The effect of ball-milling gas environment on the sorption kinetics of MgH2 with/without additives for hydrogen storage. (28th January 2019)

• Record Type: Journal Article
• Authors: Alsabawi, K.; Gray, E.MacA.; Webb, C.J.
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 5(2019)
• Page Start: 2976
• Page End: 2980
• Publication Date: 2019-01-28
• Subjects: Magnesium hydride -- Hydrogen storage -- Catalyst -- Milling gas -- Sorption kinetics; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.12.026
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A study of the effect of the ball-milling gas environment on the kinetic enhancement of MgH2 with different additives was conducted using argon and hydrogen. The as-sourced MgH2 was milled for 20 h and then milled for a further 2 h after adding 1–2 mol% of one of the additives titanium isopropoxide, niobium oxide or carbon buckyballs, varying the gas environment for both ball-milling stages. The milling environment had little or no effect on the desorption kinetics in most cases. However, in some cases, the absorption uptake differed by up to 2 wt%, depending on the gas used. This effect was not consistent among the composite samples surveyed, demonstrating the importance of reporting all information about the ball-milling processes used, including the gas environment. Highlights: Effect of milling gas environment on the sorption kinetics of MgH2 with additives. Custom Sieverts/TPD instrument to 340 bar and temperatures up to 773 K operation. Significant differences observed between some Ar- and H2 - milled samples.