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Advanced Catalyst Studies of Diesel NOx Reduction for On-Highway Trucks
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1995 by SAE International in United States
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To date, several non-SCR catalysts and catalytic systems have been suggested for NOX reduction under oxygen rich (lean) conditions, such as those which exist in diesel engine exhaust gas. However, the performance of such catalysts and catalyst systems is not clear when used on actual diesel engines. This paper reports on experimental results obtained when lean NOx catalysts are applied to diesel engine exhaust. Particularly, the catalysts' NOx performance is examined when secondary hydrocarbons are added as reducing agents directly in the exhaust gas stream. In addition, the effect of different catalyst formulations and secondary hydrocarbon addition on particulate emissions is monitored. Finally, partial system optimization is performed and the applicability of such catalysts and systems to engines operating under the US Heavy Duty Transient Cycle is examined. As a result, simultaneous reduction of about 12% NOx and 25% particulate was achieved over the transient cycle with 2-3% fuel penalty, by the minor optimization of secondary fuel injection pattern and amount, and choice of catalyst.
|Technical Paper||Development of Oxidation and de-NOx Catalyst for High Temperature Exhaust Diesel Trucks|
|Technical Paper||Advanced Catalyst Studies of Diesel NOx Reduction for Heavy-Duty Diesel Trucks|
CitationKawanami, M., Horiuchi, M., Leyrer, J., Lox, E. et al., "Advanced Catalyst Studies of Diesel NOx Reduction for On-Highway Trucks," SAE Technical Paper 950154, 1995, https://doi.org/10.4271/950154.
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