Diffusion and permeation of deuterium in palladium-silver at high temperature and pressure

Hickman, R.G.

doi:10.1016/0022-5088(69)90182-9

Cited by 47 publications

(19 citation statements)

References 11 publications

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“…Although this is theoretically correct given the assumptions, permeability and solubility studies of H 2 -D 2 gas mixtures show that this relationship predicts values greater than measured experimentally [3][4][5]9]. To explain experimental data, Hickman empirically proposed a linear rule of mixtures for the solubility [3], such that the total isotope concentration has the form…”

Section: Two-component Gas Systemmentioning

confidence: 88%

“…Consequently, K will be approximately independent of isotope in metals [10] that do not have a strong affinity for hydrogen and that do not have microstructural sites that strongly trap hydrogen or its isotopes. On the other hand, a relatively small isotope effect on solubility has been reported in strong hydride formers such as palladium [3][4][5][6], as well as in stainless steel [1]. In order to keep our analysis general, we will therefore assume that K H 5 K D .…”

Section: Two-component Gas Systemmentioning

confidence: 99%

“…To explain experimental data, Hickman empirically proposed a linear rule of mixtures for the solubility [3], such that the total isotope concentration has the form…”

Section: Two-component Gas Systemmentioning

confidence: 99%

“…The solubility of hydrogen and its isotopes in metals from mixtures of these gases has also been studied in the literature, applying empirical relationships to model equilibrium dissolution of hydrogen isotopes. In particular, Hickman assumes that mixtures of hydrogen and deuterium gases behave as a one-component gas with an effective solubility constant that follows a linear mixing rule [3]; this assumption has been propagated in the literature [4][5][6][7][8][9] without consideration of the fundamental thermodynamics of dissolution. In the following presentation, we use classical thermodynamics to describe equilibrium dissolution of hydrogen and deuterium in metals from the gas phase and compare these results to empirical relationships from the literature.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Solubility of hydrogen and its isotopes in metals from mixed gases

Marchi

Somerday

Larson

et al. 2008

Journal of Nuclear Materials

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Section: Two-component Gas Systemmentioning

confidence: 88%

Section: Two-component Gas Systemmentioning

confidence: 99%

“…To explain experimental data, Hickman empirically proposed a linear rule of mixtures for the solubility [3], such that the total isotope concentration has the form…”

Section: Two-component Gas Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Solubility of hydrogen and its isotopes in metals from mixed gases

Marchi

Somerday

Larson

et al. 2008

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…The diffusion and solubility of deuterium in palladiumsilver alloys were investigated in [12][13][14]. In [15,16], it was evidenced that isotope effect in some phenomena, evident in Pd-H(D), gradually disappears with increasing percentage of Ag in the Pd-Ag-H(D) system.…”

Section: Intoductionmentioning

confidence: 99%

The diffusion of hydrogen and deuterium through self-stressed Pd77Ag23 membrane

Dudek¹

2005

Journal of Alloys and Compounds

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Diffusion coefficient of hydrogen in a Pd‐Ag membrane: Effect of hydrogen solubility

1995

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The permeabilities of hydrogen through a Pd,,-Ag,, membrane have been measured at temperatures ranging from 423 to 573 K and under hydrogen pressure differences ranging from 69 to 256 kPa. From the available literature solubility data a neural network model has been developed in order to simulate the variation of the hydrogen content in the alloy as a function of pressure and temperature. Then, from steady state permeability measurements and calculated solubilities, the diffusion coefficients of hydrogen have been computed. At a given temperature, the diffusion coefficient has been found to decrease with the hydrogen content (0.1 I n = H/M s 0.37). A simple relation is then suggested to predict the variation of the diffusion coefficient on both temperature and hydrogen content. To account for the variation of the diffusion coefficient with n, the integration of Fick's law of diffusion has been performed numerically, resulting in non-linear profile of hydrogen content through the membrane under steady state permeation.On a mesurk la permkabilitk de I'hydrogtne dans une membrane de Pd,5-Ag2S h des temp6ratures comprises entre 423 et 573 K et h des differences de pression d'hydrogtne variant de 69 h 256 P a . A partir des donnks de solubilitk de la litttrature scientifique, on a mis au point un modtle de rkseau neuronal afin de simuler la variation de la teneur en hydrogtne dans I'alliage en fonction de la pression et de la temp&ature. Puis, h partir de mesures de permkabilitk h l'ktat permanent et de calculs de solubilitks, on a calculk par ordinateur les coefficients de diffusion de I'hydroghe. On a observk qu'h une temp6rature donnke le coefficient de diffusion diminuait avec la teneur en hydrogtne (0,l 5 n = H/M 5 0,37). Une relation simple est ensuite suggkrke pour praire la variation du coefficient de diffusion par rapport h la temp6rature et la teneur en hydrogtne. Afin de tenir compte de la variation du coefficient de diffusion avec n, la loi de diffusion de Fick a ktk intkgrke numkriquement. Le rksultat est un profil non linkaire de la teneur en hydrogtne dans la membrane dans des conditions de permkation h l'ktat permanent.Keywords: diffusion of hydrogen, Pd-Ag membrane, hydrogen permeation, hydrogen solubility. alladium-silver membranes are well known for their

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Diffusion and permeation of deuterium in palladium-silver at high temperature and pressure

Cited by 47 publications

References 11 publications

Solubility of hydrogen and its isotopes in metals from mixed gases

Solubility of hydrogen and its isotopes in metals from mixed gases

The diffusion of hydrogen and deuterium through self-stressed Pd77Ag23 membrane

Diffusion coefficient of hydrogen in a Pd‐Ag membrane: Effect of hydrogen solubility

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