D. J. Green—contributing editor
Thermodynamics and Kinetics of the Interaction of Carbon and Sulfur with Solid Oxide fuel Cell Anodes
Article first published online: 30 MAR 2009
© 2009 The American Ceramic Society
Journal of the American Ceramic Society
Volume 92, Issue 4, pages 763–780, April 2009
How to Cite
Offer, G. J., Mermelstein, J., Brightman, E. and Brandon, N. P. (2009), Thermodynamics and Kinetics of the Interaction of Carbon and Sulfur with Solid Oxide fuel Cell Anodes. Journal of the American Ceramic Society, 92: 763–780. doi: 10.1111/j.1551-2916.2009.02980.x
- Issue published online: 9 APR 2009
- Article first published online: 30 MAR 2009
- Manuscript No. 25410. Received October 28, 2008; approved January 7, 2009.
Fuel cells are likely to play a key role in any low-carbon economy. Solid oxide fuel cells (SOFCs) are currently capable of sustained and continuous operation on high-purity fuels, but they must demonstrate that they can overcome a number of challenges before they are commercially viable on a large scale. Fuels such as natural gas, and those derived from renewable sources such as gasified biomass, contain many contaminants, typically sulfur- and carbon-containing compounds. To address this it will be necessary to improve our understanding of failure modes in operating SOFCs, and act on this to reduce degradation rates. A combination of techniques will be needed to develop a rigorous approach to understanding and mitigating degradation. The intent of this article is to present a synopsis of the current state of the art in our understanding of the effect of carbon and sulfur on SOFC anodes. Emphasis is placed on the comparison between thermodynamic and kinetic models, and experimental validation of these. In particular the applicability of thermodynamic models to the study of such contaminants is questioned. Additionally the uses of multiscale kinetic models capable of predicting transient conditions are reviewed alongside recent analytical techniques necessary for their validation.