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could change CO2 management and lead to other observations. It could also possibly promote some solution considered to improve performance. The dynamic DMFC modeling was focused on the effect of the two-phase flow at the anode but rather on the reaction mechanism. Even though it is highly simplified, this mechanism is somewhat consistent with reality as it contains two intermediate poisoning species. Their rate of reaction represents nevertheless a simplified global rate for a set of reaction coming from a more complicated mechanism. It was however sufficient to give reasonable predictions when operating conditions were changed. Rate constant in the model were fitted. However, better predictions could be made if the model could make a better estimate of the flux of methanol that diffuses to the cathode. The equation derived by Sundmacher et al [11] for NCH3OH underestimate the flux. Fitting tests for the diffusion coefficient of methanol could solve the problem. It needs to be replaced by a more accurate expression. Reaction route theory could give us a more precise idea on the importance of adsorbed CO and COOH based on the two graphs developed in the study. It is a powerful tool to study the mechanism. Unfortunately, at this point, computation of potential- dependant activation energies is still an issue. - 92 -PDF Image | Direct Methanol Fuel Cell (DMFC) Performance
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