Automotive sulfate emission data

Conference · Tue Jan 01 00:00:00 EST 1974

OSTI ID:7180483

Somers, J H

Automotive sulfate emissions were measured from catalyst and noncatalyst cars in a series of studies. While two investigations found significant sulfate formation in noncatalyst cars, three studies found only trace levels from noncatalyst cars. All of the investigations showed much higher quantities of sulfate emitted from catalyst cars. Pelleted catalysts had much lower sulfate emissions over low speed Environmental Protection Agency Federal Test Procedures than monolith catalysts. This was probably due to temporary storage of sulfates on the catalyst due to chemical interaction with the alumina pellets. The sulfate compounds were, to a large degree, emitted later under higher speed conditions which resulted in higher catalyst temperatures which decomposed the alumina salt. Future work will be directed towards further elucidation of this storage mechanism as well as determining in detail how factors such as air injection rate and catalyst location affect sulfate emissions.

• OSTI ID: 7180483
• Resource Relation: Conference: Meeting on health consequences of environmental controls: impact of mobile emissions controls, Durham, NC, USA, 16 Apr 1974
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AUTOMOBILES
CATALYTIC CONVERTERS
EXHAUST GASES
TESTING
ALUMINIUM OXIDES
CHEMICAL REACTIONS
FEDERAL TEST PROCEDURE
SULFATES
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
EQUIPMENT
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
SULFUR COMPOUNDS
VEHICLES
WASTES
330700* - Advanced Propulsion Systems- Emission Control