Pressurized reversible operation of a 30-cell solid oxide cell stack using carbonaceous gases

Søren Højgaard Jensen, Hendrik Langnickel, N. Hintzen, Ming Chen, Xiufu Sun, Anne Hauch, Giacomo Butera, Lasse Røngaard Clausen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

Recent theoretical studies show that reversible electrochemical conversion of H2O and CO2 to CH4 inside pressurized solid oxide cells (SOCs) combined with subsurface storage of the produced gases can facilitate seasonal electricity storage with a round-trip efficiency reaching 70-80% and a storage cost below 3 ¢/kWh. Here we show test results with a 30-cell SOFCMAN 301 stack operated with carbonaceous gases at 18.7 bar and 700 ˚C in both electrolysis and fuel cell mode. The CH4 content in the stack outlet gas increased from 0.22% at open circuit voltage (OCV) to 18% at -0.17 A cm-2 in electrolysis mode. The degradation rates in both fuel cell and electrolysis mode were comparable to previously reported SOFCMAN stack degradation rates measured at ambient pressure operation with H2/H2O gas mixtures.
Original languageEnglish
Title of host publicationProceedings of the 7th European Fuel Cell Technology & Applications Conference ( EFC2017)
EditorsViviana Cigolotti
PublisherENEA
Publication date2017
Pages413-414
Article numberEFC17255 EFC17
ISBN (Print)978-88-8286-324-1
Publication statusPublished - 2017
Event7th European Fuel Cell Technology & Applications Conference (EFC2017) - Naples, Italy
Duration: 12 Dec 201715 Dec 2017
Conference number: 7
http://www.europeanfuelcell.it/
http://www.europeanfuelcell.it/index.html

Conference

Conference7th European Fuel Cell Technology & Applications Conference (EFC2017)
Number7
Country/TerritoryItaly
CityNaples
Period12/12/201715/12/2017
Internet address

Keywords

  • Pressure
  • Internal
  • Methane
  • Efficiency
  • Storage

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