Lamp Processing of the Surface of PdCu Membrane Foil: Hydrogen Permeability and Membrane Catalysis

2021 ◽  
Vol 57 (8) ◽  
pp. 781-789
Author(s):  
E. Yu. Mironova ◽  
A. I. Dontsov ◽  
N. B. Morozova ◽  
S. V. Gorbunov ◽  
V. M. Ievlev ◽  
...  
Keyword(s):  
Hydrogen Permeability ◽  
Membrane Catalysis ◽  
Lamp Processing

On the Hydrogen Permeability and Adhesion of TiN/Ti Coatings Produced on Zr–1% Nb Alloy by Vacuum Ion-Plasma Methods

2020 ◽  
Vol 14 (5) ◽  
pp. 929-934
Author(s):  
Zhang Le ◽  
N. N. Nikitenkov ◽  
V. S. Sypchenko ◽  
O. S. Korneva ◽  
E. B. Kashkarov ◽  
...  
Keyword(s):  
Hydrogen Permeability ◽  
Ion Plasma ◽  
Plasma Methods

Hydrogen Permeability and Diffusivity in Nickel and Ni-Base Alloys

CORROSION ◽  
1983 ◽  
Vol 39 (5) ◽  
pp. 174-181 ◽  
Author(s):  
R. M. Latanision ◽  
M. Kurkela
Keyword(s):  
Hydrogen Permeability

scholarly journals Quantitative Evaluations of Hydrogen Diffusivity in V-X (X = Cr, Al, Pd) Alloy Membranes Based on Hydrogen Chemical Potential

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 67
Author(s):  
Asuka Suzuki ◽  
Hiroshi Yukawa
Keyword(s):  
Nearest Neighbor ◽  
Chemical Potential ◽  
Hydrogen Permeability ◽  
First Principle ◽  
Hydrogen Diffusivity ◽  
Hydrogen Atoms ◽  
First Principle Calculations ◽  
Blocking Effects ◽  
Pd Alloy ◽  
Quantitative Evaluations

Vanadium (V) has higher hydrogen permeability than Pd-based alloy membranes but exhibits poor resistance to hydrogen-induced embrittlement. The alloy elements are added to reduce hydrogen solubility and prevent hydrogen-induced embrittlement. To enhance hydrogen permeability, the alloy elements which improve hydrogen diffusivity in V are more suitable. In the present study, hydrogen diffusivity in V-Cr, V-Al, and V-Pd alloy membranes was investigated in view of the hydrogen chemical potential and compared with the previously reported results of V-Fe alloy membranes. The additions of Cr and Fe to V improved the mobility of hydrogen atoms. In contrast, those of Al and Pd decreased hydrogen diffusivity. The first principle calculations revealed that the hydrogen atoms cannot occupy the first-nearest neighbor T sites (T1 sites) of Al and Pd in the V crystal lattice. These blocking effects will be a dominant contributor to decreasing hydrogen diffusivity by the additions of Al and Pd. For V-based alloy membranes, Fe and Cr are more suitable alloy elements compared with Al and Pd in view of hydrogen diffusivity.

scholarly journals Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 282
Author(s):  
Leandri Vermaak ◽  
Hein W. J. P. Neomagus ◽  
Dmitri G. Bessarabov
Keyword(s):  
Hydrogen Permeability ◽  
Gas Mixtures ◽  
Open Circuit ◽  
Hydrogen Separation ◽  
Proton Exchange ◽  
Limiting Current ◽  
Separation Performance ◽  
Separation And Purification ◽  
Irreversible Damage ◽  
Temperature Range

This paper reports on an experimental evaluation of the hydrogen separation performance in a proton exchange membrane system with Pt-Co/C as the anode electrocatalyst. The recovery of hydrogen from H2/CO2, H2/CH4, and H2/NH3 gas mixtures were determined in the temperature range of 100–160 °C. The effects of both the impurity concentration and cell temperature on the separation performance of the cell and membrane were further examined. The electrochemical properties and performance of the cell were determined by means of polarization curves, limiting current density, open-circuit voltage, hydrogen permeability, hydrogen selectivity, hydrogen purity, and cell efficiencies (current, voltage, and power efficiencies) as performance parameters. High purity hydrogen (>99.9%) was obtained from a low purity feed (20% H2) after hydrogen was separated from H2/CH4 mixtures. Hydrogen purities of 98–99.5% and 96–99.5% were achieved for 10% and 50% CO2 in the feed, respectively. Moreover, the use of proton exchange membranes for electrochemical hydrogen separation was unsuccessful in separating hydrogen-rich streams containing NH3; the membrane underwent irreversible damage.

Measurement of hydrogen permeability of pure Nb and its alloys by electrochemical method

2005 ◽  
Vol 404-406 ◽  
pp. 257-260 ◽  
Author(s):  
K. Komiya ◽  
Y. Shinzato ◽  
H. Yukawa ◽  
M. Morinaga ◽  
I. Yasuda
Keyword(s):  
Electrochemical Method ◽  
Hydrogen Permeability

Hydrogen permeability and erosion behavior of W–Pd bimetallic systems

2006 ◽  
Vol 81 (1-7) ◽  
pp. 375-380 ◽  
Author(s):  
G.P. Glazunov ◽  
A.A. Andreev ◽  
D.I. Baron ◽  
R.A. Causey ◽  
A. Hassanein ◽  
...  
Keyword(s):  
Hydrogen Permeability ◽  
Erosion Behavior ◽  
Bimetallic Systems

Hydrogen permeability of a nickel alloy after high-temperature holding in technical helium

1990 ◽  
Vol 25 (6) ◽  
pp. 610-612
Author(s):  
Yu. I. Belyakov ◽  
Yu. I. Zvezdin ◽  
E. V. Zagainova ◽  
Yu. V. Peretyagin
Keyword(s):  
High Temperature ◽  
Nickel Alloy ◽  
Hydrogen Permeability
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