Raman spectroscopic monitoring of carbon deposition on hydrocarbon-fed solid oxide fuel cell anodes

Solid oxide fuel cells (SOFCs) are potentially the most efficient and cost-effective solution for the utilization of a wide variety of fuels beyond hydrogen. One of the chief obstacles to true fuel flexibility lies in anode deactivation by coking as well as a limited mechanistic understanding of cok...

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Published inEnergy & environmental science Vol. 5; no. 7; pp. 7913 - 7917
Main Authors Blinn, Kevin S, Abernathy, Harry, Li, Xiaxi, Liu, Mingfei, Bottomley, Lawrence A, Liu, Meilin
Format Journal Article
LanguageEnglish
Published 01.01.2012
Subjects
Anodes
Carbon
Coking
Deposition
Fuels
Solid oxide fuel cells
Spectroscopy
Temperature
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Summary:Solid oxide fuel cells (SOFCs) are potentially the most efficient and cost-effective solution for the utilization of a wide variety of fuels beyond hydrogen. One of the chief obstacles to true fuel flexibility lies in anode deactivation by coking as well as a limited mechanistic understanding of coking and its prevention. Here we report Raman spectroscopic mappingand monitoringof carbon deposition on SOFC anode surfaces under both ex situand in situconditions. Carbon mapping was successfully demonstrated with a model Ni-YSZ electrode exposed to a CH sub(4)-containing atmosphere at high temperature (625 degree C), while carbon deposition over time in a wet C sub(3)H sub(8) atmosphere was directly monitored on a similar anode system as well as a BaO-modified system. This spectroscopic technique provides valuable insight into the mechanism of carbon deposition, which is vital in achieving rational design of carbon-tolerant anode materials.
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ISSN:1754-5692
1754-5706
DOI:10.1039/c2ee21499g