Effect of Catalyst Layer and Fuel Utilization on the Durability of Direct Methane SOFC

Samuel Georges (1) , Shayenne. D. Nóbrega (1) , Seng Kian Cheah (2) , M.C. Steil (1) , Yann Bultel (1) , Mathilde Rieu (3, 4, 5) , Jean-Paul Viricelle (3, 4, 5) , Patrick Gelin (2)

1 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces
2 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
5 PRESSIC-ENSMSE - Procédés et REactivité des Systèmes Solide-gaz, Instrumentation et Capteurs

Solid oxide fuels cells with and without anodic catalytic layer and specific anodic current collectors were developed in order to be fueled by dry methane. Due to the cell architecture integrating a 0.1wt% Ir-CGO catalyst layer onto the anode, platinum, gold and cupper screen-printed meshes were designed and optimized to ensure efficient current collection between the anode surface and the catalyst membrane. Current density and ageing in H₂ and in pure dry CH₄ respectively were compared to conventional pressed grid collecting systems. Similar performances were achieved using bulk grids or gold, platinum and copper screen-printed meshes. Operation in pure dry methane is compared with and without the catalytic layer as a function of the fuel utilization. It is demonstrated that long term operation is possible provided that sufficient faradic efficiency is achieved.

Mots clés: SOFC; catalyst; anode

Domaines: Génie des procédés

Samuel Georges, Shayenne. D. Nóbrega, Seng Kian Cheah, M.C. Steil, Yann Bultel, et al.. Effect of Catalyst Layer and Fuel Utilization on the Durability of Direct Methane SOFC. 228th Electrochemical Society Meeting, Oct 2015, Phoenix, AZ United States. pp.51-59, ⟨10.1149/06916.0051ecst⟩. ⟨hal-01340245⟩