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Original Articles

Permeation of a H2 + HD + D2 Gas Mixture through a Polymer Membrane

Pages 18-22 | Published online: 09 Sep 2008
 

Abstract

The selective permeation of a H2 + HD + D2 gas mixture through a poly (ethylene terephthalate), PET, membrane was studied at T = 20 °C. In was found that the permeation of the HD through the PET membrane leads to a smaller overall hydrogen-deuterium separation factor than that determined in the permeation experiments with pure H2 and D2. On the other hand, a process of isotopic exchange between deuterium atoms from the penetrant gas stream and hydrogen atoms from the polymer membrane is assumed and discussed in order to explain temporal variations of the H2, HD and D2 concentrations of the permeant gas stream.

Es wurde die selcktive Permeation eines H2 + HD + D2 Gasgemisches durch eine Polyethylenterephthalat-(PET)-Membran bei 20 °C untersucht. Es konnte festgestellt werden, daβ die Permeation des HD durch die PET-Membran zu einem kleineren Gesamt – H/D – Trennfaktor führt als bei der Permeation von reinem H2 und D2. Andererseits wurde ein Isotopenaustausch zwischen D-Atomen aus den eindringenden Gasstrom und der H-Atomen der Polymermembran angenommen und diskutiert, um die zeitlichen Änderungen der H2-, HD- und D2-Konzentrationen im permeierenden Gasstrom.

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