Surface effects and CO/CO2 influence in the H2 permeation through a Pd-Ag membrane: A comprehensive model

Patricia Pérez, Carolina A. Cornaglia, Adélio Mendes, Luis M. Madeira, Silvano Tosti

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The permeability of a 0.175 mm thick Pd-Ag tubular membrane to pure H2 and binary mixtures of H2/CO or H2/CO2 was studied. The tests were performed in a wide range of temperature (523-723 K) and pressure (200-800 kPa). Pure H2-permeation through a dense metal membrane is described by the Sieverts' law. However, it was already found that the H2 permeation does not follow the Sieverts' law when other components are present in the feed and namely CO or CO2. In this work, it is proposed a new permeation model based on the Sieverts' law considering: i) the mass transfer resistance due to the surface effects and ii) the barrier effect due to the presence of either CO or CO2. The model was successfully validated against experimental data of hydrogen permeation for binary (H2/CO and H2/CO2) experiments for every working temperature and pressure.
Original languageEnglish
Pages (from-to)6566 - 6572
Number of pages7
JournalInternational Journal of Hydrogen Energy
Issue number20
Publication statusPublished - 1 Jun 2015
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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