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COMBUSTOR STUDY OF THE DEACTIVATION OF A THREE-WAY CATALYST BY LEAD AND MANGANESE
Citation:
Duncan, J. AND J. Braddock. COMBUSTOR STUDY OF THE DEACTIVATION OF A THREE-WAY CATALYST BY LEAD AND MANGANESE. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-85/006 (NTIS PB85161222), 1985.
Description:
The activity and durability of a platinum-rhodium automotive three-way catalyst were investigated as a function of lead and manganese fuel levels using a pulse-flame combustor. Total hydrocarbons, carbon monoxide, and nitric oxide conversions and three-way (HC/CO/NO) conversion efficiency windows were determined for approximately 24,000 combustor-simulated miles. The window for 80% HC/CO/NO efficiency disappeared at approximately 9,000 miles, 13,500 miles, and 4,500 miles for 0.5 g of lead per gallon of fuel, 0.0625 g of manganese per gallon of fuel, and a combined manganese and lead misfueling study, respectively. The catalyst's nitric oxide reduction activity displayed the greatest sensitivity to catalytic poisoning with both lead and manganese fuels.