Готові списки джерел за темами / Hydrogène – Solubilité

Добірка наукової літератури з теми "Hydrogène – Solubilité"

Автор: Grafiati
Опубліковано: 9 червня 2023

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Статті в журналах з теми "Hydrogène – Solubilité":

1

Sinha, Sneha, Chelsea Yang, Emily Wu, and William E. Acree. "Abraham Solvation Parameter Model: Examination of Possible Intramolecular Hydrogen-Bonding Using Calculated Solute Descriptors." Liquids 2, no. 3 (July 24, 2022): 131–46. http://dx.doi.org/10.3390/liquids2030009.

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Published solubility data for 4,5-dihydroxyanthraquinone-2-carboxylic acid dissolved in several organic solvents of varying polarity and hydrogen-bonding character are used to calculate the Abraham model solute descriptors. Calculated descriptor values suggest that 4,5-dihydroxyanthraquinone-2-carboxylic acid engages in intramolecular hydrogen formation between the two phenolic hydrogens and the proton acceptor sites (the lone electron pairs) on the neighboring quinone oxygen atom. Our study further shows that existing group contribution and machine learning methods provide rather poor estimates of the experimental-based solute descriptors of 4,5-dihydroxyanthraquinone-2-carboxylic acid, in part because the estimation methods to not account for the likely intramolecular hydrogen-bonds. The predictive aspect of the Abraham model is illustrated by predicting the solubility of 4,5-dihydroxyanthraquinone-2-carboxylic acid in 28 additional organic mono-solvents for which experimental data does not exist.
2

Yamanaka, Shinsuke, Takahiro Matsuura, and Masanobu Miyake. "Hydrogen Solubility in Molybdenum*." Zeitschrift für Physikalische Chemie 1, no. 1 (January 1992): 109–15. http://dx.doi.org/10.1524/zpch.1992.1.1.109.

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3

Yamanaka, Shinsuke, Takahiro Matsuura, and Masanobu Miyake. "Hydrogen Solubility in Molybdenum*." Zeitschrift für Physikalische Chemie 179, Part_1_2 (January 1993): 103–9. http://dx.doi.org/10.1524/zpch.1993.179.part_1_2.103.

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4

Reinertz, J., W. A. Oates, H. Wenzl, and T. Schober. "Hydrogen Solubility in NiAl*." Zeitschrift für Physikalische Chemie 183, Part_1_2 (January 1994): 99–107. http://dx.doi.org/10.1524/zpch.1994.183.part_1_2.099.

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5

Seta, Shoji, and Hirohisa Uchida. "Hydrogen solubility in LaNi5." Journal of Alloys and Compounds 231, no. 1-2 (December 1995): 448–53. http://dx.doi.org/10.1016/0925-8388(95)01874-3.

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6

Chen, Huasheng, Chao Liu, and Xiaoxiao Xu. "Molecular dynamic simulation of sulfur solubility in H2S system." International Journal of Modern Physics B 33, no. 08 (March 30, 2019): 1950052. http://dx.doi.org/10.1142/s0217979219500528.

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The elemental sulfur solubility in sour gas plays an important role in H2S-rich gas reservoir development and transportation. While the solubility of elemental sulfur in sour gas can be measured in macroscopical respect, the interaction of solid deposition is not clear at microscale. In this work, molecular dynamic simulation (MD) was adopted to predict the solubility of elemental sulfur in hydrogen sulfide at nanoscale. It is found that the results of new nanoscale solubility model are close to the reported experimental data. The average relative error of the solubility of elemental sulfur in hydrogen sulfide by using the new model is 11.05% compared with the experimental data. Therefore, the new model can be used to predict the solubility of elemental sulfur in hydrogen sulfide.
7

TRUSH, VASYL. "INFLUENCE OF HYDROGEN SATURATION ON CHARACTERISTICS OF ZIRCONIUM." Herald of Khmelnytskyi National University. Technical sciences 307, no. 2 (May 2, 2022): 159–68. http://dx.doi.org/10.31891/2307-5732-2022-307-2-159-168.

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The article presents a literature review on the effect of hydrogen saturation on the properties of zirconium alloys. Zirconium alloys are an indispensable structural material for the core of nuclear reactors. During operational loads, the interaction of zirconium materials with interstitial elements (oxygen, nitrogen, hydrogen) necessarily occurs. Zirconium shows the greatest affinity for hydrogen. One of the vulnerable zirconium elements is fuel rod tubes. The safe operation of a nuclear reactor depends on their integrity. In addition, it is fuel tubes that are most exposed to hydrogen. Therefore, the systematization of knowledge about the effect of hydrogen on the properties of zirconium tubes will make it possible to better predict their operational behavior. According to scientific literature data, depending on the volume of absorbed hydrogen, either a solid solution or zirconium hydrides can form. The dependence of the absorbed hydrogen zirconium on the dilution of the hydrogen medium and temperature is shown. The chemical composition of the zirconium alloy also affects the rate and amount of absorbed hydrogen. The effect of hydrogen on the mechanical properties of zirconium alloys is presented. The differences on the fracture surface after tensile tests at room temperature are shown depending on the amount of absorbed hydrogen. Data are presented that indicate that hydrogen atoms are located in octahedral or tetrahedral interstitial voids of a hexagonal close-packed zirconium lattice. It is shown that the thermal solubility of hydrogen in α-zirconium is extremely low, its value is ~6 at. % at the eutectoid transformation temperature, and at room temperature the solubility of α-Zr hydrogen does not exceed 1·10-5 wt. %. In high-temperature β-Zr, hydrogen dissolves up to ~50 at. %. It has been established that deterioration of the properties of zirconium elements of nuclear reactors during operation due to exposure to hydrogen is likely due to a number of factors: hydrogen embrittlement, the formation of large massive accumulations of hydrides and delayed hydride cracking. It is shown that the direction of arrangement of hydrides depends on the texture of the matrix and on the stresses present in the material that act during the formation of hydrides. It has been established that hydrogen can penetrate into a metal through an oxide film, diffusing, for example, along extended defects such as dislocations and grain boundaries. It is noted that the solubility of hydrogen in zirconium depends on other penetration elements already present in the metal, for example, the solubility of hydrogen in α-zirconium depends on the soluble oxygen in the metal matrix, which is confirmed by the reduced «Zr–O–H» ternary system.
8

Chen, Liang, Qian Wang, Wugui Jiang, and Haoran Gong. "Hydrogen Solubility in Pd3Ag Phases from First-Principles Calculation." Metals 9, no. 2 (January 24, 2019): 121. http://dx.doi.org/10.3390/met9020121.

