The effect of fuel sulfur level on the HC, CO and NOX conversion efficiencies of PD/RH, PT/RH, PD-only and tri-metal catalysts

Journal Article · Sun Dec 31 04:00:00 EST 1995 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:460147

DiCircco, D M; Adamczyk, A A; Patel, K S

Due to additional requirements imposed by the 1990 amendments to the Clean Air Act, automotive emissions systems must perform at high efficiencies for 100,000 miles. However, fuels containing sulfur, can reduce the efficiency of many modern catalyst formulations. Additionally, the Northeast Ozone Transport Commission (OTC) has petitioned the US Environmental Protection Agency (EPA) to require region-wide adaptation of the California Low-Emission Vehicle standards without the application of California`s reformulated gasoline program which is necessary to keep the level of fuel sulfur low. As will be seen, this will result in reduced catalyst activity in the OTC, since typical gasolines contain sulfur levels which vary considerably. Gasolines containing 50ppmS and 500ppmS only represent the 10th and 75th percentile of US commercial summer fuels. As will be shown, these high levels of fuel sulfur will lower the performance of high activity catalyst formulations and may make compliance with LEV/ULEV emissions levels extremely difficult if not impossible without the adaptation of low-sulfur fuels.

• OSTI ID: 460147
• Report Number(s): CONF-950801--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 4 Vol. 40; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
AIR POLLUTION CONTROL
CARBON MONOXIDE
CATALYTIC EFFECTS
EXHAUST GASES
GASOLINE
HYDROCARBONS
NITROGEN OXIDES
PALLADIUM
PLATINUM
RHODIUM
VEHICLES