A Review for Consistent Analysis of Hydrogen Permeability through Dense Metallic Membranes

Suzuki, Asuka; Yukawa, Hiroshi

doi:10.3390/membranes10060120

Cited by 30 publications

(25 citation statements)

References 47 publications

(154 reference statements)

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“…The PCT curves in Figure 2 , Figure 3 and Figure 4 were used to quantify the PCT factors ( f PCT ) in Equation (1) under the conditions listed in Table 2 . A detailed explanation of the way to quantify f PCT is given elsewhere [ 27 ]. Figure 7 , Figure 8 and Figure 9 present the relationship between normalized hydrogen flux ( J·L ) and f PCT for V-Cr, V-Al, and V-Pd alloys.…”

Section: Resultsmentioning

confidence: 99%

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

Suzuki

Yukawa

2021

Membranes

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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.

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Section: Resultsmentioning

confidence: 99%

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

Suzuki

Yukawa

2021

Membranes

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“…It is known that the hydrogen flux and the hydrogen permeation coefficient can be estimated precisely only for given conditions. Therefore, for predicting the hydrogen flux, the apparent gas permeability is useful to quantify for certain operating regime [ 56 , 57 ]. The catalyst–membrane assembly in the CMR has been tested under many different flow rates ( Table 3 , experiments No.1 and Nos.2–5), and actual fluid dynamics may affect an overall permeability considerably.…”

Section: Methodsmentioning

confidence: 99%

Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

et al. 2021

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The performance of catalytic membrane reactors (CMRs) depends on the specific details of interactions at different levels between catalytic and separation parts. A clear understanding of decisive factors affecting their operational parameters can be provided via mathematical simulations. In the present paper, main results of numerical studies of ethanol steam reforming, followed by downstream hydrogen permeation through an asymmetric supported membrane, are reported. The membrane module consists of a thin selective layer supported on a substrate with graded porous structure. One-dimensional isothermal reaction–transport model for the CMR has been developed, and its validation has been carried out by using performance data from a lab-scale reactor with a disk-shaped membrane. Simulations demonstrate the model’s capabilities to analyze local concentrations gradients, as required to provide accurate estimates of the relationship between structure–property–performance. It was shown that transport properties of multilayer asymmetric membranes are highly related to the structural properties of each single layer.

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“…Given that hydrogen is a very small molecule with a high degree of permeability through various materials and that its selective detection is difficult to achieve, the synthesis of sensitive material for sensors with improved performance is still a challenge [ 73 , 74 , 75 ].…”

Section: Synthesis Methodsmentioning

confidence: 99%

Synthesis Methods of Obtaining Materials for Hydrogen Sensors

Constantinoiu

Viespe

2021

Sensors

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The development of hydrogen sensors has acquired a great interest from researchers for safety in fields such as chemical industry, metallurgy, pharmaceutics or power generation, as well as due to hydrogen’s introduction as fuel in vehicles. Several types of sensors have been developed for hydrogen detection, including resistive, surface acoustic wave, optical or conductometric sensors. The properties of the material of the sensitive area of the sensor are of great importance for establishing its performance. Besides the nature of the material, an important role for its final properties is played by the synthesis method used and the parameters used during the synthesis. The present paper highlights recent results in the field of hydrogen detection, obtained using four of the well-known synthesis and deposition methods: sol-gel, co-precipitation, spin-coating and pulsed laser deposition (PLD). Sensors with very good results have been achieved by these methods, which gives an encouraging perspective for their use in obtaining commercial hydrogen sensors and their application in common areas for society.

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A Review for Consistent Analysis of Hydrogen Permeability through Dense Metallic Membranes

Cited by 30 publications

References 47 publications

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

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

Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

Synthesis Methods of Obtaining Materials for Hydrogen Sensors

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