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First-principles calculation was used to systematically investigate hydrogen solubility in Pd3Ag phases. It was found that the solubility of hydrogen in Pd3Ag phases was much greater than in face-centered cubic (FCC) Pd, suggesting that Ag atoms enhanced hydrogen solubility with respect to FCC Pd. In addition, the present calculation also revealed that the anti-site defect formation enthalpies of Pd3Ag were close to zero, and the values of vacancy were positive and large, which indicated that Pd3Ag distributed compactly. In the process of hydrogen separation, anti-site defects decreased the hydrogen solubility in the Pd3Ag phases, i.e., the ordered Pd3Ag phases bestowed excellent properties of H selectivity. The results presented not only explore the fundamental properties of Pd3Ag phases and their various potential applications, but also agree with experimental observations reported in the literature.
9

Watanabe, N., G. Zhang, Hiroshi Yukawa, Masahiko Morinaga, T. Nambu, K. Shimizu, S. Sato, K. Morisako, Yoshihisa Matsumoto, and Isamu Yasuda. "Hydrogen Solubility and Resistance to Hydrogen Embrittlement of Nb-Pd Based Alloys for Hydrogen Permeable Membrane." Advanced Materials Research 26-28 (October 2007): 873–76. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.873.

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The alloying effects of Pd on the hydrogen solubility and the resistance to hydrogen embrittlement are investigated for Nb-xmol%Pd-ymol%Zr (x=0~19; y=0, 1) alloys. The hydrogen solubility at 673 K is found to decrease with increasing Pd content in the alloys. Both pure Nb and Nb-Pd alloys possessed ductility in vacuum at 673 K. However, severe hydrogen embrittlement occurs in pure Nb when it is tested under the hydrogen pressure even as low as 0.01 MPa. In view of the small punch (SP) absorption energy, the addition of Pd into Nb improves the resistance to hydrogen embrittlement by decreasing the hydrogen solubility in the alloy, although brittle fracture is still observed in the Nb-15mol%Pd alloy tested under a hydrogen pressure of 0.015 MPa at 673 K.
10

Plyasov, A. A., V. V. Novikov, and Yu N. Devyatko. "Hydrogen Solubility in Zirconium Alloys." Physics of Atomic Nuclei 83, no. 9 (December 2020): 1328–38. http://dx.doi.org/10.1134/s1063778820090185.

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Статті в журналах Дисертації Книги

Дисертації з теми "Hydrogène – Solubilité":

1

Traisnel, Caroline. "Étude de la diffusion et de la solubilité de l’hydrogène en surface et subsurface du nickel monocristallin : approches numériques et expérimentales." Electronic Thesis or Diss., La Rochelle, 2022. http://www.theses.fr/2022LAROS033.

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Les surfaces métalliques sont au centre des mécanismes de fissuration par corrosion sous contrainte et de fatigue corrosion. Celles-ci s'avèrent être le lieu principal de l'initiation de l’endommagement des métaux, tout en faisant preuve d'une grande réactivité vis-à-vis de leur environnement. Agissant en portes d'entrée pour les solutés, comme l'hydrogène ou l'oxygène,vers le cœur de la matrice métallique, les surfaces jouent un rôle clé dans les processus de fragilisation par l'hydrogène (FPH). Afin d'identifier les états métallurgiques résistants à la FPH, une compréhension des interactions H-surface sous contrainte est nécessaire. En étudiant les mécanismes physiques élémentaires impliqués aux premiers stades de fatigue-corrosion, ces travaux de thèse visent à proposer un début d'évaluation de l'impact de l'apparition de défauts de surface dus à une sollicitation en fatigue(dislocations de surface, bandes de glissement, lacunes) sur la diffusivité locale apparente et solubilité de l'hydrogène près de la surface du nickel. La première étape de cette étude nécessite cependant d'identifier l'effet de l'orientation cristallographique des surfaces sur ces propriétés locales. Cette étude constitue la majorité de cette thèse. Pour cela, nous travaillons sur des surfaces monocristallines {100}, {110} et {111} du nickel non déformé en premier lieu, à la fois par approches numériques et expérimentales. Expérimentalement, un gradient de diffusion d'hydrogène est observé pour chaque orientation en chargeant des monocristaux de nickel en hydrogène avec une technique électrochimique pulsée. Contrairement aux techniques de perméation habituelles, cette technique potentiostatique en deux étapes permet de caractériser la mobilité de l'hydrogène à l'entrée de l'échantillon qui s’avère être le principal endroit de piégeage de l’hydrogène, et donc de fragilisation. Une corrélation entre les défauts émergents en surface et en subsurface (caractérisés par MO/AFM/TEM) et la diffusivité locale de l'hydrogène est ensuite discutée dans le cas de Ni{110}. En parallèle, des calculs à l'échelle atomique sont effectués (DFT + Phonons) afin de déterminer l'évolution des énergies libres de migration de l'hydrogène du voisinage des surfaces {100}, {110} et {111} vers le nickel massif. La solubilité locale de l'hydrogène est calculée et discutée en termes d'énergie d’origine élastique liée à la relaxation différenciée des atomes de surface pour les trois orientations. Une confrontation avec la théorie élastique met en évidence l'évolution des propriétés élastiques locales. Enfin, des calculs à plus grande échelle par potentiels empiriques (EAM) sont initiés pour étudier des systèmes plus complexes en ajoutant des défauts, tels que des marches de surface, amorçant l’analyse des interactions entre l'hydrogène et les défauts émergeant en surface lors d’une sollicitation en fatigue
Metallic surfaces are at the central place of stress corrosion cracking and corrosion fatigue mechanisms. These latter turn out to be the initiation site of materials damage, while exhibiting great reactivity to their environment. As they act as front doors for solutes, like hydrogen or oxygen, towards the bulk, surfaces play a key role in hydrogen embrittlement (HE) processes. In order to identify HE-tolerant metallurgical states, an understanding of H-surface interactions under stress is necessary. By investigating elementary physical mechanisms implied at the first stage of corrosion fatigue, this thesis work aims to propose a beginning in assessing the impact of the emergence of surface defects due fatigue stress (surface dislocations, slip bands, vacancies) on the apparent local diffusivity and solubility of hydrogen near the surface of nickel. The first step of this study requires however to identify the surfaces crystallographic orientation effect on these local properties, which is the raw material of this thesis. For this, we work on monocrystalline {100}, {110} and {111} surfaces of undeformed nickel at first sight, using both numerical and experimental approaches. Experimentally, a hydrogen diffusion gradient is observed for each orientation by charging nickel single crystals with a pulsed electrochemical technique. Conversely to usual permeation techniques, this double-step potentiostatic one enables the characterization of hydrogen mobility at the entrance side of the sample which was proven to be the main location for H-trapping and embrittlement. A correlation between emerging surface and subsurface defects (characterized by MO/AFM/TEM) according to the degree of cyclic deformation and the local hydrogen diffusivity is then discussed in case of Ni{110}. In parallel, calculations at the atomic scale are carried out (DFT + Phonons) in order to determine the evolution free energies of hydrogen migration from near the {100}, {110} and {111} surfaces towards the bulk. The local solubility of hydrogen is calculated and discussed in terms of lattice elastic distortion energy related to the differentiated relaxation of the surface atoms for the three orientations. A confrontation with elastic theory approach highlights the evolution of local elastic properties. Finally, bigger scales calculations through EAM are initiated to study more complex systems by adding defects, such as surface steps, giving a start for a reliable basis to interpret the interactions between hydrogen and part of the surface defects involved with a fatigue solicitation
2

