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Reformate-operated SOFC anode performance and degradation considering solid carbon formation: A modeling and simulation study

Yurkiv, Vitaliy (2014) Reformate-operated SOFC anode performance and degradation considering solid carbon formation: A modeling and simulation study. Electrochimica Acta, 143, pp. 114-128. Elsevier. DOI: 10.1016/j.electacta.2014.07.136 ISSN 0013-4686

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Official URL: http://www.sciencedirect.com/science/article/pii/S0013468614015588

Abstract

tAn elementary kinetic model is established to represent the coupled behavior of (electro)-chemistry,transport and degradation processes in the porous Ni/YSZ anode of solid oxide fuel cells (SOFC). Thismodel is applied to support the development and evaluation of solid carbon formation mechanisms atNi/YSZ anodes. The simulation of cells, operated on partially reformed hydrocarbons, show that perfor-mance and degradation are influenced significantly by the operation temperature and applied potential.Specifically at OCV and high temperature (>1000 K), a surface carbon layer is formed which covers Ni sur-face and Ni/YSZ/gas-phase three-phase boundary, blocking heterogeneous and charge-transfer reactions.However, at lower temperature (<1000 K) carbon growth mainly proceeds inside the anode porous phaseleading to significant diffusion polarization. At constant current densities, the amount of formed carbonis substantially lower, however, it causes undesirable effect, such as dusting of Ni particles. Experimentaldata from literature is used for model validation.

Item URL in elib:https://elib.dlr.de/90457/
Document Type:Article
Title:Reformate-operated SOFC anode performance and degradation considering solid carbon formation: A modeling and simulation study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yurkiv, Vitaliyvitaliy.yurkiv (at) dlr.deUNSPECIFIED
Date:10 October 2014
Journal or Publication Title:Electrochimica Acta
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:143
DOI :10.1016/j.electacta.2014.07.136
Page Range:pp. 114-128
Publisher:Elsevier
ISSN:0013-4686
Status:Published
Keywords:Solid oxide fuel cell (SOFC), anode deposit formation, degradation, elementary kinetics, modeling and simulation, validation.
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Yurkiv, Vitaliy
Deposited On:29 Oct 2014 10:02
Last Modified:06 Sep 2019 15:16

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