This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Speciated Hydrocarbon Conversion on a Fresh Pd/Rh Three-Way Catalyst
Annotation ability available
Sector:
Language:
English
Abstract
Laboratory experiments were conducted to evaluate a commercial Pd/Rh three-way catalyst as regards its effectiveness in the catalytic oxidation of hydrocarbons (HC) under conditions encountered in spark ignition engine exhaust (air/fuel ratio = 14.7). These tests aimed to determine light-off temperatures (50 % conversion temperatures) for HC, CO and NO in mixtures containing CO2, H2O, H2, CO, NO, O2, N2 and one hydrocarbon.
First, the effect of the concentration of different compounds (H2O, H2, CO, NO) on the catalytic oxidation of propane was studied.
The oxidation of the most important HC species, i.e. alkanes (C1 to C7), alkenes (C2 to C6), alkenes (C2 to C6) and aromatics (C6 to C9), was then investigated. The results were compared to those obtained with a Pt/Rh catalyst.
The inhibiting effect of hydrocarbons as concerns CO oxidation and NO reduction was finally examined.
Recommended Content
Authors
Citation
Amon-Mézière, I., Castagna, F., Prigent, M., and Pentenero, A., "Speciated Hydrocarbon Conversion on a Fresh Pd/Rh Three-Way Catalyst," SAE Technical Paper 950932, 1995, https://doi.org/10.4271/950932.Also In
Global Emission Experiences: Processes, Measurements, and Substrates
Number: SP-1094; Published: 1995-02-01
Number: SP-1094; Published: 1995-02-01
References
- Bart J.M. University of Nancy-1 1992
- Bart J.M. Pentenero A. Prigent M. “Experimental Comparison Among Hydrocarbons and Oxygenated Compounds for their Elimination by Three-Way Automotive Catalysts” Catalytic Control of Air Pollution - Mobile and Stationary Sources, ACS Symposium 42 60 Washington 1992
- Bart J.M. Pentenero A. Prigent M. “Study of Hydrocarbon Removal with a Three-Way Automotive Catalyst after Severe Thermal Aging” 3rd Int. Congr. on Catalysis and Automotive Pollution Control: CAPoC3 Brussels April 1994
- Cullis C.F. Willat B.M. “Oxidation of Methane over Supported Precious Metals Catalysis” J. Catal. 83 1983 267
- Oh S.H. Mitchell P.J. Siewert R.M. “Methane Oxidation over Alumina-Supported Noble Metal Catalysts with and without Cerium Additives” J. Catal. 132 1991 287
- Yao Y.F. Yu “Oxidation of Alkanes over Noble Metal Catalyst” Ind. Eng. Chem. Prod. Res. Dev. 19 1980 293
- Yao Y.F. Yu “Oxidation of CO and Hydrocarbons over Noble Metal Catalyst” J. Catal. 87 1984 152
- Kooh A.B. Han W.J. Lee R.G. Hicks R.F. “Effect of Catalyst Structure and Carbon Deposition on Heptane Oxidation over Supported Platinum and Palladium” J. Catal. 130 1991 374
- Godolets G.I. “Heterogeneous Catalytic Reactions Involving Molecular Oxygen” Stud. Surf. Sci. Catal. 15 Elsevier Amsterdam 1983
- Schwartz A. Hombrook L.L. Wise H. “Catalytic Oxidation Studies with Platinum and Palladium” J. Catal. 21 1971 199
- Mabilon G. Durand D. Courty P. Inhibition of Post-Combustion Catalysts by Alkynes: A Clue for Understanding their Behaviour Under Real Exhaust Conditions” CAPoC3 Brussels April 1994
- Bodrikov I. Khulbe K.C. Mann R.S. “Electron Spin Resonance Studies of Donor and Acceptor Properties of Alumina, Silica, Alumina-Pailadium and Silica-Palladium Catalysts” J. Catal. 43 1976 339
- Hicks R.F. Rigano C. Pang B. “Thermal Stability of Palladium on Ceria-Doped Alumina” Catal. Lett. 6 1990 271
- Yokota K. Muraki H. Fujitani Y. “Rh-Free Three-Way Catalysts for Automotive Exhaust Control” SAE paper 850129 1985
- Muraki H. “Performance of Palladium Automotive Catalysts” SAE paper 910842 1991
- Muraki H. Yokota K. Fujitani Y. “Nitric Oxide Reduction Performance of Automotive Palladium Catalysts” Appl. Catal. 48 1989 93
- Shinjoh H. Muraki H. Fujitani Y. “Effect of Severe Thermal Aging on Noble Metal Catalysts” Stud. Surf. Sci. Catal. 71 1991 617
- Lemaire A. Massardier J. Praliaud H. Mabilon G. Prigent M. “Comparative Behaviour of Pd Supported Catalysts for the Reduction of NO by CO in the Presence of Gas Complex Mixture Including O 2 , CO 2 , H 2 O and Hydrocarbons” CAPoC3 Brussels April 1994
- Engler B.H. Lindner D. Lox E.S. Schäfer-Sindlinger A. “Development of Improved Pd-only and Pd/Rh Three-Way Catalysts” CAPoC 3 Brussels April 1994
- Dettling J.C. Hu Z. Lui Y.K. Smaling R.M. Wan C.Z. Punke A. Dahle U. “Smart Pd TWC Technology to Meet Stringent Standards” CAPoC 3 Brussels April 1994
- Summers J.C. Baron K. “The Effect of SO2 on the Performance of Noble Metal Catalysts in Automobile Exhaust” J. Catal. 57 1979 380
- Gandhi H.S. Shelef M. “Effects of Sulfur on Noble Metal Automotive Catalysts” Appl. Catal. 77 1991 175