Bouchard, Marc-Olivier, and Marc-Olivier Bouchard. "Nouvelle approche pour la mesure de la solubilité de l'hydrogène dans l'aluminium liquide." Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/24771.

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La présence d’hydrogène en solution dans l’aluminium liquide entraîne la formation de porosités une fois celui-ci solidifié. C’est pourquoi il est important de bien mesurer la quantité de gaz dissous dans le métal. La méthode de Sieverts, utilisée par d’autres expérimentateurs dans le passé, montre certaines faiblesses et une nouvelle méthode plus fiable et versatile est proposée afin de valider les résultats obtenus précédemment. Après plusieurs tests et améliorations au montage et à la méthodologie, des résultats prometteurs ont été obtenus. En fait, un phénomène attribuable à la dissolution de l’hydrogène dans l’aluminium a été observé. En faisant quelques hypothèses, ces résultats ont permis de valider le modèle mathématique en obtenant une valeur de la solubilité de l’hydrogène dans l’aluminium près de celle des autres expérimentateurs. Suite à ces essais, de nouvelles améliorations ont été apportées au montage et une nouvelle méthodologie de mesure est proposée pour les expérimentations futures.
La présence d’hydrogène en solution dans l’aluminium liquide entraîne la formation de porosités une fois celui-ci solidifié. C’est pourquoi il est important de bien mesurer la quantité de gaz dissous dans le métal. La méthode de Sieverts, utilisée par d’autres expérimentateurs dans le passé, montre certaines faiblesses et une nouvelle méthode plus fiable et versatile est proposée afin de valider les résultats obtenus précédemment. Après plusieurs tests et améliorations au montage et à la méthodologie, des résultats prometteurs ont été obtenus. En fait, un phénomène attribuable à la dissolution de l’hydrogène dans l’aluminium a été observé. En faisant quelques hypothèses, ces résultats ont permis de valider le modèle mathématique en obtenant une valeur de la solubilité de l’hydrogène dans l’aluminium près de celle des autres expérimentateurs. Suite à ces essais, de nouvelles améliorations ont été apportées au montage et une nouvelle méthodologie de mesure est proposée pour les expérimentations futures.
The presence of hydrogen in solution in liquid aluminium leads to the formation of porosities after the solidification. For this reason, a good measurement of the quantity of gas dissolve in the molten metal should be made. The Sieverts’ method, used by the precedents experimenters, shows some weaknesses and a new method more reliable and versatile is proposed to validate the results formerly obtained. After several tests and ameliorations to the measurement system, some promising results were obtained. A phenomenon that can be attributed to the dissolution of hydrogen in liquid aluminium was observed. By making some assumptions, these results were used to validate the mathematical model by obtaining a value of the solubility of hydrogen in aluminum near the other experimenters. Following that, new ameliorations were made to the system and that a new measurement methodology is proposed for the future experimentations.
The presence of hydrogen in solution in liquid aluminium leads to the formation of porosities after the solidification. For this reason, a good measurement of the quantity of gas dissolve in the molten metal should be made. The Sieverts’ method, used by the precedents experimenters, shows some weaknesses and a new method more reliable and versatile is proposed to validate the results formerly obtained. After several tests and ameliorations to the measurement system, some promising results were obtained. A phenomenon that can be attributed to the dissolution of hydrogen in liquid aluminium was observed. By making some assumptions, these results were used to validate the mathematical model by obtaining a value of the solubility of hydrogen in aluminum near the other experimenters. Following that, new ameliorations were made to the system and that a new measurement methodology is proposed for the future experimentations.
3

Clauzier, Stéphanie. "Etude de la solubilité de l’hydrogène dans des liquides confinés." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10285/document.

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L’adsorption des gaz dans les solides micro/mésoporeux et la solubilisation des gazdans les liquides sont des phénomènes physiques très bien connus. En revanche, lasolubilisation des gaz dans un liquide confiné à l’intérieur d’un solide (système hybride) estun domaine très peu étudié, malgré des applications importantes, notamment dans l’extractiondu pétrole, les ciments ou encore les réacteurs catalytiques triphasiques. Nous avons montréexpérimentalement que la solubilité du CO2 et H2 augmente quand la taille de pores du solideest de l’ordre du nanomètre. Un des objectifs de cette thèse était d’optimiser le couple solidesolvant(système hybride) et les conditions de température et de pression pour augmenter lestockage de H2 pour les applications de stockages. Dans le système Aérogel/éthanol à 50 barset 0°C, la solubilité de H2 est 8,5 fois supérieure à la solubilité mesurée dans le liquide seul,représentant une masse de 6,2g d’hydrogène stocké par kg de solide. Le second objectif étaitde comprendre les paramètres clefs de ce phénomène apparent de « sursolubilité » dans lessystèmes hybrides. En comparant différents solides poreux (zeolithes, MOF, MCM, silice),nous avons montré le rôle majeur des propriétés d’interfaces. Les phénomènes desolubilisation ont été modélisés à l’échelle moléculaire par GCMC et validéesexpérimentalement. Il apparait que le mécanisme de sursolubilisation provient d’unestructuration en couche des molécules de solvants en interactions avec les parois dumésopore
The adsorption of gases in micro/mesoporous materials and solubility of gases inliquids are physical phenomena well known. On the other hand, solubility of gases in liquidsconfined inside a solid (hybrid system) has not been entensively studied, despite the importantapplications such systems can have in the areas of oil extraction, cement and triphasiccatalytic reactors. We have shown experimentally that the solubility of CO2 and H2 increaseswhen the size of the pores of the solid is in the nanometer range. One of the objectives of thisthesis was to optimize the couple a solid and a solvent into a hybrid system and the conditionsin which to increase the H2 storage capacity. In an aerogel/ethanol hydrid system at 50 barand 0 ° C, the solubility of H2 is 8.5 times greater than the solubility measured in the singleliquid, representing a mass of 6.2 g of hydrogen stored per kg of solid. The second objectivewas to understand this apparent phenomenon of oversolubility and the key parameters in thehybrid systems. By comparing different porous solids (zeolites, MOFs, MCM-41 and silica),we have shown the major role of the properties of interfaces. The phenomena of solubilsationwas modelled by GCMC and experimentally validated. It appears that the mechanism ofoversolubilisation comes from structuring the solvent molecules in interactions with the wallsof the mesopore layered
4

