Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title The effects of ultra-low sulfur gasoline on emissions from tier 2 vehicles in the in-use fleet : final report /
CORP Author Environmental Protection Agency, Washington, DC. Office of Transportation and Air Quality.
Publisher U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Assessment and Standards Division,
Year Published 2014
Report Number EPA-420-R-14-002
Stock Number PB2014-108187
OCLC Number 892640943
Subjects Sulfur. ; Petroleum--Sulfur content. ; Automobiles--Motors--Exhaust gas.
Additional Subjects Sulfur ; Gasoline ; Exhaust emissions ; Air pollution control ; Vehicles ; Catalysts ; Diesel fuels ; Environmental effects ; Fuel consumption ; Implementation ; Nitrogen oxides ; Pollutants
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA 420-R-14-002 PDF file on file NVFEL Library/Ann Arbor, MI 10/14/2014
NTIS  PB2014-108187 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 02/25/2015
Collation 1 online resource (64 pages) : color illustrations
Fuel sulfur content has long been understood to affect the performance of emission aftertreatment catalysts in light duty vehicles, where the sulfur and its oxides occupy active precious metal sites and oxygen storage materials, reducing the catalysts efficiency in destroying pollutants. Numerous studies have shown the direct impact of fuel sulfur levels above 30 ppm on emissions, data that formed the basis of the sulfur controls in EPA's Tier 2 rulemaking for light duty vehicle emissions, published in 2000. Following the successful implementation of the Tier 2 sulfur standards, new research has focused on the emission reduction potential of lowering sulfur levels below 30 ppm, particularly on Tier 2 and newer technology vehicles, under the hypothesis that increased reliance on the catalytic convertor will result in a higher sensitivity to fuel sulfur content. A 2005 study conducted jointly by EPA and several automakers found large decreases in NOx and HC emissions from vehicles meeting Tier 2 Bin 5 emission levels when operating on 6 ppm versus 32 ppm sulfur test fuel. In order to gain further understanding of how these emission reductions would translate into the in-use fleet, EPA conducted the study described here to assess the state of sulfur loading (poisoning) in typical in-use vehicles, as well as the effect of fuel sulfur level on these vehicles during subsequent mileage accumulation.
Title from PDF title page (viewed on October 9, 2014). "March 2014." "EPA-420-R-14-002." Includes appendices A-F. Includes bibliographical references (pages 62-64).
Contents Notes
Final report -- appendix A. Details of on-road mileage accumulation route -- appendix B. Emission concentration plots -- appendix C. Additional information on emission measurements -- appendix D. Discussion of univariate and multivariate analysis of variance -- appendix E. Plots of all pollutants and bags -- appendix F. Sensitivity analysis of influential vehicles.