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Christensen, Jens Ole
in Cooperation with on an Cooperation-Score of 37%
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Publications (3/3 displayed)
- 2023Performance and sulfur tolerance of a short stack with solid oxide cells using infiltrated strontium titanate based anodescitations
- 2023Low Temperature Performance and Durability of Solid Oxide Fuel Cells with Titanate Based Fuel Electrodes Using Reformate Fuelcitations
- 2021Performance of Metal Supported SOFCs Operated in HydrocarbonFuels and at Low (>650 ˚C) Temperaturescitations
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article
Performance and sulfur tolerance of a short stack with solid oxide cells using infiltrated strontium titanate based anodes
Abstract
Solid oxide fuel cell (SOFC) technology offers reliable and efficient power generation from electrochemical oxidation of fuel gasses. State-of-the-art (SoA) anodes based on Ni cermets are prone to poisoning by fuel impurities, including sulfur. Next generation anode materials should be more robust towards sulfur poisoning e.g. in the event of failure or expiry of desulfurization units utilized in SOFC systems. Herein we present the performance and sulfur tolerance of short stacks with large area electrolyte supported cells with Ni:Ce<sub>0.8</sub>Gd<sub>0.2</sub>O<sub>1.9</sub> (CGO) and FeNi:CGO co-infiltrated La<sub>0.4</sub>Sr<sub>0.4</sub>Fe<sub>0.03</sub>Ni<sub>0.03</sub>Ti<sub>0.94</sub>O<sub>3</sub> (LSFNT) anodes tested under real-life conditions using reformed grid natural gas and an upstream, bypassable desulfurization unit. The initial performance at 750 °C and 850 °C was similar to a SoA cell with Ni/CGO cermet anode for both types of infiltrate. Bypassing the desulfurization unit led to a much lower performance loss compared to SoA. Additionally, the cells with LSFNT anodes showed almost complete recovery of performance after stopping the exposure to sulfur, whereas the reference SoA cell experienced some degree of irreversible degradation. Based on the promising initial performance and tolerance towards failure of desulfurization units, LSFNT anodes infiltrated with non-noble electrocatalysts are attractive candidates for next generation SOFC systems.