| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pedersen, Allan Schrøder
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2004Dehydrogenation kinetics for pure and nickel-doped magnesium hydride investigated by in-situ, time-resolved powder diffraction (poster)
- 2000Bulk amorphous alloys: Preparation and properties of (Mg 0 . 9 8 Al 0 . 0 2 ) x (Cu 0 . 7 5 Y 0 . 2 5 ) 1 0 0 - xcitations
- 2000Numerical modelling of the spray forming process: The effect of process parameters on the deposited material
- 2000Preparation and Properties of Mg-Cu-Y-Al bulk Amorphous Alloys
- 2000Bulk amorphous alloys: Preparation and properties of (Mg0.98Al0.02)x(Cu0.75Y0.25)100-xcitations
Places of action
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conferencepaper
Dehydrogenation kinetics for pure and nickel-doped magnesium hydride investigated by in-situ, time-resolved powder diffraction (poster)
Abstract
The dehydrogenation kinetics of pure and nickel-doped magnesium hydride was investigated by in-situ, time-resolved X-ray powder diffraction. A special reaction cell allowed the study of gas/solid reactions and analysis of the exhaust gas by massspectroscopy. X-ray data (0 <2è <120°) was collected under isothermal conditions with a time resolution of 45 s. Three phases were identified, Mg,MgH2 and MgO, and the phase fractions were extracted for each phase. Dehydrogenation curves wereconstructed and analyzed by the Johnson-Mehl-Avrami formalism in order to derive rateconstants at different temperatures. Apparent activation energies were calculated from Arrhenius plots revealing values of ca. 300 and 250 kJ/mol for the dehydrogenationof pure and nickel-doped magnesium hydride, respectively, in accord with EA= 270 kJ/mol measured by thermal desorption spectroscopy for these non-activated materials. Furthermore, the difference in apparent activation energy of ca. 50 kJ/mol compares totheoretical calculations for the atomisation of H2 molecules, which might be the rate-determining step in the dehydrogenation process.