Abstract
In this study a new permeation measurement equipment is presented which is shown to be capable of measuring low and high gas fluxes through different membranes. The new membrane support system which is introduced here is suitable for thin membranes (>10μm) and is expected to provide more accurate results than the design used in earlier permeation measurements.In order to provide a glimpse of the possibilities of the new equipment, hydrogen permeation measurements through a low-density polyethylene (LDPE) and a nickel membrane are presented. The pressure difference dependence of the hydrogen fluxes measured agreed well with the behaviour expected according to Sieverts’ law. In case of the LDPE membrane our results can be explained with the molecular diffusion of hydrogen, which agrees with literature data. As for the nickel membrane the results suggest that under our experimental conditions the speed determining step of the permeation is the atomic diffusion.
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