Effect of Boundary Conditions on the Hydrogen Absorption in a Metal Hydride Reactor

2018 ◽  
Author(s):  
Bachir DADDA ◽  
Allal BABBOU ◽  
Rida ZARRIT ◽  
Youcef BOUHADDA ◽  
Said ABBOUDI
Keyword(s):  
Boundary Conditions ◽  
Metal Hydride ◽  
Hydrogen Absorption

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

scholarly journals Absorption of Hydrogen in the HBond©9000 Metal Hydride Tank

2018 ◽  
Vol 6 (11) ◽  
pp. 15-20
Author(s):  
Lukas Toth ◽  
Tomas Brestovic ◽  
Natalia Jasminska
Keyword(s):  
Specific Heat ◽  
Present Article ◽  
Metal Hydride ◽  
Hydrogen Absorption ◽  
Release Kinetics ◽  
Hydrogen Desorption ◽  
Intermetallic Alloy ◽  
Gas Pressure ◽  
Hydrogen Release ◽  
Absorption Of Hydrogen

The present article describes the measurements of hydrogen absorbed into an intermetallic alloy. The process of hydrogen absorption into a metal hydride tank is accompanied with generating heat that must be removed during the process. If the tank is not cooled, the gas pressure rapidly increases and even with a small amount of the stored hydrogen the pressure exceeds the permissible value. By contrast, during hydrogen desorption it is required to supply the same amount of specific heat to avoid a significant decrease in pressure which would result in a decrease in hydrogen release kinetics.  

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