Ce0.9Sr0.1Cr0.5Fe0.5O3−δ as the anode materials for solid oxide fuel cells running on H2 and H2S

Zhu, Xiuling; Han, Yan; Zhong, Qin; Zhao, Xuejun; Winie, Tan

doi:10.1016/j.jallcom.2011.03.124

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…So far there is no study reported on the effect of H 2 S on the ceramic–carbonate dual phase membranes. However, the H 2 S effects on solid oxide fuel cell (SOFC) materials were investigated by some research groups. ,− The structures and electrochemical properties of some SOFC materials changed after exposure to H 2 S-containing gas. , Thus, it is possible that exposure of H 2 S-containing gas may have a negative effect on the CO 2 permeation of ceramic–carbonate membranes because the materials for their ceramic phase are similar to those used in SOFCs. The present work is focused on investigating and understanding the effect of H 2 S on CO 2 permeation of Ce 0.8 Sm 0 0.2 O 2−δ (SDC)–carbonate dual-phase membranes.…”

Section: Introductionmentioning

confidence: 99%

Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Chen

et al. 2017

Ind. Eng. Chem. Res.

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CO 2 -permselective ceramic−carbonate dualphase membranes offer potential for uses in separators or membrane reactors for conversion of coal derived syngas to hydrogen with CO 2 capture. Coal derived syngas contains H 2 S, but the effect of H 2 S on permeation properties of these dualphase membranes was unclear. This study examines the stability of Ce 0.8 Sm 0.2 O 1.9 (SDC)−Li 2 CO 3 /Na 2 CO 3 membrane in H 2 S-containing gas. CO 2 permeation flux of the SDC−carbonate membrane is stable in a H 2 /N 2 /CO 2 mixture gas, but it decreases after the introduction of H 2 S. The extent of the CO 2 permeation flux reduction increases with H 2 S concentration in the feed gas and run time. Exposure to H 2 S results in appearance of a tree-branch-like structure near the feed side of the SDC−carbonate membrane, and formation of Ce 2 O 2 S on the SDC phase. Such an exposure has negligible effect on the carbonate phase. The formation of Ce 2 O 2 S lowers the oxygen ionic conductivity of the SDC phase, reducing the CO 2 permeance for the dual-phase membrane.

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Section: Introductionmentioning

confidence: 99%

Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Chen

et al. 2017

Ind. Eng. Chem. Res.

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“…Perovskites are one class of materials that are resistant to the drawbacks experienced by Ni-YSZ. Among the many perovskites that have been studied as alternatives to Ni-based anodes [8][9][10][11][12], LaCrO 3 -based materials, belonging to the ABO 3 perovskite family, have shown particular promise owing to their mixed ionic/electronic conductivity and good stability over a wide range of oxygen partial pressures [13,14]. This compound's simple perovskite crystal structure allows for relative ease of substitution at the A-and B-sites modifying the conductivity and stability properties.…”

Section: Introductionmentioning

confidence: 99%

Redox and phase behavior of Pd-substituted (La,Sr)CrO3 perovskite solid oxide fuel cell anodes

et al. 2016

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The use of palladium and strontium in LaCrO 3 perovskites for solid oxide fuel cell anodes is known to lead to improved performance, in part due to the formation of palladium at the surface under reducing conditions that can act as a catalyst, with regeneration of the catalyst possible by cycling between oxidizing and reducing conditions. Whether this cycling involves dissolution and exsolution of the palladium into the perovskite is unclear. We describe a detailed analysis of the perovskites La 0.8 Sr 0.2 Cr 1-x Pd x O 3-δ (LSCrPd, nominal stoichiometry x = 0.1 and 0.2) under reducing and oxidizing conditions. A LSCrPd perovskite was found to be the main phase, further confirmed by transmission electron microscopy. Secondary phases including metallic Pd, PdO, and La 4 PdO 7 , as well as SrCrO 4 , were also present. Some phases, such as PdO, SrCrO 4 , and La 4 PdO 7 , were no longer present following reduction while other phases such as metallic Pd and La 2 O 3 , were found in increasing amounts. When used as active solid oxide fuel cell anode layers both with and without Gd 0.1 Ce 0.9 O 2-β (GDC) in La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3-ε / La 0.4 Ce 0.6 O 2 electrolyte-supported cells, SOFCs with anodes containing GDC and higher amounts of Pd demonstrated higher maximum power densities and lower anode polarization resistances compared to cells with GDC-free, lower Pd content anodes. While the Pd is important to improve the anode performance, the results indicate that cycling does not lead to simple dissolution/exsolution into the perovskite, instead many other phases are present while a limited amount of Pd was actually observed in the perovskite.

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Synthesis and performance of Sm0.9Sr0.1Cr0.5Fe0.5O3 as anode material for SOFCs running on H2S-containing fuel

Zhu

et al. 2012

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Ce0.9Sr0.1Cr0.5Fe0.5O3−δ as the anode materials for solid oxide fuel cells running on H2 and H2S

Cited by 9 publications

References 28 publications

Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Redox and phase behavior of Pd-substituted (La,Sr)CrO3 perovskite solid oxide fuel cell anodes

Synthesis and performance of Sm0.9Sr0.1Cr0.5Fe0.5O3 as anode material for SOFCs running on H2S-containing fuel

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Ce0.9Sr0.1Cr0.5Fe0.5O3−δ as the anode materials for solid oxide fuel cells running on H2 and H2S

Cited by 9 publications

References 28 publications

Poisoning Effect of H2S on CO2 Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Poisoning Effect of H2S on CO2 Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Redox and phase behavior of Pd-substituted (La,Sr)CrO3 perovskite solid oxide fuel cell anodes

Synthesis and performance of Sm0.9Sr0.1Cr0.5Fe0.5O3 as anode material for SOFCs running on H2S-containing fuel

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Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane

Poisoning Effect of H₂S on CO₂ Permeation of Samarium-Doped-Ceria/Carbonate Dual-Phase Membrane