Hydrogen permeation dynamics across a palladium membrane in a varying pressure environment

Wei-Hsin Chen, Po Chih Hsu, Bo Jhih Lin

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Permeation dynamic of hydrogen through a palladium (Pd) membrane in an environment of varying pressure is investigated and analyzed experimentally. By monitoring the instantaneous pressure and mass transfer rate of hydrogen in the conducted system, the present study provides a comprehensive and precise measurement on the permeance of the membrane. It is found that a threshold of pressure difference between the both sides of the membrane for hydrogen permeation is exhibited. That is, when the driving force of the mass transfer is below the minimum pressure difference, hydrogen permeation will not occur. Accordingly, a modified equation accounting for the hydrogen permeation flux through the membrane is suggested. As a whole, the hydrogen permeation flux versus the pressure difference is characterized by a linear relationship, regardless of what the pressure exponent is. Nevertheless, the optimal pressure exponent is located between 0.5 and 0.7. A dimensionless time, the permeation number, is derived to describe the permeation process. The characteristic time of hydrogen permeation depends on the pressure exponent. The experiments reveal that the permeation number is around 7-13 for the hydrogen permeation flux in the system reaching the quasi-steady state.

Original languageEnglish
Pages (from-to)5410-5418
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number11
DOIs
Publication statusPublished - 2010 Jun 1

Fingerprint

Permeation
Palladium
palladium
membranes
Membranes
Hydrogen
hydrogen
exponents
mass transfer
Fluxes
Mass transfer
quasi-steady states
thresholds
Monitoring

All Science Journal Classification (ASJC) codes

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

Cite this

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Hydrogen permeation dynamics across a palladium membrane in a varying pressure environment. / Chen, Wei-Hsin; Hsu, Po Chih; Lin, Bo Jhih.

In: International Journal of Hydrogen Energy, Vol. 35, No. 11, 01.06.2010, p. 5410-5418.

Research output: Contribution to journalArticle

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