This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fe-Zeolite SCR Model Development, Validation and Application
Technical Paper
2011-01-1304
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Selective Catalytic Reduction (SCR) technology has been widely studied for removal of NOX from the exhaust of diesel engines. To design and optimize diesel engine aftertreatment systems including an SCR catalyst component, a reliable SCR model is a very useful tool, to aid in system integration and control algorithm testing. In this paper, the development of a one-dimensional numerical model for a Fe-Zeolite-based SCR catalyst (hydrothermally aged for 100 hours at 650°C in 10% H₂O in air) is presented, followed by its validation and application. The resulting model is capable of predicting NOX reduction efficiency under various operating conditions as a function of gas hourly space velocity (SV), temperature, NO₂/NOX ratio and NH₃ to NOX (ANR) ratios; NH₃ slip and N₂O formation are also correctly predicted by the model. Extensive validation of the model has been carried out against engine test data for both steady state light-off and the heavy-duty FTP transient cycle (HD-FTP). Good agreement between model prediction and the engine test results was achieved. Finally, the model is used to optimize the instantaneous ANR ratio before the SCR catalyst over the HD-FTP, by minimizing SCR outlet NOX and NH₃ emissions. Results show very good potential for improving the urea/NH₃ dosing strategy for Fe-based SCR catalyst applications.
Recommended Content
Authors
Citation
Markatou, P., Dai, J., Johansson, A., Klink, W. et al., "Fe-Zeolite SCR Model Development, Validation and Application," SAE Technical Paper 2011-01-1304, 2011, https://doi.org/10.4271/2011-01-1304.Also In
References
- Bosch, H. Janssen, F. “Catalytic reduction of nitrogen oxides: A review on the fundamentals and technology,” Catal. Today 2 4 369 532 1988
- Busca, G. Lietti, L. Ramis, G. Berti, F. “Chemical and mechanistic aspects of the selective catalytic reduction of NO X by ammonia over oxide catalysts: A review,” Appl. Catal B: Environ. 18 1-2 1 36 1998 10.1016/S0926-3373(98)00040-X
- Forzatti, P. “Present status and perspectives in de-NO X SCR catalysis,” Appl. Catal. A: General 222 1-2 221 236 2001 10.1016/S0926-860X(01)00832-8
- Chatterjee, D. Burkhardt, T. Weibel, M. Tronconi, E. et al. “Numerical Simulation of NO/NO 2 /NH 3 Reactions on SCR-Catalytic Converters: Model Development and Applications,” SAE Technical Paper 2006-01-0468 2006 10.4271/2006-01-0468
- Tronconi, E. Nova, I. Ciardelli, C. Chatterjee, D. Bandl-Konrad, B. Burkhardt, T. “Modelling of an SCR catalytic converter for diesel exhaust after treatment: Dynamic effects at low temperature,” Catal. Today 105 3-4 529 536 2005 10.1016/j.cattod.2005.06.043
- Chatterjee, D. Burkhardt, T. Weibel, M. Nova, I. et al. “Numerical Simulation of Zeolite- and V-Based SCR Catalytic Converters,” SAE Technical Paper 2007-01-1136 2007 10.4271/2007-01-1136
- York, A.P.E. Watling, T.C. Cox, J.P. Jones, I.Z. et al. “Modeling an Ammonia SCR DeNO x Catalyst: Model Development and Validation,” SAE Technical Paper 2004-01-0155 2004 10.4271/2004-01-0155
- Lietti, L. Nova, I. Camurri, S. Tronconi, E. Forzatti, P. “Dynamics of the SCR-DeNO X Reaction by the Transient-Response Method,” AIChE J. 43 10 2559 2570 1997 10.1002/aic.690431017
- Güthenke, A. Chatterjee, D. Weibel, M. Krutzsch, B. Kočí, Marek M. Nova, I. Tronconi, E. “Current Status of Modeling Lean Exhaust Gas Aftertreatment Catalysts,” Adv. Chem. Eng. 33 103 211 2007 10.1016/S0065-2377(07)33003-2
