SOFC Long Term Operation in Pure Methane by Gradual Internal Reforming

Georges, Samuel; Bailly, Nicolas; Steil, M.C.; Bultel, Yann; Hadjar, A.; Viricelle, Jean‐Paul; Rieu, Mathilde

doi:10.1149/05701.3023ecst

Cited by 6 publications

(8 citation statements)

References 16 publications

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“…After a mid‐term operation on cell 1 (∼2,000 h at 800 °C), careful SEM and EDX observations of the cathodic side of the fuel cell indicated that CM2 glass did not spread on the cells components during experiments at high temperature. These results were reported elsewhere 24.…”

Section: Resultssupporting

confidence: 92%

“…The use of CM2 glass in complete fuel cells and the characterization of the systems confirmed that CM2 glass was adequate for SOFC applications at 800 °C. Indeed, the OCV of the cell 1 at 800 °C after few weeks at high temperature was unchanged 24. The decrease of the operating temperature at 760 °C reduces the power density of the cell by a factor 2.…”

Section: Discussionmentioning

confidence: 96%

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Barium Borosilicate Sealing Glasses Synthesized by a Sol–Gel Process: Chemical Interactions with a Stainless Steel and Gas‐Tightness of a SOFC

et al. 2014

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Several glasses synthesized by sol–gel route and based on the BaO–B2O3–X–Al2O3–SiO2 (X = CaO, MgO) glass system have been investigated to evaluate their applicability as sealant for solid oxide fuel cell (SOFC). Chemical interactions with K41X stainless steel and hydrogen‐tightness of these materials were evaluated after operations at high temperatures over 1,000 h in air atmosphere. Formation of a new phase at the steel–glass interface and formation of porosity in the glass were observed and determined as critical problems over mid‐term operations. The role of MgO is important to obtain a gas‐tight sealing. Application of the glass paste without binder addition was performed in order to avoid possible residual porosity related problems. The best glass was finally used as sealant between anodic and cathodic compartments in complete SOFCs operated at 760 and at 800 °C. Open circuit voltages and power densities of the cells were recorded during the first hours of operation.

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Section: Resultssupporting

confidence: 92%

Section: Discussionmentioning

confidence: 96%

Barium Borosilicate Sealing Glasses Synthesized by a Sol–Gel Process: Chemical Interactions with a Stainless Steel and Gas‐Tightness of a SOFC

et al. 2014

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“…The catalytic conversion of methane into hydrogen by steam reforming over Ir-CGO catalysts was previously investigated (18). Gradual internal reforming, was already demonstrated in electrolyte supported cells using pure and dry methane (7,8,(11)(12)(13)18) and ethanol (14)(15)(16) as the fuel. The catalytic aspects towards steam reforming were also intensively described (7,8,20).…”

Section: Resultsmentioning

confidence: 99%

Effect of Catalyst Layer and Fuel Utilization on the Durability of Direct Methane SOFC

Georges¹,

Nóbrega²,

Cheah³

et al. 2015

ECS Trans.

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International audienceSolid oxide fuels cells with and without anodic catalytic layer and specific anodic current collectors were developed in order to be fueled by dry methane. Due to the cell architecture integrating a 0.1wt% Ir-CGO catalyst layer onto the anode, platinum, gold and cupper screen-printed meshes were designed and optimized to ensure efficient current collection between the anode surface and the catalyst membrane. Current density and ageing in H₂ and in pure dry CH₄ respectively were compared to conventional pressed grid collecting systems. Similar performances were achieved using bulk grids or gold, platinum and copper screen-printed meshes. Operation in pure dry methane is compared with and without the catalytic layer as a function of the fuel utilization. It is demonstrated that long term operation is possible provided that sufficient faradic efficiency is achieved

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“…Anode supported fuel cells were designed with the architecture described and studied in this paper . Specific anodic current collectors were developed to ensure a good current collection in between the Ni‐YSZ anode and the Ir‐CGO catalyst, with poor electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

Modelling of gradual internal reforming process over Ni‐YSZ SOFC anode with a catalytic layer

et al. 2014

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Methane appears to be a fuel of great interest for solid oxide fuel cell (SOFC) systems because it can be directly converted into hydrogen by Internal Reforming within the SOFC anode. To cope with carbon formation, a new SOFC cell configuration combining a catalyst layer with a classical anode was developed. The rate of the CH 4 consumption in the catalyst layer (Ir-CGO) was determined experimentally for small values of steam to carbon ratios. This paper proposes a modelling and a simulation, using the CFD-Ace software package, of the behaviour of a SOFC operated in Gradual Internal Reforming (GIR) conditions. This model of SOFC takes into account the kinetics of the steam reforming reaction in the catalyst layer in order to assess the influence of the steam to carbon ratio and the cell polarization. Because the risk of carbon formation is greater under GIR operation, a detailed thermodynamic analysis was carried out. Thermodynamic equilibrium calculations allowed us to predict the conditions of carbon formation occurrence.

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SOFC Long Term Operation in Pure Methane by Gradual Internal Reforming

Cited by 6 publications

References 16 publications

Barium Borosilicate Sealing Glasses Synthesized by a Sol–Gel Process: Chemical Interactions with a Stainless Steel and Gas‐Tightness of a SOFC

Barium Borosilicate Sealing Glasses Synthesized by a Sol–Gel Process: Chemical Interactions with a Stainless Steel and Gas‐Tightness of a SOFC

Effect of Catalyst Layer and Fuel Utilization on the Durability of Direct Methane SOFC

Modelling of gradual internal reforming process over Ni‐YSZ SOFC anode with a catalytic layer

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