Carbon deposition is one of the operational problems in hydrocarbon fueled solid oxide fuel cells (SOFCs). Using electrochemical impedance spectroscopy (EIS), experiments are performed to detect carbon formation on button-type cermet Ni-YSZ/YSZ/LSM SOFCs. A mass spectrometer (MS) is used to monitor the outlet gas composition, and the distribution of relaxation times (DRT) is computed to analyse the measured impedance. This work presents preliminary results obtained for H2CH4 mixtures at OCV and 800oC, showing an increase in the mid-frequency range (10-3 and 10-2 s) for methane concentrations exceeding 10 vol%.
|Publication status||Published - 2019|
|Event||SOFC 2019: 16th International Symposium on Solid Oxide Fuel Cells - Kyoto, Japan|
Duration: 8 Sep 2019 → 13 Sep 2019