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Dual-scale pore network modeling of two-phase transport in anode porous transport layer and catalyst layer of proton exchange membrane electrolyzers

Energy Conversion and Management, ISSN: 0196-8904, Vol: 322, Page: 119089
2024
  • 1
    Citations
  • 0
    Usage
  • 2
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    1
  • Captures
    2
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Investigators from Chongqing University Report New Data on Energy Conversion and Management (Dual-scale Pore Network Modeling of Two-phase Transport In Anode Porous Transport Layer and Catalyst Layer of Proton Exchange Membrane Electrolyzers)

2024 DEC 12 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- A new study on Energy - Energy Conversion and

Article Description

Proton exchange membrane (PEM) electrolyzers offer substantial potential for large-scale green hydrogen production, owing to its ability for high current density operation and high purity hydrogen production. However, operating PEM electrolyzers at elevated current densities induces gas–liquid two-phase flow on the anode side, leading to substantial mass transport losses. In this work, a three-dimensional, two-phase, dual-scale pore network model is developed to study the mass transport in anode porous transport layer (PTL) and catalyst layer (CL). The pressure distribution, dissolved oxygen concentration distribution and gas–liquid two-phase distribution within the anode PTL and CL under different operating conditions are obtained by dual-scale PNM. The results show that there are localized areas of high dissolved oxygen concentration in the CL, and bubbles are also formed first in these regions. Moreover, as the invasion process proceeds, it leads to an undesirable increase in gas phase saturation due to the presence of invasion within the same height. As the current density increases to 2000 mA cm −2, the gas phase saturation increases to 29 % within the CL and 23 % in the PTL. This work offers theoretical guidance for mitigating mass transport losses in PEM electrolyzers operating at high current densities.

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