Comparison of Plasma-Catalyst and Lean NOx Catalyst for Diesel NOx Reduction 2000-01-2895
Projected NOx and fuel costs are compared for a plasma-catalyst system and an active lean NOx catalyst system. Comparisons are based on modeling of FTP cycle performance. The model uses steady state laboratory device characteristics, combined with measured vehicle exhaust data to predict NOx conversion efficiency and fuel economy penalties.
The plasma system uses a proprietary catalyst downstream of a plasma discharge. The active lean NOx catalyst uses a catalyst along with addition of hydrocarbons to the exhaust.
For the plasma catalyst system, NOx conversion is available over a wide temperature range. Increased electrical power improves conversion but degrades vehicle fuel economy; 10 J/L energy deposition costs roughly 3% fuel economy. Improved efficiency is also available with larger catalyst size or increased exhaust hydrocarbon content.
For the active lean NOx system, NOx conversion is available only in a narrow temperature range. Exhaust hydrocarbon levels must also be increased for good NOx conversion.
The plasma catalyst system is projected to have better NOx efficiency, at the expense of a larger fuel economy penalty than the active lean NOx catalyst.
Citation: Hoard, J., Laing, P., Balmer, M., and Tonkyn, R., "Comparison of Plasma-Catalyst and Lean NOx Catalyst for Diesel NOx Reduction," SAE Technical Paper 2000-01-2895, 2000, https://doi.org/10.4271/2000-01-2895. Download Citation
Author(s):
John Hoard, Paul Laing, M. Lou Balmer, Russ Tonkyn
Affiliated:
Ford Research Laboratory, Pacific Northwest National Laboratory
Pages: 10
Event:
International Fuels & Lubricants Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Non-Thermal Plasma-SP-1566, SAE 2000 Transactions Journal of Fuels and Lubricants-V109-4
Related Topics:
Exhaust emissions
Nitrogen oxides
Fuel economy
Electric power
Hydrocarbons
Catalysts
Energy conservation
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