Spatiotemporal simulation of nickel oxide and carbon phases formation in solid oxide fuel cells (SOFC)
- The formation of secondary phases in the porous electrodes is a severe mechanism affecting the lifetime of solid oxide fuel cells (SOFC). It can occur via various chemical mechanisms and it has a significant influence on cell performance due to pore clogging and deactivation of active surfaces and triple-phase boundary (TPB). We present a modeling and simulation study of nickel oxide formationThe formation of secondary phases in the porous electrodes is a severe mechanism affecting the lifetime of solid oxide fuel cells (SOFC). It can occur via various chemical mechanisms and it has a significant influence on cell performance due to pore clogging and deactivation of active surfaces and triple-phase boundary (TPB). We present a modeling and simulation study of nickel oxide formation (reoxidation) and carbon formation (coking) within the SOFC anode. We use a 2D continuum model based on a multi-phase framework [Neidhardt et al., J. Electrochem. Soc., 159, 9 (2012)] that allows the introduction of arbitrary solid phases (here: Ni, YSZ, NiO, Carbon) plus gas phase. Reactions between the bulk phases are modeled via interface-adsorbed species and are described by an elementary kinetic approach. Published experimental data are used for parameterization and validation. Simulations allow the prediction of cell performance under critical operation conditions, like (i) a non-fuel operation test, where NiO formation is taking place (Figure 1a), or (ii) an open circuit voltage (OCV) stability test under hydrocarbon atmosphere, where solid carbon is formed (Figure 1b). Results are applied for enhanced interpretation of experimental data and for prediction of safe operation conditions.…
Document Type: | Conference Proceeding |
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Conference Type: | Konferenzartikel |
Zitierlink: | https://opus.hs-offenburg.de/1532 | Bibliografische Angaben |
Title (English): | Spatiotemporal simulation of nickel oxide and carbon phases formation in solid oxide fuel cells (SOFC) |
Conference: | International Conference Fundamentals and Development of Fuel Cells (5. : 16 to 18 April 2013 : Karlsruhe, Germany) |
Author: | Jonathan Philipp Neidhardt, Vitaliy Yurkiv, Wolfgang G. BesslerStaff MemberORCiDGND |
Year of Publication: | 2013 |
Creating Corporation: | FDFC |
First Page: | 1 |
Last Page: | 13 |
Parent Title (English): | FDFC 2013 |
URL: | https://elib.dlr.de/84933/ |
Language: | English | Inhaltliche Informationen |
Institutes: | Forschung / INES - Institut für nachhaltige Energiesysteme |
Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) | |
Institutes: | Bibliografie |
GND Keyword: | Brennstoffzelle; Karbon; Nickel; Oxidation | Formale Angaben |
Open Access: | Open Access |
Licence (German): | Urheberrechtlich geschützt |