Reversible Operation using Carbonaceous Gasses of a 30-cell Solid Oxide Cell Stack

Jensen, S. H. (Guest lecturer), Langnickel, H. (Guest lecturer), Nils Hintzen (Other), Chen, M. (Guest lecturer), Sun, X. (Guest lecturer), Hauch, A. (Guest lecturer), Butera, G. (Guest lecturer), Clausen, L. R. (Guest lecturer)

Activity: Talks and presentationsConference presentations

Description

Recent theoretical studies show that reversible
electrochemical conversion of H2O and CO2 to CH4 inside novel
pressurized solid oxide cells (SOCs) combined with subsurface
storage of the produced gasses can facilitate seasonal electricity
storage with a round-trip efficiency 70-80% and a storage cost
below 3 ¢/kWh. Here we show test results from a 30-cell SOC
stack operated with carbonaceous gasses at 18.7 bar at 700 °C in
both electrolysis and fuel cell mode. The GC data from the
electrolysis test results show 18% methane in the dry outlet gas,
i.e. substantial methane formation inside the SOC stack. Further
we observed degradation rates comparable to that of ambient
pressure operation with H2/H2O gas mixtures.
Period12 Dec 2017 - 15 Dec 2017
Held at7th European Fuel Cell Piero Lunghi Conference
Event typeConference
LocationNaples, Italy

Keywords

  • SOC
  • Pressure
  • Effiency
  • Storage