 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11244-007-0142-x |
| Volume Number | 42-43 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s11244-007-0142-x |
| Alternate Webpage(s) | https://doi.org/10.1007/s11244-007-0142-x |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
