This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
In-Situ NH3 Generation for SCR NOx Applications
Technical Paper
2002-01-2872
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
There is currently a need for a practical solution for NOx abatement in automotive diesel engines. Technologies developed thus far suffer from inherent technical limitations. The selective catalytic reduction (SCR) of NOx under lean conditions has been proven to be successful for stationary applications.
A new approach is described to efficiently remove NOx from the exhaust of a diesel engine powered vehicle and convert it to nitrogen and oxygen. The key to the approach is the development of an on board (in-situ) ammonia generating catalyst. The ammonia is then used as a reagent to react with exhaust NO over a secondary SCR catalyst downstream. The system can remove over 85% of the exhaust NO under achievable diesel engine operating conditions, while eliminating the potential for ammonia slip with a minimal system of sensors and feedback controls.
Recommended Content
Authors
Citation
Ogunwumi, S., Fox, R., Patil, M., and He, L., "In-Situ NH3 Generation for SCR NOx Applications," SAE Technical Paper 2002-01-2872, 2002, https://doi.org/10.4271/2002-01-2872.Also In
References
- Khair, M. “SAE Seminar, Diesel Engine Technology 93014”
- Bosch H. Janssen F. Catalysis Today 2 1998 369
- Heck Ronald M. Farrauto Robert J. Catalytic Air Pollution Control John Wiley & Sons 166 1995
- Fritz A. Pitchon V. Applied Catalysis B: Environmental 13 1997 1 25
- Li. Y et. al. “Study of factors influencing the performance of a NOx Trap in a Light-Duty Diesel Vehicle” SAE 2000-01-0190
- Takiguchi. M et. Al. “Catalytic Engine Nox Reduction of Diesel Engines with New Concept Onboard Ammonia Synthesis System” SAE 920469
- Aika K. Kakegawa T. Catalysis Today 10 1991 73 80
- Hums. E Catalysis Today 42 1998 25 35