Effect of LaNi 3 Amorphous Alloy Nanopowders on the Performance and Hydrogen Storage Properties of MgH 2

M. Sherif El-Eskandarany, Maryam Saeed, Eissa Al-Nasrallah, Fahad Al-Ajmi and Mohammad Banyan
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M. Sherif El-Eskandarany: Nanotechnology and Advanced Materials Program, Energy and Building Research, Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
Maryam Saeed: Nanotechnology and Advanced Materials Program, Energy and Building Research, Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
Eissa Al-Nasrallah: Nanotechnology and Advanced Materials Program, Energy and Building Research, Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
Fahad Al-Ajmi: Nanotechnology and Advanced Materials Program, Energy and Building Research, Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
Mohammad Banyan: Nanotechnology and Advanced Materials Program, Energy and Building Research, Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait

Energies, 2019, vol. 12, issue 6, 1-15

Abstract: Due to its affordable price, abundance, high storage capacity, low recycling coast, and easy processing, Mg metal is considered as a promising hydrogen storage material. However, the poor de/rehydrogenation kinetics and strong stability of MgH 2 must be improved before proposing this material for applications. Doping MgH 2 powders with one or more catalytic agents is one common approach leading to obvious improving on the behavior of MgH 2 . The present study was undertaken to investigate the effect of doping MgH 2 with 7 wt% of amorphous(a)-LaNi 3 nanopowders on hydrogenation/dehydrogenation behavior of the metal hydride powders. The results have shown that rod milling MgH 2 with a-LaNi 3 abrasive nanopowders led to disintegrate microscale-MgH 2 powders to nanolevel. The final nanocomposite product obtained after 50 h–100 h of rod milling revealed superior hydrogenation kinetics, indexed by short time (8 min) required to absorb 6 wt% of H 2 at 200 °C/10 bar. At 225 °C/200 mbar, nanocomposite powders revealed outstanding dehydrogenation kinetics, characterized by very short time (2 min) needed to release 6 wt% of H 2 . This new tailored solid-hydrogen storage system experienced long cycle-life-time (2000 h) at 225 °C without obeying to sever degradation on its kinetics and/or storage capacity.

Keywords: solid-state hydrogen storage nanocomposites; MgH 2; rod-milling; kinetics; cycle-life-time (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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