Porous Sr2MgMo1−xVxO6−d ceramics as anode materials for SOFCs using biogas fuel

Wang, Fengyun; Guobin, Zhong; Luo, Shijun; Xia, Lisha; Fang, Li-Hsing; Song, Xuegang; Hao, Xihong; Yan, Gang

doi:10.1016/j.catcom.2015.04.019

Cited by 17 publications

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References 13 publications

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“…electrochemical studies, made on Sr 2 MgMo 0.8 Nb 0.2 O 6−δ (10) in methane atmosphere, revealed that this oxide is active for CO, CO 2 or C adsorption. Moreover, partial substitutions of Mo by V (11) in Sr 2 MgMo 0.95 V 0.05 O 6−δ improved the catalytic activity and a stronger H 2 S-tolerance in respect to Sr 2 MgMoO 6−δ is obtained. Furthermore, it was observed that the V-doped compounds are more stable in methane than non-doped-samples.…”

Section: Introductionmentioning

confidence: 92%

Study of Sr₂MgMo_0.9Ni_0.1O_6-δas SOFC Anode

et al. 2017

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Sr 2 MgMo 0.9 Ni 0.1 O 6-δ (SMMNi) double perovskite was synthesized by the combustion-solution method followed by annealing in air at 1100ºC for 12 hours. Sr 2 MgMoO 6-δ (SMMO) compound was also tested for comparison. X-Ray Diffraction (XRD) patterns indicate that SMMO and SMMNi powders display triclinic symmetry. Thermogravimetric studies show that Mo-substitution by Ni in SMMO decreases the oxygen content in air condition. Meanwhile, after calcination in diluted-H 2 both compounds show oxygen nonstoichiometric change ∆δ ≈ 0.06. EIS measurements on symmetrical SMMO/GDC/SMMO and SMMNi/GDC/SMMNi cells were performed in order to study the influence of time and environment conditions (H 2 -content) on the anode polarization resistance (R pa ).

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Section: Introductionmentioning

confidence: 92%

Study of Sr₂MgMo_0.9Ni_0.1O_6-δas SOFC Anode

et al. 2017

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“…Basically it consists of 50-70% CH 4 , 25-50% CO 2 , 1-5% H 2 and 0.3-3% N 2 , with various impurities, notably, NH 3 , H 2 S and halides [2,3].Theoretically, biogas can be used to generate power high efficiently (60-90%) and cleanly by means of SOFCs. But, presently, the direct use of biogas as the fuel for SOFCs is still limited due to the H 2 S contamination on the anode [4,5].…”

Section: Introductionmentioning

confidence: 99%

Performance of Ceria-electrolyte Solid Oxide Fuel Cell Using Simulated Biogas Mixtures as Fuel

Escudero¹,

Fuerte²

2017

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In this study, a samarium cerium electrolyte-supported solid oxide fuel cell (SOFC) was assembled with Ce 0.8 Sm 0.2 O 2−δ (SDC) electrolyte, La 0.58 Sr 0.4 Fe 0.8 Co 0.2 O 3-δ (LSCF) as cathode and WNi-Ce as anode. A porous layer of SDC between anode and electrolyte was used to improve adhesion of the anode ink. The cell performance was investigated with hydrogen and three simulated biogas mixtures (CH 4 /CO 2 /H 2 70/25/5, 60/35/5 and 50/45/5) on the anode and static air on the cathode at 750ºC. In addition, the effect of H 2 S (10ppm) incorporation in the biogas on the cell performance has been examined. The electrochemical behavior of the cell has been evaluated using IV curves, impedance spectroscopy and load demands. The results revealed that the best performance was obtained with the biogas composition richer in CH 4 due to probably the higher catalytic activity of WNi-Ce in this operation condition. Furthermore, the addition of H 2 S in biogas causes an important decrease on the cell performance owing to the sulphuration reactions of anodic material. However, the stability tests under load demands revealed that the cell does not suffer degradation under any studied operation conditions (biogas composition and H 2 S in the fuel). This suggests that WNi-Ce could be a suitable anode material for ceria-electrolyte SOFC direct feeding of biogas.

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