Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Investigation of Temperature Effect on Electrode Reactions of Molten Carbonate Electrolysis Cells and Fuel Cells using Reactant Gas Addition Method

  • Samuel Koomson (Department of Chemical & Biological Engineering, Hanbat National University) ;
  • Choong-Gon Lee (Department of Chemical & Biological Engineering, Hanbat National University)
  • Received : 2024.05.09
  • Accepted : 2024.06.26
  • Published : 2024.08.01
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Abstract

The impact of temperature on electrode reactions in 100 cm2 molten carbonate cells operating as Fuel Cells (FC) and Electrolysis Cells (EC) was examined using the Reactant Gas Addition (RA) method across a temperature range of 823 to 973 K. The RA findings revealed that introduction of H2 and CO2, reduced the overpotential at Hydrogen Electrode (HE) in both the modes. However, no explicit temperature dependencies were observed. Conversely, adding O2 and CO2 to the Oxygen Electrode (OE) displayed considerable temperature dependencies in FC mode which can be attributed to increased gas solubility due to the electrolyte melting at higher temperatures. In EC mode, there was no observed temperature dependence for overpotential. Furthermore, the addition of O2 led to a decrease in overpotential, while CO2 addition resulted in an increased overpotential, primarily due to changes in the concentration of O2 species.

Keywords

Acknowledgement

This research was supported by the New & Renewable Energy Core Technology Programme of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resources from the Ministry of Trade, Industry, and Energy, Republic of Korea (No. 20213030040080).

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