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Catalytic Coating for Effective Emission Reduction in a Small Motorcycle Application
Technical Paper
2009-32-0158
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English
Abstract
This paper will present a comparison of different catalytic coatings especially designed for small motorcycle application with regard to activity, durability and precious metal costs. Since recent catalytic formulations for this application widely use rather expensive platinum (Pt) -rhodium (Rh) formulations, this paper will present data for less expensive coatings which use palladium (Pd) as the main or the only active precious metal compound. Besides the fresh catalytic activity the thermal and chemical aging stability will be compared for PtRh, PtPdRh and Pd-only formulations. We will show that also less expensive Pd-rich catalytic coatings can be used for an effective emission reduction of small motorcycles.
The presented data have been obtained by synthetic gas reactor testing using a simulated engine exhaust gas for coated catalysts as well as for thermally and chemically aged catalysts. Chemical aging was performed by impregnation of poisonous elements like Ca, Zn and P simulating a real life aging process; thermal aging was performed in an oven.
In addition, the activity of different formulations has been tested using a 125cc motorcycle, running the ECE R40 cold-start cycle which is used for the Euro 3 and China 3 emission regulation for motorcycles. These results will be correlated with the results of the synthetic gas reactor tests.
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Authors
Topic
Citation
Wille, A. and Bonifer, M., "Catalytic Coating for Effective Emission Reduction in a Small Motorcycle Application," SAE Technical Paper 2009-32-0158, 2009.Also In
References
- GB 14622-2007 Ministry of Environmental Protection of Republic of China 2007
- http://www.heraeus-trading.com/en/edelmetallpreiseundcharts
- http://www.kitco.com
- Eastwood P. “Critical Topics in Exhaust Gas Catalysis” 2000 Research Studies Press
- Heck R.M. Farrauto R.J. “Catalytic Air Pollution Control” 1995 van Nostrand Reinhold
- Jatkar A.D. SAE 971032 “A New Catalytic Support Structure for Automotive Catalysts” 1997
- Muraki H. SAE 910842 “Performance of Palladium Automotive Catalysts” 1991
- Matsunaga S. Yokota K. Hyodo S. Suzuki T. Sobukawa H. SAE 982706 “Thermal Deterioration Mechanisms of Pt/Rh Three-Way Catalysts” 1998
- Miyoshi N. Matsumoto S. Ozawa M. Kimura M. SAE 891970 “Development of Thermal Resistant Three-Way Catalysts” 1989