2019
DOI: 10.1149/09101.0753ecst
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Fast Fuel Variation and Identification of SOFC System Changes Using Online Health Monitoring Tools and Fault Diagnosis

Abstract: The greatest challenges of the solid oxide fuel cell (SOFC) technology are its reliability and durability, both of them considering a variety of possible fuels. To address those issues, understanding of the ongoing processes in SOFCs is of crucial importance. The ability to monitor electrochemical processes online and to identify fast alternating operating conditions offers a possibility to determine degradation-inducing processes at their preliminary stage. Thus, their early identification would provide timel… Show more

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Cited by 5 publications
(3 citation statements)
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“…The studies on diagnostic methods are mostly limited to single-cells or short-stacks with few cells and not applied at system level as can be seen in [18,28,[87][88][89][90]93,94,96,97,99,108]. In addition, simplifying limitations to a known and simplified gas composition such as pure hydrogen or methane as well as a mixture with a defined amount of water vapor are used, see [92][93][94]96,97,99,108]. In EIS the high measuring effort and the long measuring time to record a complete impedance spectrum is disadvantageous for application in SOFC-systems.…”
Section: Diagnostic Fuel Cell Methodsmentioning
confidence: 99%
“…The studies on diagnostic methods are mostly limited to single-cells or short-stacks with few cells and not applied at system level as can be seen in [18,28,[87][88][89][90]93,94,96,97,99,108]. In addition, simplifying limitations to a known and simplified gas composition such as pure hydrogen or methane as well as a mixture with a defined amount of water vapor are used, see [92][93][94]96,97,99,108]. In EIS the high measuring effort and the long measuring time to record a complete impedance spectrum is disadvantageous for application in SOFC-systems.…”
Section: Diagnostic Fuel Cell Methodsmentioning
confidence: 99%
“…Whereas degraded catalysts are easily exchangeable and cheaper. Degradation of the SOFC anode can have several reasons: (i) solid carbon deposition, which is one major challenge when using carbonaceous fuels as shown in [23][24][25][26][27][28][29], (ii) oxidation of the anode material, especially nickel, (iii) agglomeration of the nickel grains and (iv) poisoning by sulphur and chlorine, which is examined within [30,31]. The likelihood of degradation due to carbon deposition and nickel oxidation can be estimated by the C-H-O (Carbon-Hydrogen-Oxygen) ratio of the fuel gas composition as shown in [32][33][34].…”
Section: Introductionmentioning
confidence: 99%
“…Since waste biogas and gasified biomass contain large amounts of methane, early degradation of the SOFC anode is possible (7). This can be caused by deposition of solid carbon, oxidation of the nickel anode or chlorine and sulphur poisoning (8)(9)(10)(11)(12)(13)(14)(15). The degradation causes an early deterioration of the power output and a short lifetime of the SOFC.…”
Section: Introductionmentioning
confidence: 99%