Durability of palladium automotive catalysts: effects of trace lead levels, exhaust composition, and misfueling
The activity and durability of Pd catalysts were investigated as a function of trace Pb levels in fuel, exhaust composition and misfueling with leaded fuels to determine their potential as automotive emission three-way catalysts. In laboratory durability studies, Pd catalysts showed significant impr...
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| Veröffentlicht in: | Industrial & engineering chemistry product research and development 1984-12, Vol.23 (4), p.531-536 |
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| container_title | Industrial & engineering chemistry product research and development |
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| creator | Williamson, W. Burton Lewis, Dezmonia Perry, James Gandhi, Haren S |
| description | The activity and durability of Pd catalysts were investigated as a function of trace Pb levels in fuel, exhaust composition and misfueling with leaded fuels to determine their potential as automotive emission three-way catalysts. In laboratory durability studies, Pd catalysts showed significant improvement for nitric oxide (NO) and hydrocarbon (HC) conversions as trace Pb levels decreased in the range 12 mg of Pb/gal to Pb-sterile fuel. Lean exhaust gas compositions during catalyst aging significantly improved the performance of the Pd catalyst for NO conversions near stoichiometry, improved HC conversions during rich excursions and substantially lowered HC light-off temp. Results on Pd catalysts of experiments designed to mimic misfueling with Pb levels typical of commercial leaded fuels are discussed. The practical implications of these results toward the design of future automotive emission systems are considered. 22 ref.--AA |
| doi_str_mv | 10.1021/i300016a004 |
| format | Article |
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| identifier | ISSN: 0196-4321 |
| ispartof | Industrial & engineering chemistry product research and development, 1984-12, Vol.23 (4), p.531-536 |
| issn | 0196-4321 1541-4841 |
| language | eng |
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| source | American Chemical Society Journals |
| subjects | Air pollution caused by fuel industries Applied sciences Atmospheric pollution Combustion and energy production Energy Energy. Thermal use of fuels Exact sciences and technology Pollution Pollution reduction Prevention and purification methods Stack gas and industrial effluent processing |
| title | Durability of palladium automotive catalysts: effects of trace lead levels, exhaust composition, and misfueling |
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