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SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants

Andersson, Martin LU ; Yuan, Jinliang LU and Sundén, Bengt LU (2013) In Journal of Power Sources 232. p.42-54
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, in two-dimensions, is developed to describe a solid oxide fuel cell (SOFC). Governing equations for, gas-phase species, heat momentum, ion and electron transport are implemented and coupled to kinetics describing electrochemical and internal reforming reactions. Both carbon monoxide and hydrogen are considered as electrochemical reactants within the anode. The predicted results show that the current density distribution along the main flow direction depends on the local concentrations and temperature. A higher (local) fraction... (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, in two-dimensions, is developed to describe a solid oxide fuel cell (SOFC). Governing equations for, gas-phase species, heat momentum, ion and electron transport are implemented and coupled to kinetics describing electrochemical and internal reforming reactions. Both carbon monoxide and hydrogen are considered as electrochemical reactants within the anode. The predicted results show that the current density distribution along the main flow direction depends on the local concentrations and temperature. A higher (local) fraction of electrochemical reactants increases the Nernst potential as well as the current density. For fuel mixtures without methane, the cathode air flow rate needs to be increased significantly to avoid high temperature gradients within the cell as well as a high outlet temperature. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SOFC, Modeling, Hydrogen, Carbon monoxide, Electrochemical reaction mechanisms, Transport processes
in
Journal of Power Sources
volume
232
pages
42 - 54
publisher
Elsevier
external identifiers
  • wos:000318752800008
  • scopus:84873864300
ISSN
1873-2755
DOI
10.1016/j.jpowsour.2012.12.122
language
English
LU publication?
yes
id
d02799ba-22ea-4e59-b2ce-203651070916 (old id 3436913)
date added to LUP
2013-01-31 10:35:03
date last changed
2019-02-17 03:26:45
@article{d02799ba-22ea-4e59-b2ce-203651070916,
  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, in two-dimensions, is developed to describe a solid oxide fuel cell (SOFC). Governing equations for, gas-phase species, heat momentum, ion and electron transport are implemented and coupled to kinetics describing electrochemical and internal reforming reactions. Both carbon monoxide and hydrogen are considered as electrochemical reactants within the anode. The predicted results show that the current density distribution along the main flow direction depends on the local concentrations and temperature. A higher (local) fraction of electrochemical reactants increases the Nernst potential as well as the current density. For fuel mixtures without methane, the cathode air flow rate needs to be increased significantly to avoid high temperature gradients within the cell as well as a high outlet temperature.},
  author       = {Andersson, Martin and Yuan, Jinliang and Sundén, Bengt},
  issn         = {1873-2755},
  keyword      = {SOFC,Modeling,Hydrogen,Carbon monoxide,Electrochemical reaction mechanisms,Transport processes},
  language     = {eng},
  pages        = {42--54},
  publisher    = {Elsevier},
  series       = {Journal of Power Sources},
  title        = {SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants},
  url          = {http://dx.doi.org/10.1016/j.jpowsour.2012.12.122},
  volume       = {232},
  year         = {2013},
}