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Journal Article

Direct methanol polymer electrolyte fuel cell : analysis of charge and mass transfer in the vapour-liquid-solid system


Sundmacher,  K.
Process Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;
Otto-von-Guericke-Universität Magdeburg, External Organizations;

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Sundmacher, K., & Scott, K. (1999). Direct methanol polymer electrolyte fuel cell: analysis of charge and mass transfer in the vapour-liquid-solid system. Chemical Engineering Science, 54, 2927-2936. doi:10.1016/S0009-2509(98)00344-3.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-A2C9-2
Liquid-feed direct methanol fuel cell systems (DMFC) have a number of advantages over hydrogen fuel cells. For a DMFC no additional fuel processing is necessary, it has a lower volume and a lower weight, the existing infrastructure for fuel supply and distribution can be utilized and the fuel costs are low. However, a number of technical problems have still to be solved. The most important are the cross-over of methanol through the polymer electrolyte membrane, the removal of carbon dioxide from the anode catalyst layer, and the poor anode kinetics. These aspects are analysed by means of a steady state, isothermal cell model which accounts for the essential mass and charge transport processes in the different fuel cell layers. The model is applied to evaluate experimental current-voltage data which were obtained from a small scale cell fuelled with liquid mehtanol/water solutions.