Accession Number : AD0678384

Title :   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.

Corporate Author : PRINCETON UNIV N J

Personal Author(s) : Connoy,Jerome V. ; Mark,Peter

Report Date : OCT 1968

Pagination or Media Count : 104

Abstract : 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)

Descriptors :   (*CATALYSIS, ELECTRICAL CONDUCTIVITY), (*CARBON MONOXIDE, *CHEMISORPTION), CATALYSTS, ZINC COMPOUNDS, OXIDATION, OXYGEN, POLARIZATION, CRYSTAL LATTICES, WAVE FUNCTIONS, ELECTRON DENSITY, CHEMICAL ENGINEERING, THESES

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE