Kamkeng, A.D.N. and Wang, M. orcid.org/0000-0001-9752-270X (2022) Long-term performance prediction of solid oxide electrolysis cell (SOEC) for CO2/H2O co-electrolysis considering structural degradation through modelling and simulation. Chemical Engineering Journal, 429. 132158. ISSN 1385-8947
Abstract
Solid oxide electrolysis cells (SOECs) are promising devices for CO2 and H2O co-electrolysis into syngas. Degradation occurring within SOECs is still of great concern for their commercial deployment. Therefore, it is important to understand the degradation mechanisms and optimize SOEC long-term operation. A 1-dimensional (1D) pseudo-dynamic model was developed for SOEC operating under CO2/H2O co-electrolysis and implemented in Aspen Plus® using Fortran® routines. The structural degradation of a typical SOEC material set: Ni-YSZ cathode, YSZ electrolyte and LSM-YSZ anode were also accounted for. The model was dynamically validated for different current densities (0.5, 0.75 and 1.0 A/cm2). The effects of operating conditions and structural degradation on SOEC long-term electrochemical performance and syngas production are assessed. Performance prediction indicated that increasing the current density and operating temperature initially enhance SOEC performance. However, the operating voltage increases at faster rates at higher current densities and temperatures causing the syngas production efficiency to decrease due to higher power utilisation. Long-term SOEC degradation is mostly due to LSM-YSZ anode delamination with a degradation rate of 3.96 %/1000hrs at 750 °C, 1 bar and 1.5 A/cm2. Applying an anti-oxidant layer on the interconnect surface and adjusting La/Sr ratio in the A-site of LSM considerably reduce the degradation rate by roughly 78% at the anode.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Elsevier B.V. This is an author produced version of a paper subsequently published in Chemical Engineering Journal. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | CO2 Utilisation; Solid Oxide Electrolysis Cell (SOEC); Syngas; Degradation; Modelling and Simulation; Process Analysis |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 14 Sep 2021 10:26 |
Last Modified: | 06 Sep 2022 00:14 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.cej.2021.132158 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:178209 |
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Filename: 2021_08_29_Ariane_SOEC_Modified_Manuscript_V3_Clean_V.pdf
Licence: CC-BY-NC-ND 4.0