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  Dynamics of the direct methanol fuel cell (DMFC) : experiments and model-based analysis

Sundmacher, K., Schultz, T., Zhou, S., Scott, K., Ginkel, M., & Gilles, E. D. (2001). Dynamics of the direct methanol fuel cell (DMFC): experiments and model-based analysis. Chemical Engineering Science, 56(2), 333-341. doi:10.1016/S0009-2509(00)00233-5.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-A1E9-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-ACEE-9
Genre: Journal Article

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Sundmacher, Kai1, 2, Author              
Schultz, Thorsten1, Author              
Zhou, S.2, Author
Scott, K.3, Author
Ginkel, Martin4, Author              
Gilles, E. D.4, Author              
Affiliations:
1Process Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738151              
2Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              
3Department of Chemical and Process Engineering, University of Newcastle, Merz Court, Newcastle upon Tyne NE1 7RU, United Kingdom , ou_persistent22              
4Systems Biology, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738155              

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 Abstract: A laboratory-scale liquid-feed direct methanol fuel cell (DMFC) was operated with different methanol fuel feeding strategies. A proton exchange membrane (PEM) was used as the elecytrolyte. The cell voltage response to dynamic feeding of methanol revealed that a significant voltage increase can be obtained from dynamic changes in methanol feed concentration. The observed fuel cell behaviour was analysed with a mathematical model which consists of anode mass balances, charge balances of both electrodes and electrode kinetic expressions. Anode kinetics were derived from a four-step reaction mechanism with several intermediates bound to the catalyst surface. The model also accounts for the undesired cross-over of methanol, through the PEM, towards the cathode catalyst layer. First, the model is applied to predict steady-state current-voltage characteristics. Then, the cell voltage response to dynamic changes of methanol feed concentration is simulated. The simulated results are in full agreement to experimental observations. It turns out that methanol cross-over can be reduced by periodically pulsed methanol feeding. © 2001 Elsevier Science Ltd. All rights reserved. [accessed 2014 February 13th]

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 Dates: 2001
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 193324
DOI: 10.1016/S0009-2509(00)00233-5
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Title: Chemical Engineering Science
  Other : Chem. Eng. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Pergamon
Pages: - Volume / Issue: 56 (2) Sequence Number: - Start / End Page: 333 - 341 Identifier: ISSN: 0009-2509
CoNE: https://pure.mpg.de/cone/journals/resource/954925389239