Report on a method for measuring and calculating heat conductivity of hydrogen ab/adsorbed in an intermetallic material or porous materials as a function of temperature, pressure, hydrogen absorption capacity and rate, considering dynamic heat flux impact and a harmonised method (< 1 % uncertainty) for stored hydrogen.
In reversible hydrogen storage technologies, the temperature is one of the important influencing factors. The correct assessment of the thermodynamic parameters (such as heat conductivity, enthalpy of ab/adsorption, desorption) are crucial for forecasting the storage capacity. In addition,
the performance of reversible hydrogen storage technologies can be affected by the quality of hydrogen. Therefore, the assessment of the influence of hydrogen pollutants on the capacity of storage as well as the lifetime of these technologies is essential.
Concerning deviations from the original plan, the development of reference materials and methods for hydrogen ad/absorption capacity by a harmonised method with a precision better than <1% was not engaged. After the bibliography studies and dedicated analysis, we concluded that within from
the actual state of knowledge in hydride systems there are no methods that can attain a resolution better than 1%. The dispersion inherent to material sciences studies may justify the dispersion of results attained during round robin test of MgH2 absorption [1]. On the other hand, a deeper understanding of pollutants in hydrides, both as a function of pollutant concentration and number of cycles, is a subject that was developed as it is both feasible with actual experimental means, and is relevant from the point of view of commercial implementation of hydride solutions.
Download report from Aug 2023 (M36)
MAHYTEC, BAM, FHA, MPG
