Closed-form formulation of the thermodynamically consistent electrochemical model considering electrochemical co-oxidation of CO and H$_2$ for simulating solid oxide fuel cells

Kravos, Andraž (author), Katrašnik, Tomaž (author)

Achieving efficient solid oxide fuel cell operation and simultaneous prevention of degradation effects calls for the development of precise on-line monitoring and control tools based on predictive, computationally fast models. The originality of the proposed modelling approach originates from the hypothesis that the innovative derivation procedure enables the development of a thermodynamically consistent multi-species electrochemical model that considers the electrochemical co-oxidation of carbon monoxide and hydrogen in a closed-form. The latter is achieved by coupling the equations for anodic reaction rates with the equation for anodic potential. Furthermore, the newly derived model is capable of accommodating the diffusive transport of gaseous species through the gas diffusion layer, yielding a computationally efficient quasi-one-dimensional model. This resolves a persistent knowledge gap, as the proposed modelling approach enables the modelling of multi-species fuels in a closed form, resulting in very high computational efficiency, and thus enable the model’s real-time capability. Multiple validation steps against polarisation curves with different fuel mixtures confirm the capability of the newly developed model to replicate experimental data. Furthermore, the presented results confirm the capability of the model to accurately simulate outside the calibrated variation space under different operating conditions and reformate mixtures. These functionalities position the proposed model as a beyond state-of-the-art tool for model supported development and control applications.

• Language: English
• Keywords: solid oxide fuel cell, electrochemical model, reduced dimensionality model, closed-form solution, electrochemical co-oxidation, carbon monoxide, hydrogen
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 24 str.
• Numbering: Vol. 12, iss. 1, art. 56
• PID: 20.500.12556/RUL-134350
• UDC: 662:621.352.6
• ISSN on article: 2073-4344
• DOI: 10.3390/catal12010056
• COBISS.SI-ID: 92358147
• Publication date in RUL: 10.01.2022

Record is a part of a journal

• Title: Catalysts
• Shortened title: Catalysts
• Publisher: MDPI AG
• ISSN: 2073-4344
• COBISS.SI-ID: 519958297

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 04.01.2022

Secondary language

• Language: Slovenian
• Keywords: gorivne celice s trdnim oksidom, elektrokemični model, rešitev v zaprti obliki, elektrokemična kooksidacija, ogljikov monoksid, vodik

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0401
• Name: Energetsko strojništvo