Electrochemical studies of oxygen activity during the catalytic oxidative coupling of methane

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6795908

McKown, J W

The oxidative coupling of methane over a Li-promoter MgO catalyst was studied with the aid of solid electrolyte potentiometry. This technique allows the measurement of the thermodynamic activity of oxygen on a catalyst surface under reaction conditions. This additional measurement may be used to establish what types of reactions must be involved in the formation of the coupling products. It was found that the catalytic reaction lowered the steady state amount of surface oxygen from its equilibrium value. This derivation from gas-surface equilibrium will be correlated with the selectivity of the reaction for the production of ethylene and ethane compared to the deep oxidation products such as carbon dioxide. These studies suggest that the formation of the coupling product, ethylene and ethane, must involve a depletion of mobile oxygen from the oxide catalyst surface. A reaction mechanism consistent with these observations.

• Research Organization: Rochester Univ., NY (USA)
• OSTI ID: 6795908
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELEMENTS
EQUILIBRIUM
ETHANE
ETHYLENE
HYDROCARBONS
KINETICS
LITHIUM
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POTENTIOMETRY
REACTION KINETICS
REFORMER PROCESSES
SURFACE PROPERTIES
SYNTHESIS
THERMODYNAMIC ACTIVITY
TITRATION