Development of a Lean-NOx Catalyst Containing Metal-Ligand Complex Impregnated Molecular Sieves 962050
This paper describes the development and evaluation of an operative catalyst for the reduction of NOx in lean exhaust. A catalyst that incorporates iron (II)-complex impregnated modified mesoporous molecular sieves (MCM-41) has been synthesized and further treated with [pd(NH3)4]Cl2 . Experimental results suggest a hydrocarbon-independent reduction of NOx takes place on the iron center, and oxidation of CO is assisted by the palladium ion. The catalytic activity toward HC CO, and NOx removal was studied with simulated and real engine exhaust in the laboratory and on an engine, respectively. Engine test results demonstrate a reduction of NOx of up to 10 percent at catalyst inlet temperatures in the range of 260°C to 280°C. In this paper, possible NOx reduction pathways are also discussed.
Citation: Paul, P., Heimrich, M., Miller, M., and Schwab, S., "Development of a Lean-NOx Catalyst Containing Metal-Ligand Complex Impregnated Molecular Sieves," SAE Technical Paper 962050, 1996, https://doi.org/10.4271/962050. Download Citation
Partha P. Paul, Martin J. Heimrich, Michael A. Miller, Stuart T. Schwab
Southwest Research Institute
1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Diesel/Lean Nox Catalyst Technologies-SP-1211