The effects of gas mixtures on hydrogen permeation through Pd–Ag/V–Ni alloy composite membrane

Hulme, John; Komaki, M.; Nishimura, Chikashi; Gwak, Jihye

doi:10.1016/j.cap.2010.12.024

Cited by 16 publications

(7 citation statements)

References 24 publications

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“…A clean Pd membrane is indeed expected to exhibit diffusion-controlled kinetics at room temperature, 17 whereas a surface partially covered with impurities will slow down the desorption process. 18 In both cases, the measurements suggest high hydrogen coverage of the low-pressure surface. We utilised XPS to measure the as-cleaned Pd membrane at different p feed values to confirm this hypothesis.…”

Section: Proof Of Principle and System Performancementioning

confidence: 90%

Closing the pressure gap in x-ray photoelectron spectroscopy by membrane hydrogenation

Delmelle

Probst

Alberto

et al. 2015

Review of Scientific Instruments

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Comprehensive studies of gas-solid reactions require the in-situ interaction of the gas at a pressure beyond the operating pressure of ultrahigh vacuum (UHV) X-ray photoelectron spectroscopy (XPS). The recent progress of near ambient pressure XPS allows to dose gases to the sample up to a pressure of 20 mbar. The present work describes an alternative to this experimental challenge, with a focus on H2 as the interacting gas. Instead of exposing the sample under investigation to gaseous hydrogen, the sample is in contact with a hydrogen permeation membrane, through which hydrogen is transported from the outside to the sample as atomic hydrogen. Thereby, we can reach local hydrogen concentrations at the sample inside an UHV chamber, which is equipped with surface science tools, and this corresponds to a hydrogen pressure up to 1 bar without affecting the sensitivity or energy resolution of the spectrometer. This experimental approach is validated by two examples, that is, the reduction of a catalyst precursor for CO2 hydrogenation and the hydrogenation of a water reduction catalyst for photocatalytic H2 production, but it opens the possibility of the new in situ characterisation of energy materials and catalysts. 86, 053104 (2015) Closing the pressure gap in x-ray photoelectron spectroscopy by membrane hydrogenation Comprehensive studies of gas-solid reactions require the in-situ interaction of the gas at a pressure beyond the operating pressure of ultrahigh vacuum (UHV) X-ray photoelectron spectroscopy (XPS). The recent progress of near ambient pressure XPS allows to dose gases to the sample up to a pressure of 20 mbar. The present work describes an alternative to this experimental challenge, with a focus on H 2 as the interacting gas. Instead of exposing the sample under investigation to gaseous hydrogen, the sample is in contact with a hydrogen permeation membrane, through which hydrogen is transported from the outside to the sample as atomic hydrogen. Thereby, we can reach local hydrogen concentrations at the sample inside an UHV chamber, which is equipped with surface science tools, and this corresponds to a hydrogen pressure up to 1 bar without affecting the sensitivity or energy resolution of the spectrometer. This experimental approach is validated by two examples, that is, the reduction of a catalyst precursor for CO 2 hydrogenation and the hydrogenation of a water reduction catalyst for photocatalytic H 2 production, but it opens the possibility of the new in situ characterisation of energy materials and catalysts. C 2015 AIP Publishing LLC. REVIEW OF SCIENTIFIC INSTRUMENTS[http://dx

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Section: Proof Of Principle and System Performancementioning

confidence: 90%

Closing the pressure gap in x-ray photoelectron spectroscopy by membrane hydrogenation

Delmelle

Probst

Alberto

et al. 2015

Review of Scientific Instruments

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“…Without any filtration layer, this H 2 gas sensor cannot accurately distinguish between cross-sensitive gases and gas mixtures such as carbon monoxide (CO), water vapour and methane (CH 4 ). More importantly, CO is a highly toxic cross-sensitive gas for Pd catalysts, which causes a reduction in available dissociation sites on the Pd metal surface due to CO adsorption [83,84]. To address this issue, Lee et al in [85] reported that an H 2 sensor using a hybrid structure of Pd NP/single-layer graphene (SLG) coated with a polymer membrane achieved high selectivity towards H 2 .…”

