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SOFC Modeling at the Cell Scale including Hydorgen and Carbon Monoxide as Electrochemically Active Fuels

Andersson, Martin LU ; Navasa, Maria LU ; Yuan, Jinliang LU and Sundén, Bengt LU (2012) ASME 2012 Tenth International Fuel Cell Science, Engineering, and Technology Conference FuelCell2012 In ASME FuelCell 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... (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. (Less)
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
SOFC, Modeling, Electrochemical reactions, Hydrogen, Carbon monoxide, Cell scale, 2D
in
ASME FuelCell
pages
281 - 291
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME 2012 Tenth International Fuel Cell Science, Engineering, and Technology Conference FuelCell2012
external identifiers
  • wos:000325037500033
  • other:ESFuelCell2012-91112
language
English
LU publication?
yes
id
ea278e13-6e16-40e7-8720-3c0dc8d1d970 (old id 3130528)
date added to LUP
2012-10-18 08:27:11
date last changed
2016-04-16 09:13:11
@inproceedings{ea278e13-6e16-40e7-8720-3c0dc8d1d970,
  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. <br/><br>
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.},
  author       = {Andersson, Martin and Navasa, Maria and Yuan, Jinliang and Sundén, Bengt},
  booktitle    = {ASME FuelCell},
  keyword      = {SOFC,Modeling,Electrochemical reactions,Hydrogen,Carbon monoxide,Cell scale,2D},
  language     = {eng},
  pages        = {281--291},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {SOFC Modeling at the Cell Scale including Hydorgen and Carbon Monoxide as Electrochemically Active Fuels},
  year         = {2012},
}