Modelling of the concentration–time relationship based on global diffusion-charge transfer parameters in a flow-by reactor with a 3D electrode

Abstract

A concentration versus time relationship model based on the isothermal diffusion-charge transfer mechanism was developed for a flow-by reactor with a three-dimensional (3D) reticulated vitreous carbon (RVC) electrode. The relationship was based on the effectiveness factor ( η) which lead to the simulation of the concentration decay at different electrode polarisation conditions, i.e. −0.1, −0.3 and −0.59 V versus SCE; the charge transfer process was used for the former and mix and a mass transport control was used for the latter. Charge transfer and mass transport parameters were estimated from experimental data using Electrochemical Impedance Spectroscopy (EIS) and Linear Voltammetry (LV) techniques, respectively.