Kinetics and thermodynamics of hydrogenation-dehydrogenation for Mg-25%TM (TM = Ti, Nb or V) composites synthesized by reactive ball milling in hydrogen

2018 ◽  
Vol 43 (34) ◽  
pp. 16804-16814 ◽  
Author(s):  
Dmytro Korablov ◽  
Flemming Besenbacher ◽  
Torben R. Jensen
Keyword(s):  
Ball Milling ◽  
Kinetics And Thermodynamics ◽  
Milling In Hydrogen

scholarly journals Magnesium–carbon hydrogen storage hybrid materials produced by reactive ball milling in hydrogen

Carbon ◽  
2013 ◽  
Vol 57 ◽  
pp. 146-160 ◽  
Author(s):  
M. Lototskyy ◽  
J.M. Sibanyoni ◽  
R.V. Denys ◽  
M. Williams ◽  
B.G. Pollet ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Ball Milling ◽  
Hybrid Materials ◽  
Milling In Hydrogen

Amelioration of Hydrogen Uptake and Release Features of Magnesium Adding a Polymer Polyvinylidene Fluoride via Milling in Hydrogen in a Planetary Ball Mill

2020 ◽  
Vol 20 (11) ◽  
pp. 7105-7113
Author(s):  
Young Jun Kwak ◽  
Myoung Youp Song
Keyword(s):  
Ball Milling ◽  
Ball Mill ◽  
Polyvinylidene Fluoride ◽  
Hydrogen Uptake ◽  
Hydrogen Atmosphere ◽  
Hydrogen Release ◽  
Planetary Ball Mill ◽  
Planetary Ball Milling ◽  
Milling In Hydrogen ◽  
Uptake And Release

In the present study, a polymer polyvinylidene fluoride (PVDF) was chosen as an adding material to ameliorate hydrogen uptake and release features of Mg. Samples with a composition of 95 wt.% Mg+5 wt.% PVDF (called 95Mg + 5PVDF) were made via milling in hydrogen atmosphere in a planetary ball mill (reactive planetary ball milling). The hydrogen release reaction of magnesium hydride formed in the as-prepared 95Mg+5PVDF during reactive planetary ball milling started at 681 K. In the third cycle (CN = 3), the amount of hydrogen absorbed for 60 min, A (60 min), was 3.44 wt.% hydrogen at 573 K in 12 bar hydrogen. The PVDF is believed to have melted during reactive planetary ball milling, and the sliding or lubrication between Mg particles and hardened steel balls was avoided, leading to a good contact between them and a highly effective milling. The milling in hydrogen atmosphere in a planetary ball mill of Mg with PVDF is believed to have generated defects and cracks. The Mg2C3 produced from PVDF during hydrogen uptake-release cycling is believed to have been spread among particles and to have kept particles from coalescing. To the best of our knowledge, this is the first study to use a polymer PVDF as an additive material for the amelioration of hydrogen uptake and release features of Mg.

In situ synchrotron X-ray diffraction studies of hydrogen desorption and absorption properties of Mg and Mg–Mm–Ni after reactive ball milling in hydrogen

2009 ◽  
Vol 57 (13) ◽  
pp. 3989-4000 ◽  
Author(s):  
R.V. Denys ◽  
A.B. Riabov ◽  
J.P. Maehlen ◽  
M.V. Lototsky ◽  
J.K. Solberg ◽  
...  
Keyword(s):  
Ball Milling ◽  
Hydrogen Desorption ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
X Ray ◽  
Milling In Hydrogen

Development of Magnesium-Based Material with Hydrogen-Storage Capacity of 7 wt%

2021 ◽  
Vol 21 (8) ◽  
pp. 4353-4361
Author(s):  
Myoung Youp Song ◽  
Seong Ho Lee ◽  
Young Jun Kwak ◽  
Eunho Choi
Keyword(s):  
Hydrogen Storage ◽  
Ball Milling ◽  
Storage Capacity ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Hydrogen Storage Capacity ◽  
Hydrogen Storage Properties ◽  
Energy Ball ◽  
Milling In Hydrogen ◽  
Storage Properties

TiCl3 was chosen as an additive to increase hydriding and dehydriding rates of Mg. In our previous works, we found that the optimum percentage of additives that improved the hydriding and dehydriding features of Mg was approximately ten. Specimens consisting of 90 wt% Mg and 10 wt% TiCl3 (named Mg–10TiCl3) were prepared by high-energy ball milling in hydrogen. The specimens’ hydriding and dehydriding properties were then studied. Mg–10TiCl3 had an effective hydrogenstorage capacity (the quantity of hydrogen absorbed in 60 min) of approximately 7.2 wt% at 593 K under 12 bar H2 at the second cycle. After high-energy ball milling in hydrogen, Mg–10TiCl3 contained Mg, β-MgH2, and small amounts of γ-MgH2 and TiH1.924. TiH1.924 remained undercomposed even after dehydriding at 623 K in a vacuum for 2 h. The hydriding and dehydriding properties of Mg–10TiCl3 were compared with those of other specimens such as Mg–10Fe2O3, Mg–10NbF5, and Mg–5Fe2O3–5Ni, for which the hydrogen-storage properties were previously reported.

Effect of Various Additives on the Hydrolysis Performance of Nanostructured MgH2 Synthesized by High-Energy Ball Milling in Hydrogen

2021 ◽  
Vol 59 (9-10) ◽  
pp. 483-490
Author(s):  
D.S. Korablov ◽  
O.V. Bezdorozhev ◽  
S. Gierlotka ◽  
V.A. Yartys ◽  
Yu.M. Solonin
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball ◽  
Milling In Hydrogen

Preparation and Microstructure of Nanocomposite Mg-3Al-Zn Alloy by HDDR Combined with Ball Milling

2011 ◽  
Vol 264-265 ◽  
pp. 496-501
Author(s):  
Hong Fei Sun ◽  
Wa Fang ◽  
Zhen Xing Yu ◽  
Wen Bin Fang
Keyword(s):  
Ball Milling ◽  
Structural Changes ◽  
Average Crystallite Size ◽  
Hydrogen Atmosphere ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Milling In Hydrogen ◽  
Average Size ◽  
Zn Alloy

Nanocrystallite Mg-3Al-Zn alloy was synthesized by ball milling of elemental powders of Mg, Al and Zn under hydrogen atmosphere. The powders of Mg, Al and Zn were mechanical alloying and disproportionated by ball milling under hydrogen and desorption-recombination was then performed. The structural changes due to both the milling in hydrogen and the subsequent desorption-recombination treatment were characterized by X-ray diffraction (XRD). The desorption–recombination behavior of the hydrogenation alloy was investigated by differential scanning calorimetry (DSC). The morphology and microstructure of the final alloy powders subject to desorption–recombination treatment were observed by TEM and HRTEM, respectively. The results showed that, by milling in hydrogen for 60 h, the Mg-3Al-Zn alloy was disproportionated into nano-structured with average size of about 60-70 nm, and a subsequent desorption–recombination treatment at 320°C for 30 min alloy didn’t vary the average crystallite size of powders.

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