Study on the Behaivor of Bubbles in the Separators

Abstract >> The bubbles made of hydrogen and oxygen gases producted by electrolysis disturb the electrolysis,but the behavior of these bubbles in the electrolysis stack isn't clearly defined. In order to study on the behaviorof bubbles in the flow pattern of the meshes type separator, the flow visualization experiment was performed byusing of a visible alkaline electrolysis stack and a stereoscopic microscope. As the results, a fine size bubblesadhered to the separator's surface in the electrolyte solution have grown large sized bubbles until each bubble'sbuoyance is lager than the sum of surface adhesion force and weight. And then the large bubbles flow into theupper area of the separator. Also, as wide area of the separator have been occupied by various sized bubbles, the electrolysis efficiency is declined. Key words : Alkali(알카리), Electrolysis(전기분해), Separator(분리판), Hydrogen(수소), Bubble(기포), Behavior(거동), Flow visualization(유동 가시화) † Corresponding author : jyg_kr@kumoh.ac.kr