Section: H → 2hmentioning

confidence: 99%

Recent Advances and Challenges of Nanomaterials-Based Hydrogen Sensors

et al. 2021

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Safety is a crucial issue in hydrogen energy applications due to the unique properties of hydrogen. Accordingly, a suitable hydrogen sensor for leakage detection must have at least high sensitivity and selectivity, rapid response/recovery, low power consumption and stable functionality, which requires further improvements on the available hydrogen sensors. In recent years, the mature development of nanomaterials engineering technologies, which facilitate the synthesis and modification of various materials, has opened up many possibilities for improving hydrogen sensing performance. Current research of hydrogen detection sensors based on both conservational and innovative materials are introduced in this review. This work mainly focuses on three material categories, i.e., transition metals, metal oxide semiconductors, and graphene and its derivatives. Different hydrogen sensing mechanisms, such as resistive, capacitive, optical and surface acoustic wave-based sensors, are also presented, and their sensing performances and influence based on different nanostructures and material combinations are compared and discussed, respectively. This review is concluded with a brief outlook and future development trends.

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“…Fortunately, the inhibition by CO was reversible via the treatment in hydrogen for 30 min. [15] In addition to N 2 , CO 2 , and CO, the studies of H 2 permeation degradation due to the effects of CH 4 [14], H 2 S [12], and steam [16] have also received some attention. The studies of Pd-based membranes in binary gas mixtures are summarized in Table I [8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The inhibition effect of N 2 on H 2 permeation was attributed to the formation of nitrogen‐containing species (NH x , x = 0–2) which blocked the active sites on Pd surface for H 2 diffusion. Hulme et al demonstrated the negative effect of CO 2 on H 2 permeability through Pd‐Ag coated V‐Ni composite membranes and the increased influence of CO 2 on hydrogen permeability with increasing CO 2 concentration. The competitive adsorption of CO 2 on hydrogen adsorption sites led to the decline of H 2 permeation rate.…”

Section: Introductionmentioning

confidence: 99%

Permeation characteristics of hydrogen through palladium membranes in binary and ternary gas mixtures

Chen

Lin

Hsun

et al. 2017

Int. J. Energy Res.

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Summary The permeances of two palladium (Pd) membranes in pure H2, binary and ternary gas mixtures are investigated experimentally. With 10% of gas impurities (N2, CO2, or CO) in H2, the profiles of dimensionless permeance suggest that H2 permeation rate is lessened by approximately 50% to 90%, and the permeance reduced by the gas impurities is ranked as CO > CO2 > N2. By introducing a parameter of permeance resistance, which is the reciprocal of permeance, the permeance resistance in a ternary gas mixture can be predicted from the summation of individual permeance resistances in binary gas mixtures, revealing no synergistic effect exhibited from the interaction of contaminants. At least 75% and up to 100% of H2 in the gas mixtures can be recovered in the membrane system, and the maximum H2 recovery develops at the H2 partial pressure difference of 2 or 3 atm. In the Arrhenius‐type equation describing the relationship between the permeance and temperature, the activation energy is between approximately 2 and 18 kJ mole−1. In general, the permeances of the membranes in gas mixtures, especially in ternary gas mixtures, are more sensitive to temperature when compared with those in pure H2, stemming from lower activation energy exhibited. Copyright © 2017 John Wiley & Sons, Ltd.

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The effects of gas mixtures on hydrogen permeation through Pd–Ag/V–Ni alloy composite membrane

Cited by 16 publications

References 24 publications

Closing the pressure gap in x-ray photoelectron spectroscopy by membrane hydrogenation

Closing the pressure gap in x-ray photoelectron spectroscopy by membrane hydrogenation

Recent Advances and Challenges of Nanomaterials-Based Hydrogen Sensors

Permeation characteristics of hydrogen through palladium membranes in binary and ternary gas mixtures

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