A steady-state, isothermal, one-dimensional model of a direct methanol proton exchange membrane fuel cell (PEMFC), with a polybenzimidazole (PBI) membrane, was developed. The electrode kinetics were represented by the Butler–Volmer equation, mass transport was described by the multicomponent Stefan–Maxwell equations and Darcy's law, and the ionic and electronic resistances described by Ohm's law. The model incorporated the effects of temperature and pressure on the open circuit potential, the exchange current density, and diffusion coefficients, together with the effect of water transport across the membrane on the conductivity of the PBI membrane. The influence of methanol crossover on the cathode polarization is included in the model. The polarization curves predicted by the model were validated against experimental data for a direct methanol fuel cell (DMFC) operating in the temperature range of 125–175 °C. There was good agreement between experimental and model data for the effect of temperature and oxygen/air pressure on cell performance. The fuel cell performance was relatively poor, at only 16 mW cm−2 peak power density using low concentrations of methanol in the vapor phase.
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October 2013
This article was originally published in
Journal of Fuel Cell Science and Technology
Research-Article
A Model of a High-Temperature Direct Methanol Fuel Cell
M. Mamlouk
M. Mamlouk
School of Chemical Engineering
and Advanced Materials,
University of Newcastle Upon Tyne,
Merz Court,
and Advanced Materials,
University of Newcastle Upon Tyne,
Merz Court,
Newcastle-Upon-Tyne NE1 7RU
, UK
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K. Scott
e-mail: k. scott@newcastle.ac.uk
M. Mamlouk
School of Chemical Engineering
and Advanced Materials,
University of Newcastle Upon Tyne,
Merz Court,
and Advanced Materials,
University of Newcastle Upon Tyne,
Merz Court,
Newcastle-Upon-Tyne NE1 7RU
, UK
Contributed by the Advanced Energy Systems Division of ASME for publication in the Journal of Fuel Cell Science and Technology. Manuscript received March 7, 2011; final manuscript received October 5, 2012; published online August 20, 2013. Assoc. Editor: Jacob Brouwer.
J. Fuel Cell Sci. Technol. Oct 2013, 10(5): 051003 (12 pages)
Published Online: August 20, 2013
Article history
Received:
March 7, 2011
Revision Received:
October 5, 2012
Citation
Scott, K., Pilditch, S., and Mamlouk, M. (August 20, 2013). "A Model of a High-Temperature Direct Methanol Fuel Cell." ASME. J. Fuel Cell Sci. Technol. October 2013; 10(5): 051003. https://doi.org/10.1115/1.4024833
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