CROSS-FLOW WATER ELECTROLYSIS

Processes for alkaline electrolysis of water may involve pumping an electrolyte in a circuit between an anode half-cell and a cathode half-cell so as to keep the electrolyte concentration constant throughout the electrolysis process. One such process may involve supplying electrolyte from a first liquid reservoir to the anode half-cell and supplying an anolyte flowing out of the anode half-cell to an anodic gas separator, where gas is separated from the anolyte. The electrolyte may be supplied from a second liquid reservoir to the cathode half-cell and a catholyte flowing out of the cathode half-cell may be supplied to a cathodic gas separator, where gas is separated from the catholyte. Gas-stripped anolyte from the anodic gas separator may be returned to the second liquid reservoir and gas-stripped catholyte from the cathodic gas separator may be returned to the first liquid reservoir.