Analysis of electrochemical hydrogen absorption capacity for Pd-Ni nanoparticle incorporated MmNi5−XMX-based metal hydride

2011 ◽  
Vol 36 (8) ◽  
pp. 935-943
Author(s):  
M. A. Rivera ◽  
S. A. Gamboa ◽  
P. J. Sebastian
Keyword(s):  
Metal Hydride ◽  
Hydrogen Absorption ◽  
Absorption Capacity

Manufacturing of Hydride-Forming Alloys from Mixed Titanium-Iron Oxide

2013 ◽  
Vol 746 ◽  
pp. 14-22 ◽  
Author(s):  
M.W. Davids ◽  
M. Lototskyy ◽  
B.G. Pollet
Keyword(s):  
Iron Oxide ◽  
Sorption Capacity ◽  
Metal Hydride ◽  
Hydrogen Absorption ◽  
Reducing Agents ◽  
Absorption Capacity ◽  
Hydrogen Sorption ◽  
Two Stage

Synthesis of TiFebased metal hydride-forming alloy from mixed titanium iron oxide (ilmenite, FeTiO3) was carried out by a two-stage reduction of the latter using H2and CaH2as reducing agents. The reversible hydrogen absorption capacity of the TiFe based material was about 0.5 wt. % H, that is significantly lower than the corresponding values (~1.8 wt. % H) reported in the literature. The main reason for that was in too high amount of oxygen present in theas-prepared TiFe alloy. Thus in order to improve the hydrogen absorption of the raw TiFe, the material was further alloyed together with Zr, Cr, Mn, Ni and Cu to yield an AB2alloy. For theas-prepared AB2alloy, the reversible hydrogen sorption capacity was about 1.3 wt. % H atP= 40 bar and >1.8 wt. % atP= 150 bar, which is acceptable for stationary applications. Finally, the material was found to be superior when compared to known AB2-type alloys, with regard to their activation and poisoning tolerance.

Pd–Ru electrodeposits with high hydrogen absorption capacity

2012 ◽  
Vol 20 ◽  
pp. 175-177 ◽  
Author(s):  
K. Hubkowska ◽  
M. Łukaszewski ◽  
A. Czerwiński
Keyword(s):  
Hydrogen Absorption ◽  
Absorption Capacity ◽  
High Hydrogen

scholarly journals Comparing hydrogen absorption kinetics of the samples of intermetallic compound and metal hydride compact on its basis

2021 ◽  
Vol 2057 (1) ◽  
pp. 012043
Author(s):  
I A Romanov ◽  
V I Borzenko ◽  
A N Kazakov
Keyword(s):  
Intermetallic Compound ◽  
Metal Hydride ◽  
Hydrogen Absorption ◽  
Reaction Rate ◽  
Nickel Foam ◽  
High Confidence ◽  
Compact Sample ◽  
Kinetics Of ◽  
Rate Controlling Step ◽  
Absorption Of Hydrogen

Abstract This work is devoted to an experimental study and comparison of the kinetics of hydrogen absorption by an intermetallic compound LaNi4.4Al0.3Fe0.3 in form of pure intermetallic compound free backfill and a compact based on it obtained by cold pressing with a spiral matrix of nickel-foam. To calculate the kinetic parameters of the hydrogen absorption reaction, the initial rates method is used. The PCT absorption isotherms are measured at temperatures of 313, 333, and 353 K. The experimental data are described with quite high confidence by the chosen model, which assumes that the reaction rate controlling step is the dissociative absorption of hydrogen on the surface of the a-phase. The rate of hydrogen absorption increases with increasing pressure drop and temperature. It is shown that the rate of hydrogen absorption by the sample of pure IMC is significantly less dependent on temperature compared to the compact sample. In addition, the reaction rate at temperatures of 313 and 333 K is higher for the free backfill sample, and at 353 K it is higher for the metal hydride compact. The values of the absorption constant and the activation energy of the hydrogen absorption reaction are determined for both samples.

Numerical analysis of the effects of particle radius and porosity on hydrogen absorption performances in metal hydride tank

2019 ◽  
Vol 250 ◽  
pp. 1065-1072 ◽  
Author(s):  
Xi Lin ◽  
Qi Zhu ◽  
Haiyan Leng ◽  
Hongguang Yang ◽  
Tao Lyu ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Metal Hydride ◽  
Hydrogen Absorption ◽  
Particle Radius

Thermofluidynamic modelling of hydrogen absorption in metal hydride beds by using multiphysics software

2020 ◽  
Vol 45 (60) ◽  
pp. 34956-34971
Author(s):  
Fawzi Elhamshri ◽  
Muhammet Kayfeci ◽  
Ulaş Matik ◽  
Salaheldin Alous
Keyword(s):  
Metal Hydride ◽  
Hydrogen Absorption

Hydriding and Dehydriding Characteristics of As-Spun Nanocrystalline and Amorphous Mg20Ni10-xMnx (x = 0-4) Alloys

2011 ◽  
Vol 347-353 ◽  
pp. 3420-3424
Author(s):  
Yang Huan Zhang ◽  
Xiao Gang Liu ◽  
Le Le Chen ◽  
Hui Ping Ren ◽  
Guo Fang Zhang ◽  
...  
Keyword(s):  
Amorphous Phase ◽  
Hydrogen Absorption ◽  
Melt Spinning ◽  
Hydrogen Desorption ◽  
Absorption Capacity ◽  
Desorption Kinetics ◽  
Nanocrystalline And Amorphous ◽  
Cast Alloys ◽  
Mn Content ◽  
Kinetics Of

The nanocrystalline and amorphous Mg2Ni-type Mg20Ni10-xMnx (x = 0, 1, 2, 3, 4) alloys were synthesized by melt-spinning technique. The structures of the as-cast and spun alloys were characterized by XRD, SEM and HRTEM. The hydrogen absorption and desorption kinetics of the alloys were measured. The results show that the substitution of Mn for Ni, instead of changing the major phase Mg2Ni, leads to the formation of Mg and MnNi phases. No amorphous phase is detected in the as-spun Mn-free alloy, but the as-spun alloys substituted by Mn display the presence of an amorphous phase, suggesting that the substitution of Mn for Ni enhances the glass forming ability of the Mg2Ni-type alloy. The hydrogen absorption capacity of the as-cast alloys first increases and then decreases with the variation of the amount of Mn substitution. The hydrogen desorption capacity of the alloys markedly increases with growing Mn content.

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