This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Benefits and Challenges Faced by Aftermarket Catalyst Manufacturers in Implementing Advanced Coating Techniques in TWC (Gasoline Applications)
Technical Paper
2017-01-0921
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The automotive aftermarket industry is an extremely cost competitive market to say the least. Aftermarket manufacturers are sought by customers primarily for their ability to replace an OES (Original Equipment Supplier) for a fraction of the cost. This forces the manufacturers to yield on performance abilities to get a share in the market place. The TWC system in gasoline vehicles not only acts as an emissions reduction device but is an integral part of the overall vehicle performance itself, especially since the introduction of OBD (On-Board Diagnostics) II systems in 1995. An inefficient catalyst not only leads to excessive tailpipe emissions but also acts detrimental to vehicle fueling and hence overall performance. The aftermarket catalyst industry which is regulated by EPA (United States Environmental Protection Agency) and CARB (California Air Resource Board) for gasoline engines is subject to meeting a mandatory performance standard for the same reason. There are several advancements in catalyst technologies to gain performance but this may or may not apply to the aftermarket manufacturers.
This paper will discuss three established coating techniques in TWC (Three Way Catalyst) catalyst and their influence on PGM (Precious Group Metal) reduction, emissions performance, and cost reduction and production feasibility. The first method is referred to as slurry coating and possibly the easiest coating method, PGM+WC (Wash Coat) slurry where all precious metals and the supporting washcoat is mixed and applied as one slurry. The second method is referred to as layer coating where the Palladium is in the slurry solution with the washcoat and coated as the first layer on the substrate and then the Rhodium is layered on top as a metal impregnation. The third method is referred to as zone coating where the palladium is in the slurry with the washcoat and it is coated in the inlet of the substrate, while the Rhodium is in the slurry with the washcoat and it is coated in the outlet of the substrate.
Recommended Content
Authors
Citation
Sathiamoorthy, B., Graper, A., McIntosh, A., and Kaminski, W., "The Benefits and Challenges Faced by Aftermarket Catalyst Manufacturers in Implementing Advanced Coating Techniques in TWC (Gasoline Applications)," SAE Technical Paper 2017-01-0921, 2017, https://doi.org/10.4271/2017-01-0921.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 |
Also In
References
- Heck R. M. and Farrauto R. J. Automobile Exhaust Catalysts Applied Catalysis A: General 221 1-2 443 457 2001
- Mastsumoto S. Recent Advances in Automobile Exhaust Catalysts Catalysis Today 90 3-4 183 190 July 2004
- Gandhi H. S. , Graham G. W. and McCabe R. W. Automotive Exhaust Catalysis 216 1-2 433 442 June 2003
- Manufacturers of Emission Controls Association Aftermarket Convertor Technology for Gasoline Light-Duty Vehicles MECA Washington, D.C. 2009
- California Air Resource Board California Evaluation Procedures for New Aftermarket Catalytic Convertors October 2007 https://www.arb.ca.gov/regact/2007/amcat07/approvalamcat.pdf 2016
- DieselNet https://www.dieselnet.com/standards/us/ld_t2.php#bins December 2006 https://www.dieselnet.com/standards/us/ld_t2.php#bins 10 December 2016
- Hepburn , J. , Patel , K. , Meneghel , M. , Gandhi , H. et al. Development of Pd-only Three Way Catalyst Technology SAE Technical Paper 941058 1994 10.4271/941058
- Farrauto R. and Heck R. Catalytic convertors: state of the art and perspectives Catalysis Today 51 3-4 351 360 29 July 1999
- Somiya S. Handbook of Advanced Ceramics Second Edition: Materials, Applications, Processing and Properties Somiya S. Elsevier 2013 923 930
- Aristo Intelligent Catalyst Technology Aristogobal.com 14 January 2015 www.aristoglobal.com/tech.php 12 October 2016
- Christopher J. , Ahmed S. , Patel M. , Basu B. , Jain S. , Srivastava S. and Bhatnagar A. Elemental Analysis of FCC Catalysts by XRF & ICP Techniques - A Statistical Comparison Recent Advances in Basic and Applied Aspects of Indsutrial Catalysis 1998
- Dieselnet Catalytic Coating and Materials 2005
- Aoki , Y. , Sakagami , S. , Kawai , M. , Takahashi , N. et al. Development of Advanced Zone-Coated Three-Way Catalysts SAE Technical Paper 2011-01-0296 2011 10.4271/2011-01-0296
- Shamim , T. The Effect of Space Velocity on the Dynamic Characteristics of an Automotive Catalytic Converter SAE Technical Paper 2005-01-2160 2005 10.4271/2005-01-2160
- Shamim T. , Shen H. , Sengupta S. , Son S. and Adamczzyk A. A. A Comprehensive Model to Predict Three-Way Catalytic Convertor Performance J. Eng. as Turbines Power 124 2 421 428 26 March 2002
- Environmental Protection Agency Greenhouse Gas Emissions Model (GEM) User Guide 2011