NOx (NO+NO2) emissions from diesel vehicles are reduced by selective catalytic reduction with NH3 (NH3-SCR) over V2O5- or metal-zeolite-based catalysts. Cu-CHA zeolites are particularly relevant due to their superior low-temperature activity . However, the inevitable presence of SO2 in diesel exhaust causes deactivation of Cu-CHA catalysts [1-3]. As the required lifetime of an SCR catalyst is ca. 10000 h, it is important to know how the activity of the catalyst develops with long-term SO2 exposure, and if catalyst regeneration is an option. It has been shown that the deactivation by SO2 is partially reversible . In this contribution, we focus on the SO2 uptake by the Cu-CHA catalyst, and how the reversible and irreversible deactivation are related to the amount of sulfur in the catalyst.
|Number of pages||2|
|Publication status||Published - 2018|
|Event||The 10th International Conference on Environmental Catalysis, The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment - Tianjin, China|
Duration: 21 Sep 2018 → 26 Sep 2018
|Conference||The 10th International Conference on Environmental Catalysis, The 3rd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment|
|Period||21/09/2018 → 26/09/2018|
- SO2 poisoning