Modeling of passive direct ethanol fuel cells

V. B. Oliveira, J. P. Pereira, A. M.F.R. Pinto

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

Direct ethanol fuel cells (DEFCs) are promising substitute power sources for compact and mobile applications. Passive feed systems are especially desirable because they are less expensive, more compact and simpler than the active systems. Aiming for the introduction of passive DEFCs in the market, this work describes a steady-state and one-dimensional model considering the electrochemical reactions and all the transport phenomena (heat and mass transport) occurring in a passive feed DEFC. This model can be used to estimate the concentration profiles of the different chemical species, as well as, the temperature distribution on the different layers. Moreover, the model can accurately predict the influence of the operating conditions and design parameters on the ethanol and water crossover rate. The model predictions for the polarization curves are successfully compared with recent published data for different ethanol concentrations. The current model is rapidly implemented and can be a useful tool to optimize the performance of a passive DEFC.

Original languageEnglish
Pages (from-to)652-665
Number of pages14
JournalEnergy
Volume133
DOIs
Publication statusPublished - 2017

Keywords

  • Ethanol crossover
  • Fuel cell performance
  • Modeling
  • Passive direct ethanol fuel cell
  • Water crossover

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