Evaluation of Supplier Catalyst Formulations for the Selective Catalytic Reduction of NOx With Ammonia
2005-01-3881
10/24/2005
- Event
- Content
- The selective catalytic reduction of NO using urea (urea-SCR) is one of the promising technologies for removing NOx from diesel engine exhaust. The engine-out NOx is reduced by ammonia (NH3) derived from urea over a catalyst to environmentally benign N2. In this paper, we investigate the effect of various reactor operating conditions on the NOx reduction performance of three different catalyst formulations (e.g., Cu-zeolite, Fe-zeolite, Vanadium-based) to obtain useful guidance in the design and operation of urea-SCR lean NOx emission control systems. We examine the effects of NO:NO2 ratio on the steady-state NOx reduction activity at typical diesel engine exhaust temperatures (150-550°C). Transient measurements were also performed to determine the impact of NH3:NOx ratio and NH3 storage on catalyst performance. The impacts of hydrocarbon poisoning and sulfur poisoning/regeneration were also examined.
- Pages
- 11
- Citation
- Schmieg, S., and Lee, J., "Evaluation of Supplier Catalyst Formulations for the Selective Catalytic Reduction of NOx With Ammonia," SAE Technical Paper 2005-01-3881, 2005, https://doi.org/10.4271/2005-01-3881.