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CO2 Desorption Using Electrochemical Carbonate Ion Regenerator Flow System

Direct Air Capture (DAC) is emerging as a promising method of carbon capture for its ability to potentially reverse carbon emissions. However, its high desorption energy prevents it from becoming widespread. This research measured the pH increase of a flow channel electrolyzer system layered with a proton exchange membrane to regenerate CO2 from potassium carbonate through shift in equilibrium, using flow rate and current density as manipulated variables.

Results confirmed CO2 regeneration through the pH curve, as well as production of  hydroxide and hydrogen gas for its potential use as a regenerative desorption module in electrochemical direct air capture (E-DAC) systems.

Jesse Kim