The Kinetics of Hydrogen Absorption-Desorption by Metals

1981 ◽  
pp. 329-343 ◽  
Author(s):  
M. A. Pick
Keyword(s):  
Hydrogen Absorption ◽  
Kinetics Of

Kinetics of hydrogen absorption/desorption in TC21 alloy

2010 ◽  
Vol 490 (1-2) ◽  
pp. 562-567 ◽  
Author(s):  
Xiaoli Wang ◽  
Yongqing Zhao ◽  
Yaoqi Wang ◽  
Hongliang Hou ◽  
Weidong Zeng
Keyword(s):  
Hydrogen Absorption ◽  
Kinetics Of

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.

Kinetics of Hydrogen Absorption, Desorption And Permeation of Metals

CORROSION ◽  
1958 ◽  
Vol 14 (12) ◽  
pp. 34-38 ◽  
Author(s):  
T. G. OWE BERG
Keyword(s):  
Experimental Data ◽  
Reaction Mechanisms ◽  
Hydrogen Absorption ◽  
Hydrogen Gas ◽  
Acid Solutions ◽  
Dilute Acid ◽  
Energy Diffusion ◽  
Dissolved Hydrogen ◽  
Kinetics Of ◽  
Absorption Of Hydrogen

Abstract The reaction mechanisms for the absorption of hydrogen by metals from moist hydrogen gas and dilute acid solutions, for the desorption from metals of dissolved hydrogen in the presence of water and for hydrogen solubility and permeation under those conditions are discussed. Their kinetics are also given. Formulae are derived for rates and equilibria. These are compared with experimental data. The migration of H atoms in the metal is concluded to be associated with zero or nearly zero activation energy. Diffusion is rapid enough to maintain almost uniform distribution of H atoms in the metal during absorption and desorption under ordinary conditions. 3.8.4

Kinetics of Hydrogen Absorption of Tantalum Between 500 and 700 K

1980 ◽  
Vol 71 (2) ◽  
pp. 85-89
Author(s):  
Hirohisa Uchida ◽  
Eckehard Fromm
Keyword(s):  
Hydrogen Absorption ◽  
Kinetics Of

Kinetics of hydrogen absorption in the intermetallic Zr(Al0.2Fe0.8)2

1991 ◽  
Vol 177 (2) ◽  
pp. 183-191 ◽  
Author(s):  
N. Bronfman ◽  
J. Bloch ◽  
M.H. Mintz ◽  
D. Sarussi ◽  
I. Jacob
Keyword(s):  
Hydrogen Absorption ◽  
Kinetics Of

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.

scholarly journals Effect of NaH/MgB2 ratio on the hydrogen absorption kinetics of the system NaH + MgB2

2014 ◽  
Vol 39 (10) ◽  
pp. 5030-5036 ◽  
Author(s):  
Claudio Pistidda ◽  
Daphiny Pottmaier ◽  
Fahim Karimi ◽  
Sebastiano Garroni ◽  
Agnieszka Rzeszutek ◽  
...  
Keyword(s):  
Hydrogen Absorption ◽  
Absorption Kinetics ◽  
Kinetics Of
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