Kinetic study of the reaction between nitric oxide and carbon monoxide catalyzed by clean polycrystalline platinum

Thesis/Dissertation · Sat Dec 31 23:00:00 EST 1983

OSTI ID:6237304

Klein, R L

The kinetics of the platinum catalyzed reaction between NO and CO has been studied under conditions chosen to approximate those observed during operation of catalysts in automotive exhaust gas treatment applications. The catalysts were polycrystalline platinum foils and wires. The reaction was studied over a range of reactant partial pressures of 10 V Torr to 1 Torr and catalyst temperatures of 500 to 1500K. The steady-state kinetics results could not be fit by a simple Langmuir-Hinshelwood kinetic model over all experimental conditions studied. The kinetics at high coverage were most consistent with Langmuir-Hinshelwood kinetics assuming a bimolecular reaction between NO and CO as the rate-limiting step. At high temperature, the Langmuir-Hinshelwood assumption of fast adsorption-desorption equilibrium relative to the surface reaction rate was no longer appropriate and the mechanism of adsorption of NO had to be considered explicitly.

• Research Organization: Minnesota Univ., Minneapolis (USA)
• OSTI ID: 6237304
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AUTOMOBILES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYSTS
CATALYTIC CONVERTERS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DATA
ELEMENTS
EQUIPMENT
EXHAUST GASES
EXPERIMENTAL DATA
FLUIDS
GASEOUS WASTES
GASES
HIGH TEMPERATURE
HIGH VACUUM
INFORMATION
KINETICS
MATHEMATICAL MODELS
MEDIUM VACUUM
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
SIMULATION
SORPTION
STEADY-STATE CONDITIONS
TRANSITION ELEMENTS
VEHICLES
VERY HIGH TEMPERATURE
WASTES