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DTIC ADA589263: Extraction of Carbon Dioxide and Hydrogen from Seawater by an Electrochemical Acidification Cell. Part 4. Electrode Compartments of Cell Modified and Tested in Scaled-Up Mobile Unit

An electrochemical acidification cell was scaled-up and integrated into a mobile skid design. Based on four separate evaluations of this cell, a second cell was modified to contain less ion exchange capacity in the electrode compartments. The objective of this modification was to improve the CO2 production rate by reducing the time it takes for the effluent seawater equilibrium pH to reach 6 after a change in polarity. This report details the performance of the modified electrochemical cell as a function of pH, current, time, polarity reversal, and CO2 and H2 recovery. These results are compared to those measured for the original cell.

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