Impacts of Advanced Combustion, Fuels and Aftertreatment Technologies on Diesel PM Emissions: a Ten-Year Retrospective
This page updated January 22, 2009
Chair’s Air Pollution Seminar
Wednesday, February 11, 2009
Impacts of Advanced
John M. E. Storey, Ph.D.
engines have undergone a profound transformation since the early 1990’s
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 1980’s. 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-1990’s and provide a vision of future diesel technologies with an emphasis on PM and MSAT emissions.
John M. E. Storey,
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.
more information on this seminar please contact: