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The Influence of Sulfur Formation on Performance and Reforming Chemistry of SOFC Anodes Operating on Methane Containing Fuel

Riegraf, Matthias and Yurkiv, Vitaliy and Schiller, Günter and Costa, Rémi and Latz, Arnulf and Friedrich, K. Andreas (2015) The Influence of Sulfur Formation on Performance and Reforming Chemistry of SOFC Anodes Operating on Methane Containing Fuel. Journal of The Electrochemical Society, 162 (12), F1324-F1332. Electrochemical Society, Inc.. DOI: 10.1149/2.0291512jes ISSN 0013-4651

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Official URL: http://jes.ecsdl.org/cgi/content/abstract/162/12/F1324

Abstract

This paper presents a detailed analysis of the influence of sulfur formation on performance and efficiency of Solid Oxide Fuel Cells (SOFC) operating on methane containing fuels. Our previously developed multi-step reaction mechanism of sulfur formation and oxidation is coupled with a complex heterogeneous mechanism of methane reforming, channel gas-flow, porous-media transport and elementary kinetic charge transfer and is used to describe sulfur-induced degradation and performance drops of Ni/YSZ anodes. Experimental literature data is used to validate the model and to interpret important aspects of cell performance degradation. Comparisons of the model predictions to the experiments illustrate that the developed model, without any modifications, reproduces the observed voltage decrease well and is able to capture the changes in fuel conversion and selectivity for different gas mixtures. It is shown that atomically adsorbed sulfur significantly influences heterogeneous reforming chemistry, causing substantial voltage degradation. At constant current densities, cell voltage decreases in a non-linear way with faster recovery than in H2/H2O mixture.

Item URL in elib:https://elib.dlr.de/98062/
Document Type:Article
Title:The Influence of Sulfur Formation on Performance and Reforming Chemistry of SOFC Anodes Operating on Methane Containing Fuel
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Riegraf, MatthiasDLRUNSPECIFIED
Yurkiv, Vitaliyvitaliy.yurkiv (at) dlr.deUNSPECIFIED
Schiller, Günterguenter.schiller (at) dlr.deUNSPECIFIED
Costa, Rémiremi.costa (at) dlr.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Journal of The Electrochemical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:162
DOI :10.1149/2.0291512jes
Page Range:F1324-F1332
Publisher:Electrochemical Society, Inc.
ISSN:0013-4651
Status:Published
Keywords:Solid oxide fuel cell (SOFC), Ni/YSZ anode, sulfur poisoning, degradation, elementary kinetic modeling, methane reforming
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
Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Riegraf, Matthias
Deposited On:03 Sep 2015 09:35
Last Modified:31 Jul 2019 19:54

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