This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of SO 2 and SO 3 Poisoning on Cu/Zeolite SCR Catalysts
Technical Paper
2009-01-0898
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Copper/zeolite catalysts are the leading urea SCR catalysts for NOx emission treatment in diesel applications. Sulfur poisoning directly impacts the overall SCR performance and is still a durability issue for Cu/zeolite SCR catalysts. Most studies on sulfur poisoning of Cu/zeolite SCR catalysts have been based on SO2 as the poisoning agent. It is important to investigate the relative poisoning effects of SO3, especially for systems with DOCs in front of Cu/zeolite SCR catalysts.
It was observed that SCR activity was significantly reduced for samples poisoned by SO3 vs. those poisoned by SO2. The sulfur was released mainly as SO2 for both samples poisoned by SO2 and SO3. The temperatures and the magnitudes of released SO2 peaks however, were very different between the samples poisoned by SO2 vs. SO3. The results indicate that sulfur poisoning by SO2 and SO3 are not equivalent, with different poisoning mechanisms and impacts. This study raises an important sulfur poisoning concern for the systems with DOCs in front of Cu/zeolite SCR catalysts in diesel engine applications.
Recommended Content
Authors
Topic
Citation
Cheng, Y., Montreuil, C., Cavataio, G., and Lambert, C., "The Effects of SO2 and SO3 Poisoning on Cu/Zeolite SCR Catalysts," SAE Technical Paper 2009-01-0898, 2009, https://doi.org/10.4271/2009-01-0898.Also In
References
- Lambert, C. Vanderslice, J. Hammerle R. Belaire, R. “Application of Urea SCR to Light-Duty Diesel Vehicles” SAE 2001-01-3623
- Lambert, C. Hammerle, R. McGill, R Khair M. Sharp, C. “Technical Advantages of Urea SCR for Light-Duty and Heavy-Duty Diesel Vehicle Applications” SAE 2004-01-1292
- Schmieg, S.J. Lee, J-H. “Evaluation of Supplier Catalyst Formulations for the Selective Catalytic Reduction of NOx with Ammonia,” SAE 2005-01-3881
- Cavataio, G. Girard, J. Patterson, J. Montreuil, C. Cheng Y. Lambert, C. “Laboratory Testing of Urea-SCR Formulations to Meet Tier 2 Bin 5 Emissions” SAE 2007-01-1575
- Cheng, Y. Montreuil, C. Cavataio, G. Lambert, C. “Sulfur Tolerance and DeSOx Studies on Diesel SCR Catalysts” SAE 2008-01-1023
- Ramachandran B. et al “Testing zeolite SCR catalysts under protocol conditions for NOx abatement from stationary emission sources” Catalysis Today 55 2000 281
- Shibata, M. Nagata, H. Takeshima, S. Hoshino, K. “ A Study of Engine Oil Composition Effects on Zeolite-type SCR Catalyst Durability” SAE 2007-01-1924
- Nam, I.S. Choo, S.T. Kim, D.J.K.Y.G. “A pilot plant study for selective catalytic reduction of NO by NH 3 over mordenite-type zeolite catalysts” Catalysis. Today 38 1997 181
- Palomares, A. Prato, J. Corma, A. Catalysis Today 75 2002 367 371