Ohmic Potential Drop and Gas Bubble Radius Distribution in Alkaline Water Electrolysis

摘要

A dimensionless correlation for the ohmic resistance between working electrode and diaphragm in the presence of gas bubbles was derived. The resistance was determined in dependence of KOH-concentration, temperature, pressure, gas to liquid volumetric ratio at the outlet of the cell, nature of the nickel electrode surface and distance between working electrode and diaphragm. The effects of various parameters on the average bubble radius and bubble radius distribution at the outlet of the cell were studied.