The Effect of Federal Fuel Sulfur Regulations on In-Use Fleets: On-Road Heavy-Duty Source Apportionment
From 2002 to 2007 fuel sulfur content in the Minneapolis/St. Paul area decreased from about 325 ppm S to
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Veröffentlicht in: | Environmental science & technology 2009-07, Vol.43 (14), p.5358-5364 |
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creator | Johnson, Jason P Kittelson, David B Watts, Winthrop F |
description | From 2002 to 2007 fuel sulfur content in the Minneapolis/St. Paul area decreased from about 325 ppm S to |
doi_str_mv | 10.1021/es8037164 |
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We hypothesized that the reduction in fuel sulfur would result in a reduction of fuel specific heavy duty (HD) particle number emissions for the on-road diesel fleet. Fuel specific emissions were estimated by collecting on-road aerosol data, and exploiting the difference in the relative volumes of HD and light duty (LD) traffic on the roadway. Fuel-specific particle number emissions for HD vehicles were measured to be 9.1 ± 6.6 × 1015 and 3.2 ± 2.8 × 1015 particles/kg of fuel burned, in 2006 and 2007, respectively, a reduction of 65%. In an earlier study in 2002 particle number emissions for the in-use HD fleet were 4.2 ± 0.6 × 1015 particles/km compared to the current measurements of 2.8 ± 2.1 × 1015 and 9.9 ± 8.7 × 1014 particles/km in 2006 and 2007, respectively. 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Sci. Technol</addtitle><description>From 2002 to 2007 fuel sulfur content in the Minneapolis/St. Paul area decreased from about 325 ppm S to <15 ppm S as a result of EPA regulations. We hypothesized that the reduction in fuel sulfur would result in a reduction of fuel specific heavy duty (HD) particle number emissions for the on-road diesel fleet. Fuel specific emissions were estimated by collecting on-road aerosol data, and exploiting the difference in the relative volumes of HD and light duty (LD) traffic on the roadway. Fuel-specific particle number emissions for HD vehicles were measured to be 9.1 ± 6.6 × 1015 and 3.2 ± 2.8 × 1015 particles/kg of fuel burned, in 2006 and 2007, respectively, a reduction of 65%. In an earlier study in 2002 particle number emissions for the in-use HD fleet were 4.2 ± 0.6 × 1015 particles/km compared to the current measurements of 2.8 ± 2.1 × 1015 and 9.9 ± 8.7 × 1014 particles/km in 2006 and 2007, respectively. 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subjects | Air Pollutants - analysis Air Pollutants - standards Applied sciences Emission standards Emissions Environmental Measurements Methods Environmental Monitoring - methods Exact sciences and technology Fuels Minnesota Models, Theoretical Pollution Sulfur Sulfur - chemistry Sulfur - standards Sulfur content United States United States Environmental Protection Agency Vehicle Emissions |
title | The Effect of Federal Fuel Sulfur Regulations on In-Use Fleets: On-Road Heavy-Duty Source Apportionment |
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