Durability of anode supported Solid Oxides Fuel Cells (SOFC) under direct dry-reforming of methane
By Lanzini, A.; Leone, P.; Guerra, C.; Smeacetto, F.; Brandon, N.P. & Santarelli, M.
Published in Chemical Engineering Journal
NULL
2013
Abstract
The present work investigates the performance and degradation mechanisms of a Ni-based anode supported Solid Oxides Fuel Cells (SOFC) operating at ∼800 °C on direct internal reforming of dry CH4–CO2 mixtures. The catalytic properties of the anode support were first studied in a micro-reactor configuration to determine safe conditions (i.e., without carbon formation) under which a dry conversion of the methane can occur directly within the fuel cell. A full electrochemical characterization of complete cells followed to preliminarily assess their resistance towards carbon formation when operating on direct dry-reforming. Ageing tests of ∼300 h each have been performed in galvanostatic mode, with impedance spectra taken every 50 h of continuous operation to monitor the trend over the time of the different polarization contributions. Post-mortem microstructural analysis was carried out after each experiment to verify the morphology and nucleation of carbon deposited in the anode electrode.
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