Abstract
Decomposition of MgH2 has been studied by means of simultaneous thermal desorption spectroscopy (TDS) and differential scanning calorimetry (DSC). Measurements have been accomplished in an experimental set-up composed of a differential scanning calorimeter connected through a capillary tube to a mass spectrometer. The experimental system allows the simultaneous determination of the heat absorbed by and the hydrogen evolved from MgH2 during its thermal decomposition. The H-desorption from magnesium hydride samples non-exposed to air has been studied. The desorption curves are analysed with a nucleation and growth formalism and kinetic parameters are obtained.
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