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Article

Analysis of Soot Deposition Mechanisms on Nickel-Based Anodes of SOFCs in Single-Cell and Stack Environment

1
Institute of Power Engineering, Mory 8, 01-330 Warsaw, Poland
2
Center for Hydrogen Technologies (CTH2), Institute of Power Engineering, Augustowka 36, 02-981 Warsaw, Poland
3
Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665 Warsaw, Poland
4
National Fuel Cell Research Center (NFCRC), University of California, Irvine Engineering Laboratory Facility, Irvine, CA 92697-3550, USA
*
Author to whom correspondence should be addressed.
Processes 2020, 8(11), 1370; https://doi.org/10.3390/pr8111370
Received: 28 September 2020 / Revised: 26 October 2020 / Accepted: 27 October 2020 / Published: 29 October 2020
(This article belongs to the Special Issue Recent Advances of Solid Oxide Fuel Cells (SOFC))
Solid oxide fuel cells (SOFCs) can be fueled with various gases, including carbon-containing compounds. High operating temperatures, exceeding 600 °C, and the presence of a porous, nickel-based SOFC anode, might lead to the formation of solid carbon particles from fuels such as carbon monoxide and other gases with hydrocarbon-based compounds. Carbon deposition on fuel electrode surfaces can cause irreversible damage to the cell, eventually destroying the electrode. Soot formation mechanisms are strictly related to electrochemical, kinetic, and thermodynamic conditions. In the current study, the effects of carbon deposition on the lifetime and performance of SOFCs were analyzed in-operando, both in single-cell and stack conditions. It was observed that anodic gas velocity has an impact on soot formation and deposition, thus it was also studied in depth. Single-anode-supported solid oxide fuel cells were fueled with gases delivered in such a way that the initial velocities in the anodic compartment ranged from 0.1 to 0.7 m/s. Both cell operation and post-mortem observations proved that the carbon deposition process accelerates at higher anodic gas velocity. Furthermore, single-cell results were verified in an SOFC stack operated in carbon-deposition regime by dry-coupling with a downdraft 150 kWth biomass gasifier. View Full-Text
Keywords: Boudouard reaction; carbon deposition; SOFC Boudouard reaction; carbon deposition; SOFC
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MDPI and ACS Style

Motylinski, K.; Blesznowski, M.; Skrzypkiewicz, M.; Wierzbicki, M.; Zurawska, A.; Baran, A.; Bakala, M.; Kupecki, J. Analysis of Soot Deposition Mechanisms on Nickel-Based Anodes of SOFCs in Single-Cell and Stack Environment. Processes 2020, 8, 1370. https://doi.org/10.3390/pr8111370

AMA Style

Motylinski K, Blesznowski M, Skrzypkiewicz M, Wierzbicki M, Zurawska A, Baran A, Bakala M, Kupecki J. Analysis of Soot Deposition Mechanisms on Nickel-Based Anodes of SOFCs in Single-Cell and Stack Environment. Processes. 2020; 8(11):1370. https://doi.org/10.3390/pr8111370

Chicago/Turabian Style

Motylinski, Konrad, Marcin Blesznowski, Marek Skrzypkiewicz, Michal Wierzbicki, Agnieszka Zurawska, Arkadiusz Baran, Maciej Bakala, and Jakub Kupecki. 2020. "Analysis of Soot Deposition Mechanisms on Nickel-Based Anodes of SOFCs in Single-Cell and Stack Environment" Processes 8, no. 11: 1370. https://doi.org/10.3390/pr8111370

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