Abstract
The interaction of sulphurous species (present in trace amounts in hydrocarbon fuels) with anode cermets can have a drastic impact on solid oxide fuel cell (SOFC) performance. This interaction is not well understood, but there is the prospect that an improvement in its understanding will lead to ways to avoid poisoning and enable the development of superior sulphur resistant anode materials.
This work aims to advance the understanding of the interaction of sulphur with nickel based anodes by using ex situ Raman spectroscopy to study the interaction of H2S at the ppm level with gadolinium doped ceria (CGO) found in some cermet anodes. Sulphur is an excellent Raman scatterer and able to give good signal-to-noise for low levels of sulphur adsorbed on the surface of anode materials. Samples of CGO, exposed to H2S/H2 at temperatures ranging from 773K to 973K, were characterised using Raman to probe the surface state of the cermet.
This work aims to advance the understanding of the interaction of sulphur with nickel based anodes by using ex situ Raman spectroscopy to study the interaction of H2S at the ppm level with gadolinium doped ceria (CGO) found in some cermet anodes. Sulphur is an excellent Raman scatterer and able to give good signal-to-noise for low levels of sulphur adsorbed on the surface of anode materials. Samples of CGO, exposed to H2S/H2 at temperatures ranging from 773K to 973K, were characterised using Raman to probe the surface state of the cermet.
| Original language | English |
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| Title of host publication | Proceedings of the 8th Solid Oxide Fuel Cell Forum, A0713, Lucerne |
| Publication status | Published - 2008 |