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Characterisation of sulphur poisoning of anodes in single-cell SOFC stacks using impedance spectroscopy

Untersuchung der Schwefelvergiftung der Anoden in einzelligen Festoxidbrennstoffzellenstapeln mittels Impedanzspektrometrie
 
: Kavurucu Schubert, S.; Kusnezoff, M.; Wunderlich, C.

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Fulltext urn:nbn:de:0011-n-831982 (384 KByte PDF)
MD5 Fingerprint: 8b4abb47fa3a741f265d9c9e7044911b
Created on: 01.07.2009


European Fuel Cell Forum -EFCF-:
8th European SOFC Forum. CD-ROM : European Solid Oxide Fuel Cell Forum, held at Lucerne Fuel Cell Forum 2008, international fuel cell conference with exhibition. 30 June - 4 July 2008, Kultur- und Kongresszentrum Luzern, Lucerne/Switzerland
Oberrohrdorf, 2008
12 pp.
European Solid Oxide Fuel Cell Forum (SOFC) <8, 2008, Lucerne>
Lucerne Fuel Cell Forum <2008, Lucerne>
English
Conference Paper, Electronic Publication
Fraunhofer IKTS ()
Festoxidbrennstoffzelle; Impedanzspektrometrie; Vergiftung; Schwefel; Anode; Degradation

Abstract
The effect of H2S on single cell stack power using simulated syngas and hydrogen/steam mixture as a fuel is investigated using impedance spectroscopy. The different concentrations of H2S (2-50 ppm) were added to the pre-mixed reformate containing H2, CO, CO2, H2O, CH4 and N2 during cell operation. Electrolyte supported cells are tested at operation temperature of 850°C. The effect of different concentrations of H2S and steam on sulphur tolerance of cells is investigated. The impedance measurements are carried out to identify the processes which take place in the anode. The reversibility of sulphur poisoning is investigated and the observed regeneration processes are discussed. X-ray diffractometer (XRD) was used to characterize the microstructural changes that occurred after H2S poisoning.

: http://publica.fraunhofer.de/documents/N-83198.html