Advanced Catalyst Studies of Diesel NOx Reduction for On-Highway Trucks

950154

02/01/1995

Event
International Congress & Exposition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/950154
Pages
17
Citation
Kawanami, 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.
Additional Details
Publisher
Published
Feb 1, 1995
Product Code
950154
Content Type
Technical Paper
Language
English