You are here:
PARTICLE SPECIATION AND EMISSION PROFILES OF SMALL 2-STROKE ENGINES
Citation:
Volckens, J., J N. Braddock, R. Snow, C. Loomis, AND W. Crew. PARTICLE SPECIATION AND EMISSION PROFILES OF SMALL 2-STROKE ENGINES. Presented at American Association for Aerosol Research, Anaheim, CA, October 21, 2003.
Impact/Purpose:
The main research question guiding this task is "how do mobile source emissions impact public health and the environment." The main objectives of this task include:
(1) Identify spatial and temporal variability in pollutant concentrations near major mobile source emission locations such as urban roadways and non-road activities.
(2) Characterize real-world emissions from on- and non-road mobile sources for use in identifying hazardous components and developing and improving mobile source emissions and human exposure models.
(3) Develop mobile source emission profiles and markers for use in human exposure and air quality receptor models.
(4) Determine the impact of emerging technologies (fuels and engine systems) on emissions and exposures to toxic pollutants.
(5) Develop and improve analytical methods that measure emissions from mobile sources.
Description:
The Human Exposure and Atmospheric Sciences Division (HEASD) conducts studies designed to acquire information from emission sources for use in source apportionment studies. The objective of this work is to characterize a complete, speciated emission profile (PM and air toxics) from new and in-use two-stroke engines. Little is known about the organic and elemental composition of the exhaust from these engines, even though their emission rates are high. A variety of engines will be tested on a low-torque dynamometer in conjunction with a constant-volume dilution/sampling system. Fuel mixtures will consist of a blend of two fuels (a baseline gasoline and a reformulated fuel containing ethanol) and two oils (synthetic or petroleum). Particulate matter samples will be speciated for elemental and organic carbon content, individual polar and non-polar compounds (including semivolatile species), metals, and water soluble ions. Gas-phase samples will be speciated for both regulated (NAAQS) and non-regulated compounds. Results from this work will provide emission profiles for future source apportionment studies and regulated, mobile source emission models, and will demonstrate the effect of fuel composition on emissions.
This is an abstract of a proposed presentation and does not necessarily reflect the United States Environmental Protection Agency (EPA) policy. The actual presentation has not been peer reviewed by EPA. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.