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Control of Automotive Emissions by Particulate Catalysts
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English
Abstract
Particulate catalysts, consisting of porous solid particles, have been under intensive development for the control of automotive emissions. Such catalysts contain base metal and/or noble metal active components dispersed on high surface area alumina supports. Consideration is given to the physical and chemical properties of both supports and catalysts, and to the relationship between some of these properties and catalytic performance. It has been found that low bulk density and the presence of macroporosity improve conversion efficiency. At high temperatures, transformation of the support from a high surface area alumina to crystalline alpha alumina causes shrinkage, a deterioration of mechanical properties, and catalyst deactivation. Support interactions with certain activity promoters accelerate this adverse transformation. Stabilizers have been found that repress the alpha alumina transformation. Base metal catalysts are extremely sensitive to sulfur poisoning. Resistance to sulfur poisoning can be increased substantially by promotion of base metal catalysts with noble metals.
Authors
Citation
Roth, J. and Gambell, J., "Control of Automotive Emissions by Particulate Catalysts," SAE Technical Paper 730277, 1973, https://doi.org/10.4271/730277.Also In
References
- Roth J. F. Doerr R. C. Ind. Eng. Chem. 53 1961 293
- Zmuda J. P. Popular Science December 1970 49
- Hunter, J. E. Jr. “Effect of Catalytic Converters on Automotive Ammonia Emissions.” Central States Section of the Combustion Institute Ann Arbor, Mich. March 1971
- Anderson R. B. Stein K. C. Feenan J. J. Hofer L. J. E. Ind. Eng. Chem. 53 1961 809
- Spenadel L. Boudart M. J. Phys. Chem. 64 1960 204
- Adler S. F. Keavney J. J. J. Phys. Chem. 64 1960 208
- Wolberg A. Roth J. F. J. Catalysis 15 1969 250
- Wolberg A. Ogilvie J. L. Roth J. F. J. Catalysis 19 1970 86
- Roth J. F. Ind. Eng. Chem., Prod. Res. Develop. 10 1971 381
- Summers J. C. Klimisch R. C. Preprints, V International Congress on Catalysis Palm Beach, Fla. August 1972
- Dwyer F. G. Catalysis Reviews 6 1972 2 261
- Lunt R. S. et al. “Application of a Monel-Platinum Dual-Catalyst System to Automotive Emission Control.” Paper 720209 SAE Automotive Engineering Congress Detroit January 1972
- Klimisch R. L. Taylor K. C. “Dual Functionality and Synergism in the Catalytic Reduction of Mitric Oxide.” General Motors Report 1195 California Catalysis Society meeting San Francisco April 1972
- Wefers K. Bell G. M. “Oxides and Hydroxides of Aluminum.” Technical Paper No. 19 Alcoa Research Laboratories 43 1972
- Gitzen W. H. “Alumina as a Ceramic Material.” The American Ceramic Society Columbus, Ohio 1970 43
- Gitzen W. H. op. cit. 23
- Fink G. 2 1965 32
- Klimisch R. L. “The Control of Automotive Exhaust Emissions by Catalysis.” First Automotive Emissions Conference Michigan Section of American Ceramic Society Flint Sept. 15 1972
- Smith A. E. Beeck O. A. June 10 1947
- Voltz S. E. Weller S. W. Oct. 22 1957