Effects of Catalyst Formulation on Vehicle Emissions With Respect to Gasoline Fuel Sulfur Level 1999-01-3675
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.
Citation: 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. Download Citation
Author(s):
Gordon Bartley, Bruce Bykowski, Steve Welstand, David Lax
Affiliated:
Southwest Research Institute, Chevron Products Company, American Petroleum Institute
Pages: 10
Event:
International Fuels & Lubricants Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Combustion and Emission Formation in SI Engines-SP-1478
Related Topics:
Emissions control
Environmental regulations and standards
Catalysts
Catalytic converters
Emissions
Control systems
Gasoline
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