A Three-Dimensional Time-Dependent Model of the Degradation Caused by Chromium Poisoning in a Solid Oxide Fuel Cell Stack

Shangzhe Yu, Dominik Schäfer, Shidong Zhang (), Roland Peters, Felix Kunz and Rüdiger-A. Eichel
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Shangzhe Yu: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Dominik Schäfer: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Shidong Zhang: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Roland Peters: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Felix Kunz: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Rüdiger-A. Eichel: Institute of Energy and Climate Research, Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany

Energies, 2023, vol. 16, issue 23, 1-23

Abstract: Chromium poisoning strongly influences the performance of solid oxide fuel cell (SOFC) stacks. A novel numerical model is introduced by incorporating the chemical and electrochemical aspects of chromium poisoning. It offers a detailed analysis of the spatial distribution of critical chromium-based species, including SrCrO 4 and Cr 2 O 3 . This model is integrated with a pre-existing three-dimensional, time-dependent computational fluid dynamics (CFD) toolbox, openFuelCell2. The numerical simulations indicate a quantitative agreement with experimental data over an extended 100 kh operation. Numerical simulations are conducted within a representative channel geometry originating from an F10 SOFC stack at Forschungszentrum Jülich GmbH, and consider a wide range of stack designs, temperatures, and air absolute humidities. The simulation results demonstrate the potential of a protective coating produced through atmospheric plasma spraying (APS) technology in nearly eliminating chromium poisoning. It is also found that the APS protective coating could enable the operation of an SOFC stack with low requirements of air dehumidification at a temperature of 650 ∘ C.

Keywords: time-dependent simulation; OpenFOAM; chromium poisoning; solid oxide fuel cell stack (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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