This work is aimed at modeling the operation of the FM01-LC reactor coupled with a continuous stirred tank (CST) in recirculation mode. The parametric flow dispersion model with an electrochemical reaction limited by mass transfer coupled with Poisson (tertiary potential distribution) and CST equations are used to describe the performance of a FM01-LC reactor with 3D electrodes. Theoretical predictions for dispersion reaction coupled with CST showed a good agreement with the experimental data on depletion of electroactive species as a function of time and potential distribution, whereas these data have not been adequately described by the plug-flow model. Fluid dispersion obtained in the reaction zone (depending on the fluid flow velocities and geometric configuration), plays an important role in tertiary potential distribution. (C) 2011 Elsevier Ltd. All rights reserved.