ESTIMATION OF EQUILIBRIUM HYDROGEN PRESSURE – A NEW METHOD

1 ČERMÁK Jiří
Co-authors:
1,2 KRÁL Lubomír
Institutions:
1 Institute of Physics of Materials AS CR, v.v.i., Zizkova 22, CZ-61662 Brno, Czech Republic, EU, cermak@ipm.cz, lkral@ipm.cz
2 CEITEC-Institute of Physics of Materials, AS CR, Zizkova 22, CZ-61662 Brno, Czech Republic, EU
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1500-1505
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
11 views / 5 downloads
Abstract

A new method is proposed to estimation of hydrogen pressure in equilibrium with hydride phase in a hydrogen storage material. It is applicable both for hydrogen absorption and desorption in cases where the hydride phase is formed by nucleation and growth mechanism. The proposed method saves considerably the experimental time replacing the conventional time consuming measurement of pressure-composition isotherms, the so called PCT curves. The proposed evaluation procedure is illustrated using hydrogen chemi-sorption at temperatures 623 K, 573 K and 523 K in chosen hydrogen storage alloys Mg-Si-C, Mg-Li-C and Mg-Na-C.

Keywords: Hydrogen storage, magnesium, new method
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