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Purification Characteristics of Catalytic Converters for Natural Gas Fueled Automotive Engine
Published November 01, 1991 by Society of Automotive Engineers of Korea in South Korea
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The purification performances of some kinds of catalytic converters ( Pt, Rh, Pd, Pd/Rh, Pd/Pt, Pt/Rh/Pd, Pt_Pd and Pd_Cu) were investigated to select suitable catalytic converters for natural gas fueled automotive engines. Pd series catalysts showed better performance among the noble metal catalysts for oxidation of unburned methane in exhaust gas. The optimum loading of Pd catalyst is the range of 1.6 to 3.2 g/L. The dual-bed catalyst, Pt_Pd, consisting of a Pt catalyst in the front and a Pd catalyst in the rear, showed a performance better than Pd series catalysts. When aged to an accumulated running distance of 50000 miles, the catalytic activity of the Rh catalysts is much reduced, but those of Pd and Pt catalyst are affected little by aging. The aged Pd/Rh catalyst showed superior emissions' purification performance at the stoichiometric condition, but poor at lean mixture conditions.
CitationSakai, T., Choi, B., Osuga, R., and Ko, Y., "Purification Characteristics of Catalytic Converters for Natural Gas Fueled Automotive Engine," SAE Technical Paper 912599, 1991.
- American Gas Association, Natural Gas and Climate Change: The Greenhouse effect Planning & Analysis Issues 1987-7
- Cullis C.F. Willatt B.M. Oxidation of Methane over Supported Precious Metal Catalysts J. of Catalysis 83 1983
- McCarty J.G. Lamoreaux R.H. Quinlan M.A. Methane Oxidation by Metal Oxide Catalysts 1989 Int. Gas Research Conf. 1989
- Klimstra J. Catalytic Converters for Natural Gas Fueled Engines - A Measurement and Control Problem SAE Paper No. 872165
- Kachi H. Akiyama K. Nakano N. Igarashi N. Development of Practical Simultaneous Analysis of Methanol and Formaldehyde from Methanol Fueled Vehicle JSAE 22 1 1991
- Mechanism D.L. Wailam C. The Combustion of Methane on Platinum-Allumina Fiber Catalyst-I Chemical Engineering Science 35 1980
- Ito K. Fujita O. Methanol Oxidation by Automotive Catalyst under Coexistence of NO JSAE 36 1987
- Hatsutori H. New Catalysis SANKYO Publication 1988