Descamps, Cathy. "Etude de la capture du CO2 [dioxyde de carbone] par absorption physique dans les systèmes de production d'électricité basés sur la gazéification du charbon intégrée à un cycle combiné." Phd thesis, École Nationale Supérieure des Mines de Paris, 2004. http://pastel.archives-ouvertes.fr/pastel-00005506.

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La volonté de réduction des émissions de gaz à d'effet de serre est à l'origine de l'étude de la capture du CO2 dans les systèmes de production d'électricité à base de gazéification du charbon intégrée à un cycle combiné. Une étude comparative des procédés de capture de CO2 retenus dans la littérature (MEA-MDEA, AMP, N-Méthyl- Pyrrolidone et méthanol) a conduit au choix de l'absorption physique par le méthanol. La simulation du fonctionnement de l'IGCC avec capture de CO2 a été réalisée à l'aide du logiciel Aspen Plus
5

Sezgin, Jean-Gabriel. "Modélisation de la formation des décohésions dues à l’hydrogène dans l’acier 18MND5." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEM006/document.

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Les viroles en acier microallié 18MND5, destinées aux générateurs de vapeur, présentent une composition hétérogène à plusieurs échelles. Un écart au procédé de fabrication ou une teneur en hydrogène excessive, peuvent conduire à la formation des Décohésions Dues à l’Hydrogène. Ces DDH résultent de la désorption de l’hydrogène interne lors du refroidissement jusqu’à température ambiante. La pression interne n’étant pas mesurables expérimentalement, une modélisation du phénomène est requise. Afin de préciser les mécanismes sous-jacents, il est proposé un scénario de formation de ces défauts s’appuyant conjointement sur une expertise et la modélisation des processus de diffusion-désorption-propagation. Les observations ont révélé une corrélation entre les DDH, les zones ségrégées et les amas de MnS (sites préférentiels d’initiation). Un modèle de diffusion dans un milieu hétérogène a été proposé afin d’évaluer la pression interne associée. La pression maximale excède ainsi 8600 bar en considérant une loi d’Abel-Noble optimisée du gaz réel. Le couplage de ce modèle avec la mécanique de la rupture a permis de quantifier l’évolution des paramètres relatifs à la propagation (pression interne, taille finale, vitesse, …). Un scénario de formation des DDH industriel a ainsi pu être formulé sur la base d’une étude paramétrique. Bien que les simulations préliminaires corroborent le retour d’expérience, le modèle raffiné et la prise en compte du gonflement de la DDH semblent sous-estimer la cinétique. Le caractère multi-fissuré des amas de MnS (homogénéisation des propriétés mécaniques) associé à un critère de rupture à l’échelle locale permettrait d’ajuster ce modèle
Heat generators are manufactured from ingots of 18MND5 (A508cl3) low alloy steel and present composition heterogeneities at different scales. Under specific conditions (non-respect of guidelines or high initial content of H), Hydrogen Induced Cracks (HIC) may result from diffusion-desorption of internal hydrogen during cooling down to room temperature. Since neither hydrogen redistribution nor its internal pressure within cavities could be measured by experimental techniques, quantitative investigation is based on the modelling of related physical phenomena. A scenario of HIC formation, based on industrial feedback and modelling, has been proposed. A correlation between these defects, segregated areas and clusters of MnS (preferred initiation sites) has been revealed by expertise of HIC. A model of diffusion in heterogeneous alloys has then been proposed to assess the maximal pressure of H2 in such HIC. Simulation has shown that internal pressures above 860MPa are reached by considering an optimized Abel-Noble real gas behavior. The previous model has then been coupled to a failure mechanics procedure to characterize and quantify the crack growth parameters. Based on a parametric study, a scenario of HIC formation during the cooling has been proposed regarding process. Although results from preliminary simulations matched with feedback, the refined model based on the pressure induced elastic deformation of HIC has been developed but provided an underestimated kinetic of crack growth. Consequently, the multi-cracked nature of MnS clusters (homogenization of mechanical properties) and the updated local failure criterion appear to be a viable path to adjust predictions
6

Prillieux, Aurélien. "Hydrogen and water vapour effects on oxygen solubility and diffusivity in high temperature Fe-Ni alloys." Phd thesis, Toulouse, INPT, 2017. http://oatao.univ-toulouse.fr/18676/1/PRILLIEUX_Aurelien.pdf.

