Non-Pd BCC alloy membranes for industrial hydrogen separation

Dolan, Michael D.

doi:10.1016/j.memsci.2010.06.068

Cited by 251 publications

(166 citation statements)

References 211 publications

(245 reference statements)

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“…The proposed model is adapted to the experimental conditions and the data range for alloys based on V group metals with high hydrogen permeability, in particular, data for vanadium alloys which are presented in [2][3][4]. We fix T = 673 K, = 0.05 cm, µ(T ) = 2.474…”

Section: Numerical Modelling Of the Penetration Experimentsmentioning

confidence: 99%

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Estimation of hydrogen permeability parameters by the results of a ‘cascade’ penetration experiment

Zaika

Rodchenkova

2018

J. Phys.: Conf. Ser.

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Abstract. High-purity hydrogen is required for clean energy and a variety of chemical technology processes. Different alloys, which may be well-suited for use in gas-separation plants, were investigated by measuring specific hydrogen permeability. One had to estimate the parameters of diffusion and sorption to numerically model the different scenarios and experimental conditions of the material usage (including extreme ones), and identify the limiting factors. This paper presents a nonlinear model of fast hydrogen permeability in accordance with the specifics of the experiment and the parametric identification algorithm. IntroductionStudies on the interaction of hydrogen isotopes with structural materials are mainly necessitated by problems in the energy industry (including hydrogen one) [1] and metal protection from hydrogen corrosion. Different alloys, which may be well-suited for use in gas-separation plants, were investigated by measuring specific hydrogen permeability. One had to estimate the parameters of diffusion and sorption to numerically model the different scenarios and experimental conditions of the material usage (including extreme ones), and identify the limiting factors. The limiting factors are diffusion processes as well as physical and chemical phenomena at the surface. The transfer parameters depend on the technological features of material batch production. It is therefore unreasonable to target at 'tabular data'. Instead, effective algorithms of solving the inverse problem of parametric identification are necessary. The model matches the method of hydrogen permeability and takes into account only the main factors for the membrane filtering problem. This research is based on the article [2] and on the experimental data [3].

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Section: Numerical Modelling Of the Penetration Experimentsmentioning

confidence: 99%

“…The model matches the method of hydrogen permeability and takes into account only the main factors for the membrane filtering problem. This research is based on the article [2] and on the experimental data [3]. …”

mentioning

confidence: 99%

Estimation of hydrogen permeability parameters by the results of a ‘cascade’ penetration experiment

Zaika

Rodchenkova

2018

J. Phys.: Conf. Ser.

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“…5 Recently, there has been a great demand for the development of new hydrogen permeable alloys to reduce the material cost as well as to improve the hydrogen permeability. [6][7][8][9][10][11] Nb-based and V-based alloys are promising materials for hydrogen permeable membrane to be substituted for currently used Pd-based alloys. This is because they are less expensive and possess higher hydrogen permeability than Pd-based alloys.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10][11] However, a brittle fracture likely occurs during the operation under high pressure H 2 gas atmosphere which impedes the practical use of these alloy membranes. 6,12 Recently, the mechanical properties of niobium (Nb) and vanadium (V) membranes in hydrogen gas atmosphere at high temperature have been investigated by the in situ small punch (SP) test method. 13,14 It is found that a ductile-to-brittle transition occurs drastically at the hydrogen concentration around 0.2-0.25 (H/M) for both Nb and V membranes.…”

Section: Introductionmentioning

confidence: 99%

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

2016

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A consistent description of the hydrogen permeation through metal membrane based on hydrogen chemical potential proposed has been explained in detail. The hydrogen flux is proportional to the PCT factor, f PCT , consistently, which reflects the shape of the pressure-composition-isotherm (PCT curve) of the material. In addition, in view of the PCT factor, f PCT , and the ductile-to-brittle transition hydrogen concentration, DBTC, a concept for alloy design with high hydrogen permeability and strong resistance to hydrogen embrittlement has been proposed. In this concept, it is important to design alloy composition with appropriate PCT curve under the given pressure and temperature condition. As an example, V-9 mol% Al alloy has been designed, which exhibits high hydrogen flux without brittle fracture under given condition. Thus, the new consistent description is useful not only for the understanding of the hydrogen permeation property but also for the alloy design.

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“…Therefore, nickel supported vanadium membrane has prevented hydrogen embrittlement using the V-Ni composite or alloy phase 7) .…”

Section: Introductionmentioning

confidence: 99%

Effects of Nickel Supports on Hydrogen Permeability of Vanadium based Membrane

Cho¹,

Choi²,

Jung³

et al. 2013

Transactions of the Korean hydrogen and new energy society

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>> The separation of hydrogen depends on porosity, diffusivity and solubility in permeation membrane.Dense membrane is always showing a solution diffusion mechanism but porous membrane is not showing. Therefore, porous membrane has a good hydrogen flux due to pore is carried out transferred media. This mechanism is named as the Knudsen diffusion. Hydrogen molecules or hydrogen atoms are diffused along pore that is a mean free path. In this study, complex layer hydrogen permeation membrane was fabricated by hot press process. And then, it was evaluated and calculated to relationship between hydrogen permeability and membrane porosity.

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Non-Pd BCC alloy membranes for industrial hydrogen separation

Cited by 251 publications

References 211 publications

Estimation of hydrogen permeability parameters by the results of a ‘cascade’ penetration experiment

Estimation of hydrogen permeability parameters by the results of a ‘cascade’ penetration experiment

Consistent description of hydrogen permeation through metal membrane based on hydrogen chemical potential and its application to alloy design

Effects of Nickel Supports on Hydrogen Permeability of Vanadium based Membrane

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