Microkinetic Modeling of CO2 and H2O Electrolysis on Ni in a Solid Oxide Electrolysis Cell: A Critical Evaluation

Janardhanan, Vinod M. (2021) Microkinetic Modeling of CO2 and H2O Electrolysis on Ni in a Solid Oxide Electrolysis Cell: A Critical Evaluation. Journal of The Electrochemical Society, 168 (12). ISSN 0013-4651

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Abstract

Solid oxide cells (SOC) are ideal candidates for the electrochemical conversion of H2O and CO2 into H2 and CO using renewable sources. This work develops different electrochemical models for the reduction of H2O and CO2 based on elementary step kinetics and discriminates them based on their ability to predict experimentally measured cell performances. The thermo-catalytic chemistry is represented using a micro kinetic model, which is coupled to the electrochemical model through the surface coverage terms. A one dimensional representation of SOC resolving the cell across the thickness of the electrodes is used for simulations. The source terms for the species transport Eqs. are calculated using the micro kinetic model by applying mean field approximation. The discussion in the paper covers aspects related to parameter fitting, model development, solution methodology, model discrimination and identification of rate limiting step. © 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

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IITH Creators:

IITH Creators	ORCiD
Janardhanan, Vinod M.	http://orcid.org/0000-0002-3458-4169

Item Type:

Article

Uncontrolled Keywords:

% reductions; Cell-be; Cell/B.E; Cell/BE; Critical evaluation; Electrochemical conversion; Electrochemical modeling; Microkinetic modeling; Renewable sources; Solid-oxide cells

Subjects:

Chemical Engineering

Divisions:

Department of Chemical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

06 Sep 2022 06:35

Last Modified:

06 Sep 2022 06:35

URI:

http://raiithold.iith.ac.in/id/eprint/10443