- Koebel, M. Elsener, M. “Selective catalytic reduction of NO over commercial DeNO X -catalysts: experimental determination of kinetics and thermodynamic parameters,” Chem. Eng. Sci. 53 4 657 669 1998 10.1016/S0009-2509(97)00342-4
- Nova, I. Lietti, L. Tronconi, E. Forzatti, P. “Dynamics of SCR reaction over a TiO 2 -supported vanadia-tungsta commercial catalyst,” Catal. Today 60 1-2 73 82 2000 10.1016/S0920-5861(00)00319-9
- Dumesic, J. A. Topsøe, N. Y. Topsøe, H. Chen, Y. Slabiak, T. “Kinetics of Selective Catalytic Reduction of Nitric Oxide by Ammonia over Vanadia/Titania,” J. Catal. 163 2 409 417 1996 10.1006/jcat.1996.0342
- Ciardelli, C. Nova, I. Tronconi, E. Chatterjee, D. Burkhardt, T. Weibel, M. “NH 3 SCR of NO X for diesel exhausts aftertreatment: role of NO 2 in catalytic mechanism, unsteady kinetics and monolith converter modelling,” Chem. Eng. Sci. 62 18-20 5001 5006 2007 10.1016/j.ces.2006.11.031
- Nova, I Ciardelli, C. Tronconi, E. Chatterjee, D. Brandl-Konrad, B. “NH 3 -SCR of NO over a V-based Catalyst: Low-T Redox Kinetics with NH 3 Inhibition,” AIChE J. 52 9 3222 3233 2006 10.1002/aic.10939
- Schuler, A. Votsmeier, M. Kiwic, P. Gieshoff, J. Hautpmann, W. Drochner, A. Vogel, H. “NH 3 -SCR on Fe zeolite catalysts - From model setup to NH 3 dosing,” Chem. Eng. J. 154 1-3 333 340 2009 10.1016/j.cej.2009.02.037
- Olsson, L. Sjövall, H. Blint, R.J. “A kinetic model for ammonia selective catalytic reduction over Cu-ZSM-5,” Appl. Catal B: Environ. 81 3-4 203 217 2008 10.1016/j.apcata.2008.02.013
- Sjövall, H. Blint, R.J. Olsson, L. “Detailed kinetic modelling of NH 3 SCR over Cu-ZSM-5,” Appl. Catal. B: Environ. 92 1-2 138 153 2009 10.1016/j.apcatb.2009.07.020
- Watling, T.C. Ţuţuianu, M. Desai, M.R. Dai, J. et al. “Development and Validation of a Cu-Zeolite SCR Catalyst Model,” SAE Technical Paper 2011-01-1299 2011 10.4271/2011-01-1299
- Atkins, P.W. “Physical Chemistry,” Oxford University Press Oxford 0-19-855186-X 782 1988
- Miyamoto, A. Inomata, M. Yamazaki, Y. Murakami, Y. “Mechanism of the reaction between NO and NH 3 on V 2 O 5 in the presence of oxygen,” J. Catal. 57 3 526 527 1979 10.1016/0021-9517(79)90021-6
- Coq, B. Mauzezin, M. Delahay, G. Butet, J.-B. Kieger, S. “The simultaneous catalytic reduction of NO and N 2 O by NH 3 using an Fe-zeolite-beta catalyst,” Appl. Catal. B: Environ. 27 3 193 198 2000 10.1016/S0926-3373(00)00148-X
- Devadas, M. Kröcher, O. Elsener, M. Wokaun, A. Sögar, N. Pfeifer, M. Demel, Y. Mussmann, L. “Influence of NO 2 on the catalytic reduction of NO with ammonia over Fe-ZSM5,” Appl. Catal. B: Environ. 67 3-4 187 196 2006 10.1016/j.apcatb.2006.04.015
- Ahmadinejad, M. Desai, M.R. Watling, T.C. York, A.P.E. “Simulation of Automotive Emission Control Systems,” Adv. Chem. Eng. 33 47 101 2007 10.1016/S0065-2377(07)33002-0
- Colombo, M. Nova, I. Tronconi, E. “A comparative study of the NH 3 -SCR reactions over a Cu-zeolite and a Fe-zeolite catalyst,” Catal. Today 151 3-4 223 230 2010 10.1016/j.cattod.2010.01.010
- Kamasamudram, K. Currier, N. Szailer, T. Yezerets, A. “Why Cu- and Fe-Zeolite SCR Catalysts Behave Differently At Low Temperatures,” SAE Int. J. Fuels Lubr. 3 1 664 672 2010 10.4271/2010-01-1182
- Kamasamudram, K. Currier, N.W. Chen, X. Yezerets, A. “Overview of the practically important behaviours of zeolite-based urea-SCR catalysts, using compact experimental protocol,” Catal Today 151 3-4 212 222 2010 10.1016/j.cattod.2010.03.055