Accession Number : AD0288131

Title :   POLARIZATION AT POROUS FLOW-THROUGH ELECTRODES

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK

Personal Author(s) : AUSTIN,L.G. ; KLIMPEL,R.R.

Report Date : SEP 1962

Pagination or Media Count : 1

Abstract : The combined effecth which an electrochemical reactant is flowing uniformly. A simplifie treatment neglecting ohmic resistance gives an equation which is easily solved. The inclusion of ohmic resistance leads to an equation which has no convenient analytical solution. This equation was solved numerically using a suitable range of parameters. These solutions show the respective effects of of electrochemical kinetics, ohmic resistance and mass transport were studied theoretically for a porous electrode through which an electrochemical reactant is flowing uniformly. A simplifie treatment neglecting ohmic resistance gives an equation which is easily solved. The inclusion of ohmic resistance leads to an equation which has no convenient analytical solution. This equation was solved numerically using a suitable range of parameters. These solutions show the respective effects ofALL THE IMPORTANT PARAMETERS, INCLUDING EXCHANGE CURRENT, CONCENTRATION, RATE OF FLOW, CONDUCTIVITY, THICKNESS OF ELECTRODE, ETC. The theory was tested with limited data available in the literature and was found to describe these results in a reasonably satisfactory manner. Discussion is given of the use of the theory in designing flow-through electrode systems. Possible applications of this technique are discussed briefly and the technique appears to have possibilities for the study of the effectiveness of electrode structure and area. (Author)

Descriptors :   *ELECTRODES, *KINETIC THEORY, DENSITY, ELECTRICAL CONDUCTIVITY, FLUID FLOW, POLARIZATION, POROSITY, RESISTANCE (ELECTRICAL)

Distribution Statement : APPROVED FOR PUBLIC RELEASE