Hydrogen production from irradiated aluminum hydroxide and oxyhydroxide

Abstract : Dihydrogen production is a critical issue for the current management of nuclear wastes. One potential source of hydrogen generation is the radiolysis of hydrated mineral phases encountered in the nuclear waste transportation and storage casks. We chose to study aluminum hydroxide (Al(OH)3) (Bayerite) and oxyhydroxides (AlOOH) (Boehmite) as model compounds. The determination of molecular hydrogen production was evaluated with respect to structure and particle size at room temperature and after annealing. In order to have a better understanding of the mechanisms and to identify the precursors of molecular hydrogen, we studied the irradiation defects and their stabilities using Electron Paramagnetic Resonance (EPR). The effect of adsorbed water and structural water on the molecular hydrogen production was studied. Different radiation sources were used such as Gamma radiation, electron beam radiations and heavy ions. In the last part, preliminary results related to the impact of impurities on hydrogen production are presented.
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Josiane Kaddissy. Hydrogen production from irradiated aluminum hydroxide and oxyhydroxide. Material chemistry. Université Paris-Saclay, 2016. English. ⟨NNT : 2016SACLS253⟩. ⟨tel-01531842⟩

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