Technological consideration on large-scale alkaline water electrolyzed for hydrogen

Abstract

This paper mentions activated anodes and gas effects on electrodes in electrolyte, current distribution, leakage current resulting from the electrolytic process, gas purity, and safety of the process during water electrolysis, which have a large impact on plant performance, with regard to the actual alkaline water electrolysis technology. When the plant operation is faced with day and night intermittent operation, the degradation of anode coating is remarkable. Although the safety is top issues in actual plant operation, unlike common sense images, the most dangerous condition is when driving a plant at a low load. It should be understood that low-energy operation is the most dangerous condition because it is easy to reach the explosion limit of hydrogen gas.