Sulfate formation: catalyst and gas-phase composition effects in pulsators and comparison of three-way with oxidation catalysts

Journal Article · Tue Feb 01 04:00:00 EST 1977 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es60125a009· OSTI ID:7319611

Gandhi, H S; Otto, K; Piken, A G; Shelef, M

Results on SO/sub 2/ conversion over fresh and over well-characterized used fleet catalysts are presented. Evaluations are conducted with simulated exhaust from a laboratory pulse-flame apparatus. The experimental evidence indicates clearly the more demanding nature of the SO/sub 2/ oxidation as compared with CO or hydrocarbon oxidation. Hence, the SO/sub 2/ oxidation is more sensitive to space velocity, changes in the noble-metal makeup of the catalyst, and deactivation by poisoning. Mutual effects of exhaust and catalyst compositions are discussed. Finally, conversion measurements under steady-state conditions with synthetic gas mixtures are made for typical three-way catalysts.

• Research Organization: Ford Motor Co., Dearborn, MI
• OSTI ID: 7319611
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 11:2; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AUTOMOBILES
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
DEACTIVATION
EVALUATION
EXHAUST GASES
GASEOUS WASTES
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PULSE TECHNIQUES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SYNTHESIS
VEHICLES
VELOCITY
WASTES