Influences of geometry and flow pattern on hydrogen separation in a Pd-based membrane tube

Wei Hsin Chen, Wei Ze Syu, Chen I. Hung, Yu Li Lin, Chang Chung Yang

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The abatement of concentration polarization in a membrane tube is of the utmost importance for improving the efficiency of hydrogen separation. In order to enhance the performance of hydrogen separation, the characteristics of hydrogen permeation in a Pd-based membrane system under various operating conditions and geometric designs are studied numerically. The effects of Reynolds numbers, shell size, baffle, and pressure difference on hydrogen mass transfer across the membrane are evaluated. The predictions suggest that a larger shell deteriorates concentration polarization, stemming from a larger H2 concentration boundary layer. Baffles equipped in the shell are conducive to disturbing H2 concentration boundary layer and reducing concentration polarization at the retentate side, thereby intensifying H 2 permeation. The more the number of baffles, the less the increment of improvement in H2 permeation is. The installation of one baffle is recommended for enhancing H2 separation and it is especially obvious under the environments of high pressure difference. Within the investigated ranges of Reynolds number at the permeate side and the retentate side, the feasible operating conditions are suggested in this study.

Original languageEnglish
Pages (from-to)1145-1156
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number2
DOIs
Publication statusPublished - 2013 Jan 24

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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