caa a22 4500 475815041 CHVBK 20180406123807.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1023/A:1004086402501 doi (NATIONALLICENCE)springer-10.1023/A:1004086402501 Kulikovsky A.A. Institute for Materials and Processes in Energy Systems (IWV-3), Research Center "Jülich”, D-52425, Jülich, Germany aut Two-dimensional numerical modelling of a direct methanol fuel cell [Elektronische Daten] [A.A. Kulikovsky] The results of a numerical simulation of a direct methanol fuel cell (DMFC) with liquid methanol feed are presented. A two-dimensional numerical model of a DMFC is developed based on mass and current conservation equations. The velocity of the liquid is governed by gradients of membrane phase potential (electroosmotic effect) and pressure. The results show that, near the fuel channel, transport of methanol is determined mainly by the pressure gradient, whereas in the active layers, and in the membrane, diffusion transport dominates. ‘Shaded' zones, where there is a lack of methanol, are formed in front of the current collectors. The results reveal a strong influence of the hydraulic permeability of the backing layer K p BL on methanol crossover through the membrane. If the value of K p BL is comparable to that of the membrane and active layers, electroosmotic effects lead to the formation of an inverse pressure gradient. The flux of liquid driven by this pressure gradient is directed towards the anode and reduces methanol crossover. Kluwer Academic Publishers, 2000 DMFC nationallicence methanol crossover nationallicence numerical modelling nationallicence Journal of Applied Electrochemistry Kluwer Academic Publishers 30/9(2000-09-01), 1005-1014 0021-891X 30:9<1005 2000 30 10800 https://doi.org/10.1023/A:1004086402501 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1004086402501 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kulikovsky A.A. Institute for Materials and Processes in Energy Systems (IWV-3), Research Center "Jülich”, D-52425, Jülich, Germany aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/9(2000-09-01), 1005-1014 0021-891X 30:9<1005 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer