Gas and water vapor permeation in a short-side-chain PFSI membrane

J. Catalano, M.G. Baschetti, M.G. De Angelis, G.C. Sarti, A. Sanguineti, P. Fossati

Research output: Contribution to journalArticlepeer-review


The gas and vapor transport into films of Hyflon® Ion H, a short-side-chain perfluorosulfonic acid ionomeric (PFSI) membrane, suitable for use in proton exchange membrane fuel cells (PEMFC), has been studied at various temperatures (35°C, 50°C, and 65°C). The permeability and diffusivity values of He, N2, and O2 show an Arrhenius type dependence on temperature in the range inspected. Pure water vapor permeation was studied at 65°C, at low/medium activity values. The determination of water transport parameters has been performed by solving numerically the water mass balance with a variable diffusion coefficient and accounting for a water immobilization reaction onto the hydrophilic sites of the matrix. The boundary conditions vary in time according to the mass balance on the penetrant volume. The solution allows to represent closely the experimental permeation behavior in all its stages. © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)341-346
Number of pages6
Issue number1-3
Publication statusPublished - 2009


  • Gases
  • Helium
  • Ion exchange
  • Ion exchange membranes
  • Ions
  • Oceanography
  • Parameter estimation
  • Permeation
  • Proton exchange membrane fuel cells (PEMFC)
  • Water vapor
  • Arrhenius
  • Diffusivities
  • Gas permeation
  • Hydrophilic sites
  • Immobilization reactions
  • Mass balances
  • matrixes
  • Perfluorosulfonic acids
  • Permeation behaviors
  • PFSI membrane
  • Pure waters
  • Short side chains
  • Vapor transports
  • Variable diffusion coefficients
  • Water mass
  • Water transports
  • Water vapor permeation
  • Gas permeable membranes
  • diffusivity
  • ion exchange
  • membrane
  • permeability
  • transport process


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