Sulfur Tolerance of Solid Oxide Fuel Cells

Sasaki, Kazunari; Susuki, K.; Iyoshi, A.; Uchimura, M.; Imamura, N; Kusaba, Hajime; Teraoka, Yasutake; Fuchino, H.; Tsujimoto, K.; Uchida, Y.; Jingo, N.

doi:10.1149/200507.1267pv

Cited by 5 publications

(3 citation statements)

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“…The anode potential was measured as the voltage between the (working) anode and the Pt reference electrode on the cathode side. An initial cell voltage drop followed by a quasi steady-state cell voltage can be observed, as previously reported, associated mainly with an increase in anodic overpotential [1,2] and almost constant ohmic (IR) loss, even up to 3000 hours. Cell degradation rate with 5 ppm H 2 S was 0.68 %/1000h and it was slightly higher than the value without H 2 S of 0.3 %/1000h.…”

Section: Resultssupporting

confidence: 83%

“…However, as shown in Fig. 1, various types of minor constituents in practical fuels and/or from the system components can cause chemical degradation of SOFCs [1][2][3][4], such as anode and cathode poisoning phenomena. Practical fuels may contain small amount of sulfur-compounds, Cl 2 , NH 3 , and Si-compounds, and ambient air to the cathodes also contains various minor impurities.…”

Section: Introductionmentioning

confidence: 99%

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Impurity Poisoning of SOFCs

Sasaki,

Haga,

Yoshizumi

et al. 2011

Meet. Abstr.

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Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Impurity Poisoning of SOFCs

Sasaki,

Haga,

Yoshizumi

et al. 2011

Meet. Abstr.

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“…This approach is usually used in the related literature such as [7,17,18]. When starting the H 2 S exposure at OCV, the cell voltage dropped sharply and reached afterwards a constant level.…”

Section: Resultsmentioning

confidence: 99%

Durability of solid oxide fuel cells using sulfur containing fuels

Hagen

Rasmussen

Thydén

2011

Journal of Power Sources

120

123

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Sulfur Poisoning and Regeneration of Ni-Based Anodes in Solid Oxide Fuel Cells

Zha

Cheng

Liu

2007

J. Electrochem. Soc.

263

270

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The effect of hydrogen sulfide ͑H 2 S͒ on the performance of nickel/yttria-stabilized zirconia ͑YSZ͒ cermet anode for solid oxide fuel cells has been studied under various operating conditions. In all cases, a small amount of H 2 S ͑ppm level͒ causes a sharp drop in cell performance within the first few minutes of exposure, followed by a gradual but persistent deterioration in performance for several days. The extent of anode degradation caused by sulfur poisoning increases with increasing H 2 S concentration, increasing cell voltage ͑i.e., closer to open-circuit voltage or decreasing cell current density͒, or decreasing cell operating temperature. The initial sharp degradation in performance is attributed to rapid adsorption of sulfur onto the Ni surface, which blocks the active sites for hydrogen adsorption and oxidation. However, the mechanism for the subsequent slow degradation is still not clear. Upon removal of H 2 S from the fuel stream, the anode performance can be recovered fully or partially, depending on operating conditions and duration of H 2 S exposure. The rate of the recovery process increases with operating temperature and cell current density.

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Sulfur Tolerance of Solid Oxide Fuel Cells

Cited by 5 publications

References 0 publications

Impurity Poisoning of SOFCs

Impurity Poisoning of SOFCs

Durability of solid oxide fuel cells using sulfur containing fuels

Sulfur Poisoning and Regeneration of Ni-Based Anodes in Solid Oxide Fuel Cells

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