ARB Research Seminar
This page updated June 19, 2013
Impacts of Advanced Combustion, Fuels and Aftertreatment Technologies on Diesel PM Emissions: a Ten-Year Retrospective
John M.E. Storey, Ph.D., Distinguished Research Scientist, Oak Ridge National Laboratory, Tennessee
February 11, 2009
Cal EPA Headquarters, 1001 "I" Street, Sacramento, CA
Diesel engines have undergone a profound transformation since the early 1990s
as a result of engineering advancements and environmental
regulation. The on-road engine systems of 2010 will
demonstrate up to a 1000-fold decrease in both particulate matter (PM)
and oxides of nitrogen (NOx) emissions in comparison to their
uncontrolled brethren of the 1980s. Thermal efficiency, a
measure of the useful work extracted from the total energy content of
the fuel, has also increased in this time period due to improvements in
turbocharging, fuel injection and electronic controls. Dramatic reductions in both PM and mobile source air
toxic (MSAT) emissions have occurred with
advances in fuels, engines and emissions controls. Awareness
of particulate impacts on public health has increased the importance of
exhaust particle size and number concentration as
well. These trends will continue to
influence on local air quality as well as require rethinking of
emissions factors used in air quality modeling.
This presentation will trace the development of diesel engine emissions control technologies since the mid-1990s and provide a vision of future diesel technologies with an emphasis on PM and MSAT emissions.
John M. E. Storey, Ph.D., has
been at Oak Ridge National Laboratory (ORNL) since 1992 and currently
leads the emissions characterization efforts for ORNL’s Fuels, Engines,
and Emissions Research Center. He participates in both the
fuels and combustion programs in this capacity. In addition
Dr. Storey does extensive research on real-world mobile source
emissions. In both arenas his research emphasizes air toxics
and particulate characterization.
Dr. Storey currently serves on the Transportation and Air Quality Committee of the Transportation Research Board, and has co-chaired Department of Energy committees on Toxics and PM Emissions from Advanced Petroleum Based Fuels. Dr. Storey recently completed a project for EPA’s OTAQ on diesel PM retrofit devices. Dr. Storey has also teamed with the Texas Transportation Institute on three projects assessing the emissions of Mexican heavy-duty vehicles at border crossings points. Other areas of research interest include health effects of exhaust nanoparticles and the development of instrumentation for real-time exhaust composition measurement.