Control Strategy for the Removal of NOx from Diesel Engine Exhaust using Hydrocarbon Selective Catalytic Reduction 2008-01-2486
A unique catalyst developed using high-throughput discovery techniques in collaboration with BASF Corporation and Accelrys, Inc. was investigated at General Motors under simulated diesel engine exhaust feed conditions for the selective catalytic reduction of NOx. A hydrocarbon mixture was used as the reductant to model the multi-component nature of diesel fuel and the catalyst was evaluated over a wide range of temperatures (150 - 550°C) relevant to light-duty diesel exhaust. This report investigates the effects of NOx (as NO or NO2), hydrocarbon concentration level (HC:NOx ratio), oxygen concentration, NO concentration, catalyst space velocity, catalyst temperature, and the co-presence of hydrogen on steady-state NOx reduction activity. Using these results, a control strategy was developed to maximize NOx conversion over the wide-ranging exhaust conditions likely to be encountered in light-duty diesel applications.
Citation: Schmieg, S., Blint, R., and Deng, L., "Control Strategy for the Removal of NOx from Diesel Engine Exhaust using Hydrocarbon Selective Catalytic Reduction," SAE Int. J. Fuels Lubr. 1(1):1540-1552, 2009, https://doi.org/10.4271/2008-01-2486. Download Citation
Steven J. Schmieg, Richard J. Blint, Ling Deng
General Motors R&D Center, Optimal Computer Aided Engineering
Powertrains, Fuels and Lubricants Meeting
SAE International Journal of Fuels and Lubricants-V117-4EJ, SAE International Journal of Fuels and Lubricants-V117-4