In this work, we present a 1D + 1D model for liquid-feed DEFCs. One-dimensional convective transport along the channel is coupled to a one-dimensional model that accounts for species transport through the MEA, as well as electrochemical kinetics, including the mixed potential due to ethanol/acetaldehyde crossover. The complex kinetics of the multi-step ethanol oxidation reaction is described with the model proposed in . A simple along-the-channel convective model is used to describe the downstream variation of the concentrations of the different species. This provides, in particular, the variation of the local current density. The results show that the current density distribution is highly dominated by the decrease of the ethanol concentration down the anode channel, together with the change of the production/consumption rate of free species. The variation of the ethanol and acetaldehyde concentration impacts the anode reaction rates and the ethanol/acetaldehyde crossover flux, which affects the cathode reaction rates.
 J. Sánchez-Monreal, P. A. García-Salaberri, M. Vera, Mathematical Modeling of Direct Ethanol Fuel Cells Using a Multi-Step Chemical Kinetic Mechanism, ECS Trans. 72 (2016) 1-16.