Registration Number
0224U000462,
0121U108956
, R & D reports
Title
Development of materials for alternative energy using hydrogen technologies and taking into account the impact of working environments
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Head
Zavalii Ihor Yu., д.х.н.
Registration Date
08-01-2024
Organization
Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine
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New magnesium-based alloys and nanocomposite materials with improved hydrogen sorption parameters were investigated for use in hydrogen supply devices for fuel cells, namely, MgTi3Fe3O, MgTi4Fe2O0.3, MgTiFe, MgZr3V3O0.6 and their ternary composites with graphite The catalytic effect of such additives on the process of mechanochemical hydrogenation of magnesium is shown, in particular, the synergistic effect of graphite and the additive, which significantly accelerates the hydrogenation of magnesium. X-ray structural and microstructural studies of the synthesized composites were carried out. It is shown that the addition of a small amount (3 wt.%) of graphite allows obtaining a more dispersed microstructure of composite powders. To study the hydrolytic generation of hydrogen, the synthesized hydride composites were hydrolyzed in distilled water and MgCl2 solutions of different concentrations (0.01...0.1 mol/l). Composites with graphite were shown to have a higher degree of conversion and volume of hydrogen released in reactions with distilled water. The influence of the duration of milling on the hydrolysis characteristics was additionally investigated. It is shown that the use of magnesium chloride solution significantly increases the degree of conversion and the volume of hydrogen released. Also, with a gradual increase in the concentration of MgCl2 in the solution, the increase in the volume of released hydrogen decreases. The synthesized hydride composites showed the following hydrolysis characteristics: Mg–Ti3Fe3O–C released 1270 ml/g of hydrogen (85% conversion rate), Mg–Ti4Fe2O0.3–C released 1220 ml/g (81% conversion rate), Mg–TiFe–C allocated 1255 ml/g (degree of conversion 85 %). It is proposed to modify the traditional ceramics of the (ZrO2+Y2O3)NiO system in two ways: to increase the ionic conductivity of the zirconium phase, use CeO2 oxide doping, and replace part of the nickel phase with CuO oxide, since copper inhibits the dissociation of hydrocar
Product Description
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Berezovets Vasyl V.
Verbovytskyi Yurii V
Zavalii Ihor Yu.
Ostash Orest P.
Pidhurska Viktoriia
Chepilʹ Roman Volodymyrovych
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2024-01-08
