The effect of inaccurate volume calibrations on hydrogen uptake measured by the Sieverts method

The Sieverts technique is a popular method of measuring the uptake of gas on a sample and is an important tool for the characterisation of hydrogen uptake by potential hydrogen storage materials. An analysis of the consequences of errors in the calibration of volumes in this technique has been made...

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Bibliographic Details
Published in:International journal of hydrogen energy 2014-02, Vol.39 (5), p.2168-2174
Main Authors: Webb, C.J., Gray, E.MacA
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Calibration
Energy
Errors
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Hydrogen storage materials
Hydrogen-based energy
Mathematical analysis
Sieverts
Uptakes
Volume calibrations
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Summary:The Sieverts technique is a popular method of measuring the uptake of gas on a sample and is an important tool for the characterisation of hydrogen uptake by potential hydrogen storage materials. An analysis of the consequences of errors in the calibration of volumes in this technique has been made using hydrogen absorption on an AB2 alloy as an example. Trends in the error in the uptake as a function of errors in the volumes have been explained in terms of the equations for uptake. Significant advantages are found for calibration techniques for which the ratio of volumes is an intrinsic measurement. •Comprehensive analysis of the effect of volume errors in the Sieverts method for gas uptake measurements.•Example of hydrogen uptake on AB2 alloy.•Recommendations for volume calibration methodology.•Empty cell isotherms for volume calibration checks.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2013.11.121