Production of Ultra-Pure Hydrogen for Fuel Cells Using a Module Based on Nickel Capillaries

In this work, an experimental module for hydrogen purification based on nickel capillaries was fabricated. The module was tested by varying the temperature and the difference in the partial pressure of hydrogen on the supply and permeate sides of the capillaries. The maximum hydrogen flow obtained using a module based on 7 nickel capillaries with a wall thickness of 50 µm was 37.2 mL/min at a temperature of 900°C and a hydrogen pressure of 0.9 atm. The stability of the hydrogen flow to thermal cycling in a temperature range 600–800°С for 55 h was demonstrated.