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SOFC modeling at the cell scale including hydrogen and carbon monoxide as electrochemically active fuels

Andersson, Martin LU ; Navasa, Maria LU ; Yuan, Jinliang LU and Sundén, Bengt LU (2012) ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability In ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability p.281-291
Abstract

Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion... (More)

Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion transport in the YSZ material are found to be the major part of the potential losses. The activation polarization is the most significant and it is smaller within the cathode compared to the anode for this study. The ion current density and the activation polarization are the highest at the electrolyte-electrode interface and decrease rapidly within the electrodes as the distance from the interface increases. However, the ohmic polarization by ion transfer increases for the positions away from the interface. The addition of the electrochemical reaction with CO as fuel increases the current density. It is concluded that the temperature and current density are strongly integrated and when any of them is changed, the other follows, and the change is accelerated. Copyright © 2012 by ASME.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
2D, Carbon monoxide, Cell scale, Electrochemical reactions, Hydrogen, Modeling, SOFC
in
ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability
pages
11 pages
publisher
The American Society of Mechanical Engineers - ASME
conference name
ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability
external identifiers
  • Scopus:84892664026
ISBN
9780791844823
language
English
LU publication?
yes
id
ac5602be-bb4d-4b6d-871c-12b33fa01a54
date added to LUP
2016-04-18 14:02:11
date last changed
2016-05-03 09:11:17
@misc{ac5602be-bb4d-4b6d-871c-12b33fa01a54,
  abstract     = {<p>Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion transport in the YSZ material are found to be the major part of the potential losses. The activation polarization is the most significant and it is smaller within the cathode compared to the anode for this study. The ion current density and the activation polarization are the highest at the electrolyte-electrode interface and decrease rapidly within the electrodes as the distance from the interface increases. However, the ohmic polarization by ion transfer increases for the positions away from the interface. The addition of the electrochemical reaction with CO as fuel increases the current density. It is concluded that the temperature and current density are strongly integrated and when any of them is changed, the other follows, and the change is accelerated. Copyright © 2012 by ASME.</p>},
  author       = {Andersson, Martin and Navasa, Maria and Yuan, Jinliang and Sundén, Bengt},
  isbn         = {9780791844823},
  keyword      = {2D,Carbon monoxide,Cell scale,Electrochemical reactions,Hydrogen,Modeling,SOFC},
  language     = {eng},
  pages        = {281--291},
  publisher    = {ARRAY(0x8472c80)},
  series       = {ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability},
  title        = {SOFC modeling at the cell scale including hydrogen and carbon monoxide as electrochemically active fuels},
  year         = {2012},
}