Effects of gas velocity on formation of carbon deposits on AS-SOFC fuel electrodes

• Autorzy: Motylinski K. , Skrzypkiewicz M. , Naumovich Y. , Wierzbicki M. , Kupecki J.
• Języki publikacji: EN

Abstrakty

EN

The elevated operating temperatures of solid oxide fuel cells (SOFC) create favorable kinetics for the oxidation of carboncontaining 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 the anode in a fuel cell. This process depends on and is driven by the prevailing thermodynamic, kinetic and electrochemical conditions. The present study was premised on the following: in addition to the aforementioned parameters providing for the operating conditions, gas velocity also affects the formation of deposits on the anode. The role of 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 at velocities in the range 0.1 to 0.9 m/s. It was found that carbon deposition was clearly observable approximately 24 hours after the necessary conditions were attained. An intense stage of performance degradation typically lasts for a period of up to 60 hours. An increase in fuel flow velocity leads to an acceleration in the carbon deposition process. The correlation between velocity and cell degradation due to this phenomenon was determined and the corresponding function was proposed.

Słowa kluczowe

EN

Boudouard reaction; carbon deposition; solid oxide fuel cell; SOFC; soot formation

PL

reakcja Boudouarda; wytrącanie węgla; ogniwo paliwowe ze stałym tlenkiem; SOFC; tworzenie sadzy

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2018
• Tom: Vol. 98, nr 4
• Strony: 322--328
• Opis fizyczny: Bibliogr. 29 poz., rys., wykr.

Twórcy

autor

Motylinski K.

• Department of High Temperature Electrochemical Processes, Augustowka 36, 02-981 Warsaw, Poland
• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665 Warsaw, Poland

autor

Skrzypkiewicz M.

• Department of High Temperature Electrochemical Processes, Augustowka 36, 02-981 Warsaw, Poland

autor

Naumovich Y.

• Department of High Temperature Electrochemical Processes, Augustowka 36, 02-981 Warsaw, Poland

autor

Wierzbicki M.

• Department of High Temperature Electrochemical Processes, Augustowka 36, 02-981 Warsaw, Poland

autor

Kupecki J.

• Department of High Temperature Electrochemical Processes, Augustowka 36, 02-981 Warsaw, Poland

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).