Experimental Investigation of Electrochemical Reactions along SOFCs for Internal and External Reformed Methane

M. Höber, B. Königshofer, G. Pongratz, P. Boškoski, G. Nusev, C. Hochenauer, V. Subotic

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

Modern societies require a reliable and sustainable energy supply, which can be achieved by solid oxide fuel cells (SOFCs). SOFCs run with a variety of fuels such as methane containing reformates. It is possible to utilize methane directly in SOFCs, but it can cause degradation of the fuel cells anode. However, irreversible degradation can be prevented, when identifying degradation mechanisms at an early stage by online monitoring tools. We used electrochemical impedance spectroscopy and its advanced tool distribution of relaxation times (DRT) method. The operating conditions were varied in order to determine the relevant system behavior as a response to the corresponding methane utilization processes. The tested electrolyte supported cells have an active area of 81cm2 and are tested under different reforming conditions. The holistic approach of this work combines thermal, electrical, electrochemical measurement methods and gas analysis to show the influence of methane utilization on the DRT spectra.

Original languageEnglish
Title of host publication17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021
PublisherIOP Publishing Ltd.
Pages2017-2031
Number of pages15
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2021
Event17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021 - Stockholm, Sweden
Duration: 18 Jul 202123 Jul 2021

Publication series

NameECS Transactions
Number1
Volume103
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021
Country/TerritorySweden
CityStockholm
Period18/07/2123/07/21

ASJC Scopus subject areas

  • Engineering(all)

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