期刊名称：Bulletin of the Institute of Heat Engineering
印刷版ISSN：2083-4187
出版年度：2018
语种：English
出版社：Warsaw University of Technology
摘要：The elevated operating temperature of the solid oxide fuel cells (SOFC) enables favorable kinetics of oxidation of carbon-containing gas mixtures, which may include carbon monoxide and light organic compounds. The presence of carbon-based components in the fuel might result in the formation and deposition of soot on the surface of anode of a fuel cell. This process depends on and is driven by the thermodynamic, kinetic and electrochemical conditions. In the present study, it was claimed that in addition to the aforementioned parameters which specify the operating conditions, the velocity of the anodic also affects the formation of deposits. The role of the fuel gas velocity in the process was studied experimentally using 5 cm x 5 cm anode supported solid oxide fuel cells (AS-SOFC) at 750°C under velocities in range from 0.1 to 0.9 m/s. It was found, that carbon deposition was clearly observable after approximately 24 hours after the necessary conditions were reached. Intense stage of the performance degradation typically lasts for a period of up to 60 hours. Increase of the fuel flow velocity leads to acceleration of the carbon deposition process. Correlation between the velocity and the degradation of the cell due to this phenomena was determined and the corresponding function was proposed.
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