Reduction of Exhaust Emission from a Stoichiometric Engine Using Non-Thermal Plasma Generated by a Corona Discharge Device 1999-01-3636
A corona discharge device (CDD) used in conjunction with automotive stoichiometric catalysts has been shown to be effective in reducing exhaust tailpipe emissions and catalytic converter light-off temperatures. The CDD used here is a low power, low cost corona discharge device mounted ahead of the catalytic converter in the exhaust stream. Creation of radicals and other oxidizing species in the exhaust by the non-thermal plasma is shown to significantly improve catalyst conversion efficiencies for HC, CO and NOx. Burner flow data shows improvement in steady-state conversion efficiencies as well as improved catalyst light-off performance. Engine-dynamometer and vehicle data on spark ignition engines using production type (stoichiometric) control also shows improved performance with aged catalysts, and various levels of fuel sulfur. The reversibility of sulfur poisoning was also observed. With the CDD, catalysts are shown to recover performance more fully and at lower temperatures after fuel sulfur levels are decreased.
Citation: Caren, R., Ekchian, J., Roth, G., Cowart, J. et al., "Reduction of Exhaust Emission from a Stoichiometric Engine Using Non-Thermal Plasma Generated by a Corona Discharge Device," SAE Technical Paper 1999-01-3636, 1999, https://doi.org/10.4271/1999-01-3636. Download Citation
Author(s):
R. P. Caren, J. A. Ekchian, G. J. Roth, J. S. Cowart, L. B. Noordzij
Affiliated:
Litex, Inc., Consultant, Arthur D. Little, Inc.
Pages: 9
Event:
International Fuels & Lubricants Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Non-Thermal Plasma for Exhaust Emission Control: Nox, Hc, and Particulates-SP-1483
Related Topics:
Spark ignition engines
Exhaust emissions
Catalytic converters
Catalysts
Nitrogen oxides
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