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Microkinetic Modeling of Nickel Oxidation in Solid Oxide Cells: Prediction of Safe Operating Conditions

  • Oxidation of the nickel electrode is a severe aging mechanism of solid oxide fuel cells (SOFC) and solid oxide electrolyzer cells (SOEC). This work presents a modeling study of safe operating conditions with respect to nickel oxide formation. Microkinetic reaction mechanisms for thermochemical and electrochemical nickel oxidation are integrated into a 2D multiphase model of an anode‐supportedOxidation of the nickel electrode is a severe aging mechanism of solid oxide fuel cells (SOFC) and solid oxide electrolyzer cells (SOEC). This work presents a modeling study of safe operating conditions with respect to nickel oxide formation. Microkinetic reaction mechanisms for thermochemical and electrochemical nickel oxidation are integrated into a 2D multiphase model of an anode‐supported solid oxide cell. Local oxidation propensity can be separated into four regimes. Simulations show that the thermochemical pathway generally dominates the electrochemical pathway. As a consequence, as long as fuel utilization is low, cell operation considerably below electrochemical oxidation limit of 0.704 V is possible without the risk of reoxidation.show moreshow less

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Metadaten
Author:Jonathan Philipp Neidhardt, Wolfgang G. BesslerORCiDGND
Publisher:Wiley Online Library
Year of Publication:2019
Language:English
Tag:Modeling; Nickel oxidation; Numerical simulation; Solid oxide electrolyzer cell; Solid oxide fuel cell
Parent Title (Multiple languages):Chemie Ingenieur Technik
Volume:91
Issue:6
ISSN:1522-2640 E-ISSN
ISSN:0009-286X P-ISSN
First Page:843
Last Page:855
Document Type:Article (reviewed)
Institutes:Hochschule Offenburg / Bibliografie
Release Date:2020/01/13
Licence (German):License LogoEs gilt das UrhG
URL:https://onlinelibrary.wiley.com/doi/full/10.1002/cite.201800197
DOI:https://doi.org/10.1002/cite.201800197