Electrochemical Generation of Ozone in a Membrane Electrode Assembly Cell with Convective Flow

Highly efficient electrochemical generation of ozone on doped tin dioxide anodes was reported recently. Here, we report the scale up of such ozone generation on a membrane electrode assembly (MEA) made with –doped tin dioxide anode. The effects of water flow rate, operating voltage, and current on dissolved ozone concentration, ozone production, current efficiency, and energy efficiency are reported. Ozone production and current efficiency increased with water flow. Operating with a single MEA, of dissolved ozone was produced at an applied current of (current ). With four MEAs operated in a stack, the dissolved ozone production increased to at a total current of (current ) and individual cell voltage of . For the multiple MEA operation, the highest current efficiency was 21.7% based alone on dissolved ozone generation. The lowest energy consumption achieved was at ozone per hour at current of (current ) and water flow of (linear ).