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Effects of Catalyst Formulation on Vehicle Emissions With Respect to Gasoline Fuel Sulfur Level
Technical Paper
1999-01-3675
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Proposed emissions standards will require that emissions control systems function at extremely high efficiency. Recently, studies have shown that elevated gasoline fuel sulfur levels (GFSL) can impair catalytic converter efficiency. In this study, a variety of tri-metal catalysts were evaluated to determine if formulation changes could reduce emissions sensitivity to GFSL. Catalysts with elemental composition similar to an OEM, but with double the precious metal (PM) loading, were evaluated using 38 and 620 ppm GFSL. Doubling the PM loading significantly reduced catalyst sensitivity to sulfur. Doubling the rhodium loading, at the expense of the platinum loading, significantly improved NOx emission sulfur sensitivity.
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Bartley, G., Bykowski, B., Welstand, S., and Lax, D., "Effects of Catalyst Formulation on Vehicle Emissions With Respect to Gasoline Fuel Sulfur Level," SAE Technical Paper 1999-01-3675, 1999, https://doi.org/10.4271/1999-01-3675.Also In
References
- EPA TIER 2 Study No. EPA420-R-98-008 July 31 1998
- Proposed Amendments to California Exhaust and Evaporative Emissions Standards and Test Procedures for Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles (LEV II)
- Schleyer, C.H. et al. “Reversibility of Sulfur Effects on Emissions of California Low Emission Vehicles,” SAE paper 1999-01-1544
- “AMA/AIAM Study on the Effects of Fuel Sulfur on Low Emission Vehicle Criteria Pollutants,” http://www.aama.com/environment
- “Urban Dynamometer Driving Schedule for Light-Duty Vehicle and Light-Duty Trucks.”
- Kruse, D. Huls, T. “Development of the Federal Urban Driving Schedule,” SAE paper 730553
- Sims, G.S. Sandeep, J. “Catalyst Performance Study Using Taguchi Methods,” SAE paper 881589
- Ball, D.J. Mohammed, A.G. Schmidt, W.A. “Application of Accelerated Rapid Aging Test (RAT) Schedules with Poisons: The Effects of Oil Derived Poisons, Thermal Degradation and Catalyst Volume on FTP Emissions,” SAE paper 972846
- Theis, J.R. “Catalytic Converter Diagnosis Using the Catalyst Exotherm,” SAE paper 942058