ELECTRICAL CONDUCTIVITY CHANGES DURING HETEROGENEOUS CATALYSIS: A STUDY OF THE INTERFACIAL POLARIZATION OF A POWDERED ZINC OXIDE CATALYST BY AUDIO FREQUENCY RELAXATION MEASUREMENTS DURING THE CATALYTIC OXIDATION OF CARBON MONOXIDE.
PRINCETON UNIV N J
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The electrical conductivity changes of an industrial, powdered zinc oxide catalyst during the chemisorption and catalytic oxidation of carbon monoxide in an isothermal tubular reactor were derived from a study of interfacial polarization by a dispersion analysis of audio frequency relaxation measurements in situ at conditions of temperature 100C - 350C and pressure 5 p.s.i.g. encountered in industrial process systems. The conductivity changes observed during carbon monoxide oxidation are consistent with both the equilibrium conversion of oxygen as a function of residence time, and the Arrhenius dependence of the oxidation rate constant. Although a conductivity-activity correlation has not yet been quantitatively established, owing to instrumentation limitations, the asymptotic behavior of oxygen conversion as a function of residence time indicates the existence of such a correlation. Author
- Physical Chemistry