Hydrogen permeation and recovery from H2-N2 gas mixtures by Pd membranes with high permeance

Wei Hsin Chen, Ming Hsien Hsia, Yu Li Lin, Yen Hsun Chi, Chang Chung Yang

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14 Citations (Scopus)

Abstract

Hydrogen separation from H2-N2 gas mixtures by means of high-permeance Pd membranes is an appropriate route to gain pure hydrogen for fuel cell applications. To figure out the mass transfer phenomena of H 2 in membrane tubes, H2 permeation and recovery characteristics of two high-permeance Pd membranes are investigated. Four important factors influencing H2 permeation, namely, the H 2 pressure difference, H2 concentration, the flow rate at the exit of the retentate side, and membrane temperature, are taken into account. The experimental results suggest that decreasing H2 concentration, flow rate, and temperature reduce the permeances of the membranes and H2 recovery, even though the H2 pressure difference is identical. The dimensionless permeance, a permeance ratio between H 2-N2 gas mixture and pure H2 as feed gases, is used to evaluate the extent of concentration polarization. Within the investigated ranges of the four factors, the dimensionless permeances of the two membranes are in the ranges of 0.022-0.206 and 0.042-0.359, respectively, revealing that the concentration polarization diminishes the permeance of the membranes down to the level within two orders of magnitude. Nevertheless, over 46% of H2 is recovered.

Original languageEnglish
Pages (from-to)14730-14742
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number34
DOIs
Publication statusPublished - 2013 Nov 13

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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