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It is a worldwide priority to reduce emissions of greenhouse gases such as CO2. One solution for reducing these emissions is to improve the efficiency of energy production units by increasing their operating temperature. However, in order to increase operating temperature, new austenitic materials based on the Fe-Ni-Cr system have to be designed. In addition, these materials need to exhibit good protection against high temperature oxidation, which is achieved by the formation of a slow growing chromium oxide or alumina scale on the metal. However, to predict the formation of a protective scale, knowledge of the oxygen permeability, the product of oxygen solubility and diffusivity, in the base alloy is required. The objective of this study is to measure the permeability, solubility and diffusivity of oxygen in Fe- Ni alloys at temperatures above 1,000°C. In order to obtain the best results, the formation of an external oxide layer during the experiment has to be avoided. To achieve this, the oxygen partial pressure was fixed at the Fe/FeO equilibrium pressure in all experiments. In addition, two types of atmospheres were used: one dry and one wet, in order to investigate the effect of water vapour on oxygen permeability, solubility and diffusivity. The dry atmosphere was achieved using the Rhines Pack technique. The samples were oxidised in vacuum-sealed quartz capsules, which contained a mixture of powdered iron and wüstite. The humid atmosphere was obtained by using H2/H2O gas mixtures with the appropriate water vapour to hydrogen ratio to fix oxygen partial pressure at the Fe/FeO equilibrium. The maximum oxygen solubility was found in pure iron, and decreased continuously with nickel additions to the alloy. The dependence of solubility on alloy composition is non-ideal, and cannot be predicted from simple models. Moreover, the presence of water vapour in the atmosphere seems to increase the solubility by a factor of 2 in alloys with nickel content lower than 80 at.% at temperatures near 1,000°C. However, at 1,150°C the solubility of the oxygen is independent of the environment. The oxygen permeability was determined by measuring the internal oxidation kinetics of Fe-Ni-Cr alloy. These kinetics were evaluated by measuring the internal oxidation zone depth by optical microscopy, or by continuous and discontinuous thermogravimetry. Results showed that the oxygen permeability exhibits the same variation with alloy composition as the oxygen solubility, independent of the atmosphere. In particular, no significant effect of water vapour on oxygen permeability values was observed. In the present study, the oxygen diffusion coefficient was also determined using permeability, in addition to the independent measurement of the oxygen solubility carried out in the present study. For temperature above 1,000°C, the variation of oxygen diffusion coefficient with the alloy composition is similar in all environments tested, and a maximum is observed for alloys with a nickel content of 40 at.%. However, for a given nickel content up to 60 at.%, the presence of water vapour in the atmosphere decreases the value of the oxygen diffusion coefficient by a factor of 2-3 at 1,000°C. In addition, this difference between diffusion coefficients measured in a dry and wet atmosphere increases as the temperature decreases. Overall, it was found that the water vapour has no effect on the way in which oxygen permeability, solubility and diffusivity vary with the alloy composition. However, the presence of water vapour in the environment appears to increase the oxygen solubility and decrease the oxygen diffusivity in iron-rich alloys, the effect being more significant at low temperatures. These results suggest further research into interactions between O, H and metal vacancies, particularly for temperature around 1,000°C and below, as the latter defect is thought to change the diffusion and solubility properties of interstitial species.
7

Miller, Allan Harvey 1968. "Predicting the solubility of hydrogen bonding aromatics." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/291667.

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The AQUAFAC (Aqueous Functional Group Activity Coefficients) method for predicting aqueous activity coefficients proposed by Myrdal et al. (1992) is expanded to include for hydrogen bonding groups: hydroxy, carboxy, nitro and amino. Activity coefficients can be used to estimate aqueous solubility. Using aqueous solubility data, from a number of sources, for a set of subsituted aromatic compounds, group or q values are derived. Group values have been generated for a number of substituents, none have included hydrogen bonding groups (Myrdal et al., 1992,1993). Q values are related to activity coefficients through the following relationship: log gammaw = Sigmaniqi where log gammaw is the log of the activity coefficient, qi is the group value subtituent i and ni is the group frequency. Ortho effects between hydrogen bonding groups is also examined. Intramoleculat hydrogen bonding involving carboxy substituted compounds, in this research, does appear to affect aqueous solubility.
8

Sargent, M. A. "The solubility of hydrogen in some commercial aluminium-lithium alloys." Thesis, Brunel University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234016.

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9

Brandberg, Jenny. "Solubility of hydrogen in slags and its impact on ladle refining." Licentiate thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4143.

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10

Hurtig, Jenny. "Solubility of hydrogen in slags and its impact on ladle refining." Doctoral thesis, KTH, Mikro-modellering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172462.

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In the present thesis a study of the mechanisms of hydrogen control pickup during ladle treatment was undertaken. Previous studies showed that the presence of hydroxyl ions in the ladle slag resulteds in hydrogen transfer from the slag back into the steel bath. The main focus of the present work was therefore to gain deeper knowledge of the ladle slag, its properties and impact on hydrogen concentration in the liquid steel. For this purpose a number of slag compositions were examined in order to clarify whether these slags were single liquids at 1858 K. 14 out of 27 compositions in the Al2O3-CaO-MgO-SiO2 system werewas completely melted, while the rest had solid shape present . These results were in disagreement with the existing phase diagram.   Water solubility measurements were carried out by employing a thermo gravimetric technique. The temperature was found to have negligible effect in the water solubilities. The experimental results showed that the water capacity values varied between 1·103 and 2·103 in the majority of the composition range. However, for compositions close to CaO saturation the water capacity value could reach higher than 3·103. The experimental determined water capacity was further used to develop a water capacity model for the quaternary slag system Al2O3-CaO-MgO-SiO2. The model was constructed by considering the effects of the binary interactions between the cations in the slag on the capacity of capturing hydroxyl ions. The model calculations agreed reasonably well with the experimental results as well as with the literature data.   The water capacity model was used in the last part of the present thesis in order to determine the major source for hydrogen pick-up of the steel after vacuum degassing but before casting. For this purpose, samples of slag and metal were taken at different stages ofduring ladle treatment at SSAB. Hydrogen increase after vacuum treatment was observed. Moisture contents of the industrial slag were analysed and the water capacities of the slags were calculated. It could be seen that the hydrogen increase was correlated to the amount of moisture in the slag and the water capacity. The study showed that the slag containing most water was also the heat having the largest hydrogen increase. The slag with most water had the highest water capacity. It could be concluded that the major source for hydrogen coming back into the steel was due to the slag-metal reaction. A tentative process model to predict the final contents of hydrogen and nitrogen after tundish process was attempted. More work is needed to improve the model.

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Книги з теми "Hydrogène – Solubilité":

1

Domańska, Urszula. Wpływ między- i wewnątrzcząsteczkowego wiązania wodorowego na efekty synergiczne rozpuszczalności. Warszawa: Wydawnictwa Politechniki Warszawskiej, 1987.

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2

Noble, E. G. Solubilities of bromide salts of aluminum, cobalt, lead, manganese, potassium, and sodium when sparged with hydrogen bromide. Pgh. [i.e. Pittsburgh] Pa: U.S. Dept. of the Interior, Bureau of Mines, 1988.

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3

Sargent, Margaret A. The solubility of hydrogen in some commercial aluminium-lithium alloys. Uxbridge: Brunel University, 1989.

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4

McCracken, C. G. The intrinsic and extrinsic solubility of hydrogen in aluminium-lithium based alloys. Uxbridge: Brunel University, 1994.

