Publikationen

Magnesium gasar as a potential monolithic hydrogen absorbent

Autor(en)
Grzegorz Boczkal, Malwina Janoska, Daria Setman, Erhard Schafler, Piotr Dlugosz, Pawel Darlak
Abstrakt

The study focuses on the aspect of using the structure of gasars, i.e. materials with directed open porosity, as a potential hydrogen storage. The structure of the tested gasar is composed of a large number of thin, open tubular pores running through the entire longitudinal section of the sample. This allows hydrogen to easily penetrate into the entire sample volume. The analysis of pore distribution showed that the longest diffusion path needed for full penetration of the metal structure with hydrogen is about L = 50–70 μm, regardless of the external dimensions of the sample. Attempts to hydrogenate the magnesium gasar structure have shown its ability to accumulate hydrogen at a level of 1 wt%. The obtained results were compared with the best result was obtained for the ZK60 alloy after equal channel angular pressing (ECAP) and crushed to a powder form. The result obtained exceeded 4 wt% of hydrogen accumulated in the metal structure, at theoretical 6.9 wt% maximum capacity. A model analysis of the theoretic absorption capacity of pure magnesium was also carried out based on the concentration of vacancies in the metal structure. The theoretical results obtained correlate well with experimental data.

Organisation(en)
Physik Nanostrukturierter Materialien, Dynamik Kondensierter Systeme
Externe Organisation(en)
AGH University of Science and Technology, Krakow Institute of Technology
Journal
International Journal of Hydrogen Energy
Band
46
Seiten
13106-13115
Anzahl der Seiten
10
ISSN
0360-3199
DOI
https://doi.org/10.1016/j.ijhydene.2021.01.166
Publikationsdatum
04-2021
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik
Schlagwörter
ASJC Scopus Sachgebiete
Renewable Energy, Sustainability and the Environment, Fuel Technology, Condensed Matter Physics, Energy Engineering and Power Technology
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/magnesium-gasar-as-a-potential-monolithic-hydrogen-absorbent(642b0f95-07c9-4bbb-928c-3c2a43d1588e).html