| Autor: |
McIntyre, Melissa D., Neuburger, Daniel M., Walker, Robert A |
| Zdroj: |
ECS Transactions; July 2015, Vol. 66 Issue: 32 p11-19, 9p |
| Abstrakt: |
The addition of steam to carbon containing fuels is a common method for minimizing carbon accumulation on anodes in solid oxide fuel cells (SOFCs). Experiments presented in this work utilize in situ Raman spectroscopy coupled with voltammetry measurements to examine the extent of carbon accumulation on Ni-based anodes of electrolyte supported SOFCs exposed to dry and humidified fuels (methane, propane, and n-hexane) at 700 @C. Vibrational Raman spectra show that highly ordered graphite forms on anodes exposed to methane and propane while more disordered graphite forms during exposure to hexane. The carbon structure was unaffected when steam was added to the fuel although the amount of carbon accumulation was suppressed for humidified methane as inferred from relative vibrational band intensities. Electrochemical data show rapidly diminishing performance and continued cell degradation for anodes exposed to propane and hexane compared to experiments performed with methane. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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