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5

Thompson, D. A. ITER Task T227 (1995): Solubility, diffusion and desorption of hydrogen isotopes in beryllium and tungsten. Mississauga, Ont: Canadian Fusion Fuels Technology Project, 1996.

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6

Thompson, D. A. ITER Task T26/28 (1995): Solubility, diffusion and desorption of hydrogen isotopes in potential fusion reactor ceramics. Mississauga, Ont: Canadian Fusion Fuels Technology Project, 1996.

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7

Noble, E. G. Solubilities of chloride salts of alkali and alkaline-earth metals when sparged with hydrogen chloride. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1985.

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8

Doyle, Mark Laurence. Order-disorder solid state transformations and hydrogen solubility in a range of palladium-yttrium solid solution alloys. Birmingham: University of Birmingham, 1989.

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9

Thompson, D. A. ITER task T26/28 (1994): Preliminary results on the solubility, diffusion and permeability of hydrogen isotopes in potentional fusion reactor ceramics. Mississauga, Ont: CFFTP, 1995.

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10

Smith, Deborah Anita. An examination of the dependence of the hydrogen solubility upon the structure and constitution of some palladium-cerium solid solution alloys. Birmingham: University of Birmingham, 1985.

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Частини книг з теми "Hydrogène – Solubilité":

1

Puls, Manfred P. "Solubility of Hydrogen." In The Effect of Hydrogen and Hydrides on the Integrity of Zirconium Alloy Components, 109–52. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4195-2_4.

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2

Schur, D. V., Z. A. Matysina, and S. Yu. Zaginaichenko. "Hydrogen Solubility in FCC Fullerite." In Hydrogen Materials Science and Chemistry of Carbon Nanomaterials, 25–44. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-2669-2_2.

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3

Shanabarger, Mickey R., Sankara N. Sankaran, and Anthony W. Thompson. "Hydrogen Solubility in Ti-24Al-11Nb." In Hydrogen Effects in Materials, 215–22. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118803363.ch19.

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4

Schur, Dmitry V., N. S. Anikina, O. Ya Krivuschenko, Svetlana Yu Zaginaichenko, G. A. Kazimov, A. D. Zolotarenko, M. A. Polischuk, N. F. Javadov, T. Nejat Veziroğlu, and Ayfer Veziroğlu. "Solubility of Fullerenes in Naftalan." In Black Sea Energy Resource Development and Hydrogen Energy Problems, 205–13. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6152-0_18.

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5

Flanagan, T. B., G. E. Biehl, J. D. Clewley, T. Kuji, and Y. Sakamoto. "Hydrogen Solubility in Ordered and Disordered Palladium Alloys." In Hydrogen in Disordered and Amorphous Solids, 341–50. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2025-6_28.

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6

Watanabe, N., G. Zhang, Hiroshi Yukawa, Masahiko Morinaga, T. Nambu, K. Shimizu, S. Sato, K. Morisako, Yoshihisa Matsumoto, and Isamu Yasuda. "Hydrogen Solubility and Resistance to Hydrogen Embrittlement of Nb-Pd Based Alloys for Hydrogen Permeable Membrane." In Advanced Materials Research, 873–76. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-463-4.873.

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7

Zaginaichenko, S. Yu, Z. A. Matysina, D. V. Schur, and V. A. Chumak. "Theoretical Study of Structural Transformations at Fullerit Hydrogenation. Hydrogen Solubility." In Hydrogen Materials Science and Chemistry of Metal Hydrides, 429–40. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0558-6_42.

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8

Zvyagintseva, A. V., and Y. N. Shalimov. "Increase of Solubility of Hydrogen in Electrolytic Alloys Ni–B." In Carbon Nanomaterials in Clean Energy Hydrogen Systems - II, 519–28. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0899-0_42.

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9

Neumann, Karsten, Bernd Friedrich, Klaus Krone, Jürgen Jestrabek, and Elmar Nosch. "Hydrogen in Aluminum Containing Copper Alloy Melts - Solubility, Measurement and Removal." In Continuous Casting, 13–19. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607331.ch2.

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10

Matysina, Z. A., S. Yu Zaginaichenko, D. V. Schur, and N. A. Shvachko. "Temperature Ferroelastic Phase Transition in Hydroxyapatite. Hydroxyl Solubility, Configuration Heat-Capacity, Hysteresis Effect, Elasticity Modulus." In Carbon Nanomaterials in Clean Energy Hydrogen Systems - II, 325–52. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0899-0_27.

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Тези доповідей конференцій з теми "Hydrogène – Solubilité":

1

Tosti, Silvano, Alfonso Pozio, Alessia Santucci, and Mirko Sansovini. "Hydrogen solubility and electrical resistivity measurements of hydrogenated Pb-Li." In 2013 IEEE 25th Symposium on Fusion Engineering (SOFE). IEEE, 2013. http://dx.doi.org/10.1109/sofe.2013.6635456.

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2

KHAN, A., and D. PETERSON. "Hydrogen permeation, diffusion and solubility in IN-100 and Waspaloy." In 26th Joint Propulsion Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-2683.

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3

Shiman, Oksana, Eric Tulk, and Mark R. Daymond. "Measurement of Hydride Precipitation and Dissolution Kinetics Using Synchrotron X-Rays." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63729.

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Structural components of nuclear reactors made from zirconium alloys are subject to degradation mechanisms associated with hydrogen pickup during their operating life. Even small amounts of hydrogen isotopes (∼tens of wt. ppm) can significantly reduce the material’s fracture toughness and make it susceptible to a sub-critical crack growth mechanism known as Delayed Hydride Cracking (DHC). The mitigation of potentially costly failures of these components requires assessments based upon not only the bulk concentration of hydrogen, but the concentration of hydrogen precipitated as hydrides, and in solution. The behaviour of the zirconium-hydrogen system near ∼100 ppm hydrogen concentration continues to be the subject of research, primarily due to its otherwise complex behaviour and critical role in nuclear plant operations. There is an anisotropic volumetric expansion associated with the precipitation of zirconium hydride, and this precipitation event results in plasticity in the surrounding matrix and compressive strain in the hydride phase. This leads to both a pronounced solubility hysteresis upon dissolution and precipitation, as well as variances in solubility behaviour depending on the prior thermal and mechanical history. In the present study, high-energy synchrotron x-ray diffraction is used to study the evolution of hydrogen solubility in Zr-2.5 wt% Nb pressure tube material with different hydrogen concentrations in situ during thermal cycling between 100 and 400°C. This technique provides the ability to directly measure the amount of hydride in a given sample at different temperatures, and to evaluate zirconium-hydrogen precipitation and dissolution kinetics.
4

Lufrano, J., P. Sofronis, and H. K. Birnbaum. "The Mechanics of Hydride Formation and Embrittlement." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0542.

