NOx Abatement for Diesel Engines: Reductant Effects; Engine vs. Reactor Tests

962043

10/01/1996

Event
1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
Catalytic reduction of NOx from heavy duty diesel engines via addition of reductant to the exhaust is accompanied by a substantial exotherm in the catalyst bed which does not occur, for example, in a diesel oxidation catalyst. Engine tests show that thermal management in the aftertreatment system is required for optimum reductant use and maximum NOx conversion by the low-temperature (200-300°C) catalyst NSP-5, but of less importance with the high temperature (> 350°C) Catalyst A. Understanding thermal effects is also important for reconciling test results in the near-adiabatic environment of a full-sized catalyst on an engine with the near-isothermal one of a test piece in a laboratory reactor. The effects of reductant type and concentration on NOx conversion on NSP-5 were shown to result in part from non-steady state behavior of the catalyst during steady state engine operation.
Meta TagsDetails
DOI
https://doi.org/10.4271/962043
Pages
10
Citation
Rice, G., Deeba, M., and Feeley, J., "NOx Abatement for Diesel Engines: Reductant Effects; Engine vs. Reactor Tests," SAE Technical Paper 962043, 1996, https://doi.org/10.4271/962043.
Additional Details
Publisher
Published
Oct 1, 1996
Product Code
962043
Content Type
Technical Paper
Language
English