This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Novel Mixed Metal Oxide Structure for Next Generation Three-Way Catalysts
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2015 by SAE International in United States
Annotation ability available
In the context of evolving market conditions the Three-Way Catalyst (TWC) is entering an exciting new phase. It remains the main emission control strategy for gasoline powered vehicles but a period of rapidly evolving engine development, tighter tailpipe regulations and material supply issues present a unique challenge to catalyst developers.
This paper presents an initial study outlining the development of spinel mixed metal oxides for application in modern TWC and addresses some specific challenges underlying this application. Lab and flow reactor data in the study showed how the spinel structure has significant potential in various aspects of the TWC with the necessary improvement in thermal stability. Some initial engine data show three-way performance at or near stoichiometric in a PGM and rare earth free spinel coating and a synergy effect when combined with PGM. An example of a simple calibration modification is shown exploiting the improved three-way window in a combined spinel/low PGM coating.
CitationGolden, S., Nazarpoor, Z., and Launois, M., "Novel Mixed Metal Oxide Structure for Next Generation Three-Way Catalysts," SAE Technical Paper 2015-01-1007, 2015, https://doi.org/10.4271/2015-01-1007.
- Theis, J. and Labarge, B., “An Air/Fuel Algorithm to Improve the NOx Conversion of Copper-Based Catalysts,” SAE Technical Paper 922251, 1992, doi:10.4271/922251.
- Nazarpoor, Z and Golden, S. J., “Thermally stable compositions of OSM free of rare earth metals”, patent No: US 8,853,121 B1.
- Nazarpoor, Z and Golden, S. J., “Method for improving lean performance of PGM catalyst systems: Synergized PGM”, patent No.: US 8,845,987 B1.
- Jones, C., Taylor, S H., Burrows, A., Crudace, M. J., Kiely, C. J., and Hutchings, H. J., “Cobalt promoted copper manganese oxide catalysts for ambient temperature carbon monoxide oxidation”, Chem. Commun., 1707-1709, 2008, doi:10.1039/b800052m
- Wang, H-P and Yeh, C-T., “On the reduction of copper oxide”, J. Chinese Chem. Soc., 30, 139-143, 1983.
- Webb, C. and Bykowski, B., “Development of a Methodology to Separate Thermal from Oil Aging of a Catalyst Using a Gasoline-Fueled Burner System,” SAE Technical Paper 2003-01-0663, 2003, doi:10.4271/2003-01-0663.