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Membranes
Special Issues
Recent Advances in Hydrogen Permeable Metal Membranes
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Recent Advances in Hydrogen Permeable Metal Membranes

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Inorganic Membranes".

Deadline for manuscript submissions: closed (15 April 2021) | Viewed by 12546

Special Issue Editors

Prof. Hiroshi Yukawa

E-Mail Website
Guest Editor
Graduate School of Engineering, Nagoya University, Nagoya, Japan
Interests: hydrogen permeable metal membranes; alloy design: pure hydrogen production
Prof. Yoshihisa Matsumoto

E-Mail Website
Guest Editor
National Institute of Technology, Oita College, Maki, Oita 870-0152, Japan
Interests: mechanical properties of metallic materials; hydrogen-permeable metal membranes; pure hydrogen production

Special Issue Information

Dear colleagues,

Some metal and alloy membranes exhibit a hydrogen permeation ability. H2 molecules dissociate into H atoms on the catalytic surface of the membrane. H atoms, the lightest small element, dissolve into the metal membrane, occupy the interstitial space in the crystal lattice, and diffuse very fast downstream. Owing to this fundamental dissolution and diffusion mechanism, in which only hydrogen can pass through the dense metallic membranes without pores, the so-called “absolute selectivity of hydrogen” can be achieved. Applications for this selectivity include hydrogen ultra-purification, membrane reactors for effective hydrogen production, chemical reactors that supply active hydrogen atoms, and hydrogen sensing devices.

Great progress has been made in the field of hydrogen-permeable metal membranes over past two decades. Interesting physical and mechanical properties have been found for both Pd-based and non-Pd-based metal membranes, and our fundamental understanding of them has been furthered. With this new knowledge, technological innovations are expected in the field of hydrogen permeable metal membranes. For example, non-Pd alloy membranes with enhanced resistance to hydrogen embrittlement have been designed and developed, and attempts have been made to apply these membranes to large-scale hydrogen separation devices.

The aim of this Special Issue is to provide comprehensive coverage on the “Recent Advances in Hydrogen-Permeable Metal Membranes”, particularly focusing on the new insights from recent findings and their applications. Original research papers on experimental, theoretical, and computational approaches as well as review articles are welcome.

Prof. Hiroshi Yukawa
Prof. Yoshihisa Matsumoto
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Membranes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrogen separation
  • hydrogen purification
  • hydrogen production
  • Pd-based alloy
  • non-Pd-based alloy

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Published Papers (3 papers)

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Research

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20 pages, 6098 KiB  
Article
Quantitative Evaluations of Hydrogen Diffusivity in V-X (X = Cr, Al, Pd) Alloy Membranes Based on Hydrogen Chemical Potential
by Asuka Suzuki and Hiroshi Yukawa
Membranes 2021, 11(1), 67; https://doi.org/10.3390/membranes11010067 - 18 Jan 2021
Cited by 4 | Viewed by 2945
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Recent Advances in Hydrogen Permeable Metal Membranes)
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16 pages, 4314 KiB  
Article
Analysis for Reverse Temperature Dependence of Hydrogen Permeability through Pd-X (X = Y, Ho, Ni) Alloy Membranes Based on Hydrogen Chemical Potential
by Asuka Suzuki and Hiroshi Yukawa
Membranes 2020, 10(6), 123; https://doi.org/10.3390/membranes10060123 - 16 Jun 2020
Cited by 9 | Viewed by 3089
Abstract
It is generally understood that the hydrogen permeability of Pd-Ag alloy membranes declines with decreasing temperature. However, recent studies have revealed that the hydrogen permeability of Pd-Ag alloy membranes inversely increases at a certain temperature range and reaches a peak. The peak behavior [...] Read more.
It is generally understood that the hydrogen permeability of Pd-Ag alloy membranes declines with decreasing temperature. However, recent studies have revealed that the hydrogen permeability of Pd-Ag alloy membranes inversely increases at a certain temperature range and reaches a peak. The peak behavior reflects the shape of pressure-composition isotherms (PCT curves). In order to elucidate the relationship between the reverse temperature dependence of hydrogen permeability and the PCT curves, the hydrogen permeability of pure Pd and Pd-X (X = Ho, Y, and Ni) alloy membranes were investigated. The pure Pd and Pd-5 mol%Ni alloy membranes, in which the α-α’ phase transition occurs, exhibits more significant peak behaviors than Pd-5 mol%Ho, Pd-5 mol%Y, and Pd-23 mol%Ag alloy membranes, in which the α-α’ phase transition is suppressed. Large differences in hydrogen solubility, at the hydrogen pressures above and below the plateau region or the inflection point, make the peak behaviors more significant. It is revealed that the peak temperature can be roughly predicted by the hydrogen pressure at the plateau regions or the inflection points in the PCT curves. Full article
(This article belongs to the Special Issue Recent Advances in Hydrogen Permeable Metal Membranes)
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Review

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22 pages, 4925 KiB  
Review
A Review for Consistent Analysis of Hydrogen Permeability through Dense Metallic Membranes
by Asuka Suzuki and Hiroshi Yukawa
Membranes 2020, 10(6), 120; https://doi.org/10.3390/membranes10060120 - 10 Jun 2020
Cited by 29 | Viewed by 5746
Abstract
The hydrogen permeation coefficient (ϕ) is generally used as a measure to show hydrogen permeation ability through dense metallic membranes, which is the product of the Fick’s diffusion coefficient (D) and the Sieverts’ solubility constant (K). However, [...] Read more.
The hydrogen permeation coefficient (ϕ) is generally used as a measure to show hydrogen permeation ability through dense metallic membranes, which is the product of the Fick’s diffusion coefficient (D) and the Sieverts’ solubility constant (K). However, the hydrogen permeability of metal membranes cannot be analyzed consistently with this conventional description. In this paper, various methods for consistent analysis of hydrogen permeability are reviewed. The derivations of the descriptions are explained in detail and four applications of the consistent descriptions of hydrogen permeability are introduced: (1) prediction of hydrogen flux under given conditions, (2) comparability of hydrogen permeability, (3) understanding of the anomalous temperature dependence of hydrogen permeability of Pd-Ag alloy membrane, and (4) design of alloy composition of non-Pd-based alloy membranes to satisfy both high hydrogen permeability together with strong resistance to hydrogen embrittlement. Full article
(This article belongs to the Special Issue Recent Advances in Hydrogen Permeable Metal Membranes)
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