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Minimizing low temperature emissions through advances in metal oxide cataly...

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Rothchild Catering and Conference Center

8807 Kingston Pike

Knoxville, TN 37923

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A Joint Meeting of the American Institute of Chemical Engineers (AIChE) - Knoxville-Oak Ridge Section and the American Chemical Society (ACS)

Abstract:

Removing the harmful pollutants in automotive exhaust has been an intense focus of the automotive industry over the last several decades. Current state-of-the-art catalysts achieve 90% conversion of pollutants between 200 °C and 350 °C and consequently, more than 50% of the emissions occur in the first 2-3 minutes under “cold-start” or idling conditions. While such performance enables meeting current emission standards, as emissions regulations become more stringent meeting the emission regulations will require increased activity during this warm-up period. To further complicate matters, the increased Corporate Average Fuel Economy (CAFE) standards that will be implemented over the next decade in the United States will result in the introduction of more fuel-efficient engines. This will result in lower exhaust temperatures, which further necessitates the need for increased emissions control activity at low temperatures. These low temperature issues are expected to affect a wide range of powertrain options to meet the fuel economy standards including diesel vehicles, gasoline-powered vehicles, and hybrid electric vehicles.

This presentation will outline ongoing research to minimize criteria emissions through the optimization of metal oxides for catalysis, catalytic supports, and as trap materials. The first area that will be discussed is the study of improvements of conventional PGM-based oxidation catalysts with a focus on how modifying the metal oxide support can lead to improved activity. The second approach discussed will be the investigation of novel metal-oxides that are not currently being used in emissions control catalysts, with an emphasis on non-PGM materials. The third system discussed will highlight trap materials and what temperatures a family of materials is active for hydrocarbons and NOx. Finally, an example of how combining the best materials from these approaches can result in a potential solution in these challenging emission control environments.

Bio:

Todd J. Toops

Distinguished R&D Scientist

Applied Catalysis and Emissions Research Group

National Transportation Research Center

Oak Ridge National Laboratory

Ph.D., Chemical Engineering, Pennsylvania State University, 2001

B.S., Chemical Engineering, University of New Mexico, 1996

Dr. Todd J. Toops joined the National Transportation Research Center at Oak Ridge National Laboratory (ORNL) in 2001. His current research covers a wide range of clean energy topics including emissions control, biofuel, neutron radiography, and fuel cells. His areas of expertise include heterogeneous catalysis with an emphasis on kinetic measurements, mechanistic modeling, deactivation, and materials characterization. He chaired the 8th International Conference on Environmental Catalysis and is an active member of the North American Catalysis Society, the American Institute of Chemical Engineers, and the Society of Automotive Engineers. He has a strong publication record (90+), is on the editorial board of the Emissions Science and Technology journal.

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Rothchild Catering and Conference Center

8807 Kingston Pike

Knoxville, TN 37923

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Refunds up to 1 day before event

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