Axial dispersion in flow porous electrodes

The coefficient of axial dispersionD_L in a porous electrode, composed of rolled 80-mesh platinum screen, was determined using the process of the flow electrolysis of 2.0×10^–3 M K₃Fe(CN)₆ in 1 MKCl in water. The results were analysed in the light of an earlier model for flow electrodes.List of symbols a Electrode cross-sectional area (cm²) - b Empirical constant - c₀ Initial concentration of substrate (mol ml^–1) - D_L Axial dispersion coefficient (cm² s^–1) - D^* Effective dispersion coefficient (cm² s^–1) - F Faraday constant (C mol^–1) - I₁ Limiting current (A) - L Electrode height (cm) - R Limiting degree of conversion of substance - v Volume flow rate (ml s^–1) - Empirical constant - Electrode porosity