Abstract
The performance of electrochemical hydrogen compressors (EHCs) with polymer electrolyte membranes which work in the presence of water is affected by the flooding; however, the water permeation through the membranes from the high-pressure side (dozens of MPa) to the low-pressure side has never measured. In this study, a method to measure the permeation from the high hydraulic pressure side (2–20 MPa) to the atmospheric pressure side is shown, using EHC cells and a water hydraulic pump. By this method, liquid-liquid permeation (LLP) and liquid-vapor permeation (LVP) were measured. The higher the hydraulic pressure was, the more the water flux was, and the increase in the permeation was large for LLP. It is considered that the electro-osmotic drag accumulates water on the cathode at low pressure during the initial stage of the electrochemical hydrogen compression and then the permeation from the cathode to the anode exceeds the electro-osmotic drag as the cathode pressure increases, which causes the decrease in the performance by flooding.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
