Sulfur
poisoning in Ni-anode solid oxide fuel cells (SOFCs): Deactivation in single cells and a
stack
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Type
|
Journal
Article
|
|
Author
|
Davide
Papurello
|
|
Author
|
Andrea
Lanzini
|
|
URL
|
|
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Volume
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283
|
|
Pages
|
1224-1233
|
|
Publication
|
Chemical
Engineering Journal
|
|
Date
|
January
1, 2016
|
|
Abstract
|
The
most thermodynamically stable sulfur compound in the anode electrode at SOFC temperature is H2S, which dissociates on a
nickel (Ni) surface according to a chemisorption mechanism. Researchers
quantified SOFC performance losses in the presence of H2S contamination.
The deactivation process was well quantified by correlating it to Ni surface coverage by sulfur through a Temkin-like isotherm adsorption process. The detailed microscopic features of an Ni-based electrode were taken into account to quantitatively predict atomic sulfur adsorption on the Ni surface. Results revealed that, in anode-supported cells, the entire available Ni surface is affected by sulfur contamination and not just the three-phase-boundary (TPB) region. |
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