This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Lead-Tolerant Catalysts for Europe: The Behavior of Precious Metals on Alumina Pellets When Used with 0.15 or 0.40 g/l Lead in Gasoline
Annotation ability available
Sector:
Language:
English
Abstract
It may be necessary to have recourse to catalysts in Europe to reduce automotive emissions if future legislation imposes very strict limits. Since it is not desirable to forbid the use of lead-base additives in gasoline, such catalysts must be able to withstand lead poisoning.
An analysis of poisoning shows that some catalysts resist this form of deactivation better than others and that the same catalyst ages more or less quickly depending on the conditions under which it is used.
Improved endurance performances can be obtained by optimizing the active phase of catalysts and their supports, as well as by implementing them at high temperatures. With gasoline containing 0.15 g/l of lead and after 40 000 km of effective running, 80% CO oxidation and 65% unburned-hydrocarbon oxidation were obtained. With 0.4 g/1 of lead, plugging occurs more quickly, and the reaction of lead deposits with the support at high temperatures tends to degrade the mechanical properties of catalysts.
Authors
Citation
Prigent, M., Brunelle, J., Blanchard, G., and Dozière, R., "Lead-Tolerant Catalysts for Europe: The Behavior of Precious Metals on Alumina Pellets When Used with 0.15 or 0.40 g/l Lead in Gasoline," SAE Technical Paper 830269, 1983, https://doi.org/10.4271/830269.Also In
References
- Economic Commission for Europe, Regulation 15, TRANS/SC1/WP29/R204 28 March 1980
- Raynal B. “Moteurs thermiques et pollution atmosphérique : contrô1e des véhicules automobiles,” Techniques de l’Inqénieur 8 B378,2 1982
- Kahsnitz R. “The Rational Utilization of Fuels in Private Transport (RUFIT),” Proceedings 11th World Energy Conference, Vol. 3 201 212 Munich September 1980
- Brunelle J.P. Dexpert H. Freund E. Prigent M. Sugier A. “Etude en microscopic électronique á balayage par transmission (METB) de l’empoisonnement de catalyseurs de post-combustion automobiles,” French - Soviet Symposium on Catalysis Lille 1980
- Praline G. “Interaction de l’oxygène avec des surfaces mixtes platine rhénium et plomb platine ; application à l’oxydation catalytique du monoxyde de carbone des gaz d’échappement,” Thesis University of Nancy 1978
- Prigent M. Sugier A. “Compatibility between Using Leaded Fuels and Catalytic Automotive Exhaust Gas Purification,” Proceedings of the 5th Ibero-American Symposium On Catalysis 2 107 111 Lisbon 1976
- French patent No. 74 06395
- Gast R. A. “Pulsair ½ a Method For Exhaust System Induction of Secondary Air for Emission Control,”
- Application for French patent No. EH 81/19373