Reaction kinetics for carbon monoxide oxidation on a commercial three-way catalyst

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5869695

Jothi, N

It is well-known that automobile exhaust is a major cause of urban air pollution, and catalytic removal of pollutants has proven to be the most viable means of satisfying present environmental regulations. Carbon monoxide oxidation is a major automotive exhaust reaction. The kinetics of this reaction on three-way catalysts, preferred catalysts at present, are discussed. An experimental reactor system, based on the recycle reactor concept, was constructed to measure reaction kinetics. CO oxidation reaction was carried out in the presence of NO/sub 2/, CO/sub 2/, and H/sub 2/O at different temperatures and concentrations. The experimental data were analyzed for kinetic form and parameters, using the SIMPLEX optimization technique. Attendant diffusion-reaction equations were solved by employing orthogonal collocation technique. The bimolecular Langmuir-Henshelwood kinetic form is found to represent the data satisfactorily. Small amounts of SO/sub 2/ present in the automotive exhaust are known to deactivate the catalyst considerably. To determine the extent of this poisoning effect, the reaction kinetics for CO oxidation were also measured in the presence of 20 ppm SO/sub 2/ in the feed stream.

• OSTI ID: 5869695
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AUTOMOBILES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC CONVERTERS
CHALCOGENIDES
CHEMICAL REACTIONS
EQUATIONS
EQUIPMENT
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDROGEN COMPOUNDS
KINETICS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
OPTIMIZATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
VEHICLES
WASTES
WATER