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Abstract Transient hydrogen diffusion and hydride formation coupled with material deformation are studied in a hydride forming system. The concept of terminal solid solubility of hydrogen as affected by stress is described and the mode of hydrogen diffusion through the two-phase material (matrix+hydride) is discussed. Probabilistic precipitation of hydride is modeled in the neighborhood of a crack tip under mode I plane strain loading and a uniform initial hydrogen concentration below the stress free terminal solid solubility. A full transient finite element analysis allows for numerical monitoring of the development and expansion of the hydride zone. Information about the shape, size, and density of the hydride in the hydride zone is obtained. The mechanistic effects of the solute hydrogen and hydride formation on the stresses at the crack tip are analyzed and their consequence on the fracture toughness resistance of the material is calculated.
5

Opetubo, Oriyomi, Sunday Temitope Oyinbo, Peter Ozaveshe Oviroh, Ibitoye Ayotunde, and Tien-Chien Jen. "Investigation of Adsorption, Dissociation, and Hydrogen Diffusion Through V-Ni-Zr Alloys Surface for Hydrogen Purification: First Principle Method." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-96856.

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Abstract Hydrogen is an alternative source of fuel to replace fossil fuels. Its byproduct is water, and it is environmentally friendly. To meet the United Nations goal of zero greenhouse gas emissions by 2050, hydrogen generation and purification must be capable of meeting the annual demand for fossil fuel. Vanadium (V) is a potential material to replace Pd-based metals due to its high diffusion. However, due to its high solubility, it suffers severe hydrogen embrittlement. Moreso, alloying with vanadium, such as Nickel (Ni), has lowered its solubility. Hence, this study used the first principle calculation technique based on density functional theory (DFT) to investigate the Hydrogen (H) atom’s adsorption, diffusion, and permeability characteristics on the V-Ni-Zr alloy surface. The hydrogen diffusion path from the hollow site (HS) through the bridge site (BS) to the tetrahedral interstitial site (TS) was investigated. Because of its low activation energy, the material may be employed for H2 storage and purification by changing the alloy composition. Before hydrogen embrittlement occurs, we also look at the diffusion rate over time. This research can be used as a starting point for the experiment.
6

Kim, Young S., Sang B. Ahn, and Yong M. Cheong. "Initiation and Arrest of Delayed Hydride Cracking in Zr-2.5Nb Tubes." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-94062.

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Using Kim’s delayed hydride cracking (DHC) model, this study reanalyzes the critical temperatures for DHC initiation and arrest in Zr-2.5Nb tubes that had previously been investigated with Dutton and Puls’s DHC model. At temperatures over 180 °C along with a hydrogen concentration of over 15 ppm H, the DHC initiation in a CANDU Zr-2.5Nb tube was suppressed, which required a cooling or ΔT from the terminal solid solubility for dissolution (TSSD) temperatures. With the number of the thermal cycle increasing, the DHC initiation temperatures or Tcs gradually shifted towards the TSSD. At a hydrogen concentration as low as 7 ppm H and temperatures lower than 180 °C, a DHC initiation occurred at temperatures near the TSSD with little ΔT. Different DHC initiation temperatures with hydrogen concentrations are discussed in view of precipitation of hydrides in the zirconium matrix either by a cooling or by a stress-induced γ- to δ-hydride transformation. The DHC arrest temperatures were governed by the critical supersaturated hydrogen concentration or ΔC regardless of the thermal cycle treatment. By correlating the DHC cracking and arrest temperatures with the supersaturated hydrogen concentration or ΔC for the DHC cracking and arrest, we conclude that the ΔC arising from the hysteresis of the terminal solid solubility of hydrogen on a heat-up and on a cool-down is the driving force for the DHC.
7

Alhotan, Muhammad, Mojdeh Delshad, and Kamy Sepehrnoori. "Effect of Grid Resolution on Underground Hydrogen Storage Compositional Reservoir Simulation." In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213276-ms.

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Abstract Hydrogen is poised to play a critical role in the global transition to sustainable and securable energy. Exploration of Hydrogen energy technologies is gaining unprecedented momentum due to its promising potential as a low carbon energy storage technology. Hydrogen is also a versatile fuel with economy-scale applications in transportation and industrial processes. Among the challenges that arise from considering economy-scale hydrogen utilization is the large volume seasonal storage. While hydrogen has an energy mass density higher than gasoline, it requires an ample and secure storage medium due to its gaseous utilization form and low volumetric density. As such, the development of storage technologies such as Underground Hydrogen Storage (UHS) is necessary. As a sub-domain of gas reservoir engineering, UHS applications face similar challenges to those faced by other subsurface technologies in terms of understanding the geological substrata. Reservoir simulation offers an approach to improve our understanding of hydrogen behavior in geological reservoirs. However, as an emerging technology, best practices in simulating hydrogen storage in porous reservoirs is not fully understood in the literature. One key factor to consider is numerical grid size and its effect on simulation results. In this paper, the effect of numerical grid resolution on UHS simulations is investigated using a commercial compositional reservoir simulator. Additionally, a real field geological model is used to evaluate the grid resolution effect on hydrogen storage volume, reservoir pressure, cushion gas, working gas capacity, water production, hydrogen solubility in water, and residual trapping of hydrogen. The published measured hydrogen properties, relative permeability, and capillary pressure are incorporated in these simulations. Results indicate that grid size is highly influential to accurately model hydrogen migration during injection and production cycles. In addition, solubility quantification of hydrogen was found to be affected by grid resolution.
8

Jang, Jin-Seob, and Nak-Kwan Chung. "Measurement of the Hydrogen Permeability of Various Polymers for High Pressure Hydrogen Storage Vessels and Valves." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21210.

