The effect of two-room type electrolysis on the alkalization of seawater was investigated in order to improve the performance of SOx scrubbers for ship exhaust. The simulated seawater was electrolyzed using carbon electrode, and the pH, voltage, current, input power and alkalinity values were measured. The energy efficiency in the two-room type electrolysis was evaluated in comparison with a one-room type and a magnesium electrode type. Under equivalent electrolytic conditions, the two-room type exhibited an energy efficiency 2.3 times higher than that of the one-room type, although its efficiency was only one seventh of that of the self-sacrificial magnesium electrode type.
