Closed-form formulation of the thermodynamically consistent electrochemical model considering electrochemical co-oxidation of CO and H [sub] 2 for simulating solid oxide fuel cells

Andraž Kravos (Author), Tomaž Katrašnik (Author)

Abstract

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.

Keywords

gorivne celice s trdnim oksidom;elektrokemični model;rešitev v zaprti obliki;elektrokemična kooksidacija;ogljikov monoksid;vodik;solid oxide fuel cell;electrochemical model;reduced dimensionality model;closed-form solution;electrochemical co-oxidation;carbon monoxide;hydrogen;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	662:621.352.6
COBISS:	92358147
ISSN:	2073-4344
Views:	192
Downloads:	72
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	gorivne celice s trdnim oksidom;elektrokemični model;rešitev v zaprti obliki;elektrokemična kooksidacija;ogljikov monoksid;vodik;
Type (COBISS):	Article
Pages:	str. 1-24
Volume:	ǂVol. ǂ12
Issue:	ǂiss. ǂ1
Chronology:	Jan. 2022
DOI:	10.3390/catal12010056
ID:	14249367