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Abstract We have been studied on the physical property evaluation in high-pressure hydrogen environment for components and materials used in hydrogen infrastructure such as hydrogen refueling station and hydrogen fuel cell vehicle for safe use and dissemination of hydrogen energy. Hydrogen is small and light and easily leaks out of storage containers or parts. For safety, it is important to measure the permeability of the material and parts for high pressure hydrogen vessel. We will present the measurement of hydrogen permeability of polymer materials used in hydrogen storage containers and O-rings. Hydrogen permeability was measured by differential pressure method, and the permeability of several polymers such as EPDM, NBR, FKM, and HDPE was measured. Their diffusivity could be calculated using the obtained permeability graph, and their solubility was also obtained. We will measure the permeability by changing the type and the amount of additives and fillers in polymers. We will also measure the change in permeability with various hydrogen pressure and temperature.
9

Wang, Gang, Gillian Elizabeth Pickup, Kenneth Stuart Sorbie, and Eric James Mackay. "Driving Factors for Purity of Withdrawn Hydrogen: A Numerical Study of Underground Hydrogen Storage with Various Cushion Gases." In SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209625-ms.

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Abstract The central objective of this study is to improve our current understanding of the hydrodynamic processes arising when hydrogen (H2) is stored in subsurface porous media. In this work, we compare the use of two cushion gases, namely carbon dioxide (CO2) and methane (CH4), for H2storage ina synthetic aquifer. The impacts of viscous instability, gravity segregation, capillary trapping, and CO2 solubility in water on the recovery performance are investigated in detail.In the context of H2 storage, wefocus on both the amount and the purity of the H2that is back produced. A series of very fine-scale numerical simulationswas performed in 2D vertical systems using a fully compositional simulator. A simple three-stage operation strategy (cushion gas injection, H2 injection and H2 production) was designed to trigger the flow behaviour of interest. Based onscaling theory, we analysed the impacts of various mechanisms on the H2 recovery performance, from viscous dominated to gravity dominated flow regimes. Viscous instability and permeability heterogeneity may strongly degrade the purity of the back produced H2. No matter whichgas (CO2 or CH4) is selected as the cushion gas, the less viscous H2 infiltrates the cushion gas, meaning that the displacement does not proceed in a piston-like fashion. In the viscous-dominated scenario, H2 may even bypass the cushion gas of CO2, which subsequently leads to early breakthrough of the cushion gas and thus a dramatic reduction in H2 purity during back production. However, this effect does not arise in the case with CH4 as cushion gas. On the other hand, in the gravity-dominated case, the less dense H2 accumulates above the cushion gas and there is no flow infiltration or bypassing occurring in cases studied here. Therefore, the overall H2recovery performance is much better in the gravity-dominated regime than that in the viscous dominated regime. Finally, we demonstrate that it is important to include the solubility of CO2 when used as cushion gas in aquifer systems. This isbecause CO2 dissolution in water may significantly reduce its gas volume and lead to early water breakthrough during back production.
10

Hitchcock, Dale, Timothy Krentz, Anastasia Mullins, Charles James, Qianhui Liu, Siyang Wang, Samruddhi Gaikwad, and Marek W. Urban. "Hydrogen Permeability of Self-Healing Copolymers for Use in Hydrogen Delivery Applications." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-84051.

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Abstract Safe and reliable fueling components are essential for large scale deployment of H2 fuel. Field data has shown that existing materials used in dispensing hoses do not meet current standards for component reliability. Currently modern copolymerization methods are under investigation to create a new platform for inner hose technologies using self-healable copolymers. Ideally these inexpensive self-healable copolymer inner layers will reduce the cost of H2 delivery hoses and extend their service life beyond 25,000 refills. In this work gas driven hydrogen permeability measurements were performed on a variety of self-healing copolymer membranes all of which have exhibited excellent self-healing properties in previous studies. Copolymers were prepared with Poly(2,2,2-trifluoroethyl methacrylate/n-butyl acrylate) [p(TFEMA/nBA)] and Poly(methyl methacrylate/nbutyl acrylate) [p(MMA/nBA)]. Measurements were performed through a range of temperatures and source pressures. Additionally, the effects of composition, copolymer ratio, and molecular weight on the hydrogen permeability, solubility, and diffusivity were all studied. As expected, hydrogen permeation through the samples is proportional to the source pressure and inversely proportional to the molecular weight of the polymer. In general, the self-healing copolymers exhibit hydrogen permeabilities consistent with literature data for similar elastomers. These results suggest this class of self-healable copolymers may be promising candidates for use as inexpensive inner layers in hydrogen dispensing hoses with extended service life.

Звіти організацій з теми "Hydrogène – Solubilité":

1

Pellenbarg, Robert E., and Kia Cephas. Water Solubility of BIS (2-Ethylhexyl) Hydrogen Phosphite. Fort Belvoir, VA: Defense Technical Information Center, April 1991. http://dx.doi.org/10.21236/ada234561.

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2

Park, J. H., G. Dragel, R. A. Erck, and D. L. Smith. Solubility of hydrogen in V-4Cr-4Ti and lithium. Office of Scientific and Technical Information (OSTI), April 1996. http://dx.doi.org/10.2172/270424.

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3

Kane, M. PERMEABILITY, SOLUBILITY, AND INTERACTION OF HYDROGEN IN POLYMERS- AN ASSESSMENT OF MATERIALS FOR HYDROGEN TRANSPORT. Office of Scientific and Technical Information (OSTI), February 2008. http://dx.doi.org/10.2172/927901.

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4

Kabadi, V. N. Improvement of hydrogen solubility and entrainment in hydrocracker feedstocks. Final technical report. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/515515.

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5

Allen, T. H. The solubility of hydrogen in plutonium in the temperature range 475 to 825 degrees centigrade. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/6291865.

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6

Kabadi, V. N. Improvent of hydrogen solubility and entrainment in hydrocracker feedstocks. Quarterly report, April 1 - June 30, 1996. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/465815.

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7

Park, J. H., R. Erck, and E. T. Park. Measurement of hydrogen solubility and desorption rate in V-4Cr-4Ti and liquid lithium-calcium alloys. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/543272.

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8

Kabadi, V. N. Improvement of hydrogen solubility and entrainment in hydrocracker feedstocks. Quarterly technical report, January 1, 1995--March 31, 1995. Office of Scientific and Technical Information (OSTI), July 1995. http://dx.doi.org/10.2172/83114.

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9

Jalal Abedi. THE IMPACT OF TRACE ADDITIVES ON THE APPARENT SOLUBILITY OF HYDROGEN IN HEAVY OIL AND RELATED FEEDSTOCKS AT LOW AND HIGH TEMPERATURES. Office of Scientific and Technical Information (OSTI), September 2002. http://dx.doi.org/10.2172/835238.

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10

Liaw, Shuh-Jeng. Automation of a hydrogen meter for use in coal liquefaction plant and for determination of the effect of aliphatic hydrocarbons on hydrogen solubility and mass transfer rate in coal liquid solvents. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/5341646.

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