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Light-duty vehicle PM and VOC speciated emissions at differing ambient temperatues with ethanol blend gasoline
Citation:
LONG, T. Light-duty vehicle PM and VOC speciated emissions at differing ambient temperatues with ethanol blend gasoline. Presented at 21st CRC Real World Emissions Workshop, San Diego, CA, March 20, 2011.
Impact/Purpose:
abstract
Description:
With the rise in the use of ethanol-blend gasoline in the U.S., interest is increasing in how these fuel blends affect PM and VOC emissions. EPA conducted a study characterizing emissions from two flex-fuel and one non-flex-fueled light-duty vehicles operated on a chassis dynamometer using the LA92 driving cycle. These vehicles were fueled with conventional gasoline (0% ethanol; EO), 10% ethanol gasoline (E10), and 85% ethanol gasoline (E85) for the flex-fuel vehicles. The chassis dynamometer was housed in an environmental control chamber, and the vehicles were operated at 20 and 75 degrees Fahrenheit for all vehicle and fuel combinations. Exhaust emissions were characterized for criteria pollutants (CO, NOx, PM2.5), VOC and carbonyl air toxics (e.g. benzene, toluene, xylenes, acetaldehyde, acrolein), and particulate components (e.g. mass, carbon content, PAHs). Results show the trends in vehicle emissions for these measured pollutants based on vehicle technology, fuel, and temperature combinations. This presentation describes the results of the PM and VOC pollutant measurements for the multiple testing parameters.