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Syngas Production Via High-Temperature Co-Electrolysis of Steam and Carbon Dioxide in a Solid-Oxide Stack.


DE2007912908

Publication Date 2007
Personal Author Stoots, C. M.; O'Brien, J. E.; Hartvigsen, J. J.
Page Count 9
Abstract An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 850oC in the coelectrolysis mode, simultaneously electrolyzing steam and carbon dioxide for the direct production of syngas. The experiments were performed over a range of inlet flow rates of steam, carbon dioxide, hydrogen and nitrogen and over a range of current densities (-0.1 to 0.25 A/cm2) using single electrolyte-supported button electrolysis cells. Steam and carbon dioxide consumption rates associated with electrolysis were measured directly using inlet and outlet dewpoint instrumentation and a gas chromatograph, respectively. Cell operating potentials and cell current were varied using a programmable power supply. Measured values of open-cell potential and outlet gas composition are compared to predictions obtained from a chemical equilibrium coelectrolysis model. Model predictions of outlet gas composition based on an effective equilibrium temperature are shown to agree well with measurements. Area-specific resistance values were similar for steam electrolysis and coelectrolysis.
Keywords
  • Hydrogen production
  • Carbon dioxide
  • High temperature
  • Solid electrolyte fuel cells
  • Electrolysis
  • Fuel cells
  • Steam
  • Syngas
  • Synthetic fuels
  • Flow rates
Source Agency
  • Technical Information Center Oak Ridge Tennessee
Corporate Authors Idaho National, Idaho Falls.; Department of Energy, Washington, DC.
Supplemental Notes Sponsored by Department of Energy, Washington, DC.
Document Type Technical Report
NTIS Issue Number 200801
Syngas Production Via High-Temperature Co-Electrolysis of Steam and Carbon Dioxide in a Solid-Oxide Stack.
Syngas Production Via High-Temperature Co-Electrolysis of Steam and Carbon Dioxide in a Solid-Oxide Stack.
DE2007912908

  • Hydrogen production
  • Carbon dioxide
  • High temperature
  • Solid electrolyte fuel cells
  • Electrolysis
  • Fuel cells
  • Steam
  • Syngas
  • Synthetic fuels
  • Flow rates
  • Technical Information Center Oak Ridge Tennessee
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