Development of scavenger-free three-way automotive emission control catalysts with reduced hydrogen sulfide formation
Fundamental research work was undertaken to elucidate the mechanism of hydrogen sulfide formation on three-way automotive exhaust catalysts during the lean to rich engine operation sequence and to identify the role of the different catalyst components in this phenomenon. Based upon this knowledge, new catalysts were developed with reduced ability to form hydrogen sulfide by minimizing the storage of sulfur oxides. Engine dynamometer tests confirmed that the suppression of the hydrogen sulfide formation was obtained without loss of catalyst activity or aging stability. The role of the catalyst's age in the hydrogen sulfide formation is discussed. The development presented shows that it is possible to avoid scavengers to minimize the emission of hydrogen sulfide from three-way emission control catalysts.
- OSTI ID:
- 5492947
- Report Number(s):
- CONF-890240-
- Resource Relation:
- Conference: Society of Automotive Engineers international congress and exposition, Detroit, MI (USA), 27 Feb - 3 Mar 1989; Other Information: Technical Paper 890795
- Country of Publication:
- United States
- Language:
- English
Similar Records
Thermally-induced microstructural changes in a three-way automotive catalyst
Rh-free three-way catalysts for automotive exhaust control
Related Subjects
54 ENVIRONMENTAL SCIENCES
CATALYSTS
CHEMICAL REACTION YIELD
HYDROGEN SULFIDES
AIR POLLUTION CONTROL
INTERNAL COMBUSTION ENGINES
CATALYTIC CONVERTERS
DESULFURIZATION
EMISSION
EXHAUST GASES
REDUCTION
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ENGINES
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
WASTES
YIELDS
330700* - Advanced Propulsion Systems- Emission Control
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)