Literatura científica selecionada sobre o tema "Alliages de stockage d'hydrogène"
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Artigos de revistas sobre o assunto "Alliages de stockage d'hydrogène"
Piarristeguy, Andrea, Pierre Noé e Françoise Hippert. "Verres de chalcogénures pour le stockage de l’information". Reflets de la physique, n.º 74 (dezembro de 2022): 58–63. http://dx.doi.org/10.1051/refdp/202274058.
Texto completo da fonteZlotea, Claudia. "Nouveaux matériaux pour le stockage de l’hydrogène - Alliages métalliques multi-élémentaires hydrurables". Innovations en matériaux avancés, maio de 2022. http://dx.doi.org/10.51257/a-v1-in403.
Texto completo da fonteSouici, Mounir, e Atika Roustila. "Rôle de l’hydrogène sur la microstructure et de la température sur les propriétés électroniques du nickel pur (Ni)". Journal of Renewable Energies 12, n.º 3 (26 de outubro de 2023). http://dx.doi.org/10.54966/jreen.v12i3.157.
Texto completo da fonteTeses / dissertações sobre o assunto "Alliages de stockage d'hydrogène"
Lefèvre, Gauthier. "Propriétés physico-chimiques de nouveaux matériaux en couches minces pour le stockage d'hydrogène". Thesis, Artois, 2018. http://www.theses.fr/2018ARTO0406.
Texto completo da fonteHydrogen storage is probably the last lock facing the development of fuel cells system.Hydrogen is a non-harmful, non-polluting that can be used as an energy vector, allowing to produce fossil fuel free electricity efficiently and releasing only water.It could trigger the next technological and green revolution, marking the end of environmental concerns related to energy.Hydrogen is the most energetic gas. These double-edged caracteristics makes it attractive and unsafe at the same time. Solid state storage can be seen as a solution in spite of a moderate hydrogen uptake and a poor desorption process.In this context, research of new materials with enhanced physico-chemical properties is desirable and represent the aim of this work.This thesis is an investigation study. On the one hand, with the help of efficient theoretical structural prediction systems, an exploration of the infinite possibilities offered by metal alloys has been performed. On the other hand, pulsed laser deposition of metal thin films has been implemented to make use of its benefits.The present theoretical study has highlighted the influence of external strains on stability and emergence of alloys in numerous binary systems. In addition, a search for potential hydrides was carried out. Informations obtained are encouraging the use of similar prediction schemes in order to identify new systems.From metallic thin films made by pulsed laser ablation, deposition difficulties and disparities in procedures have been put forward. Nonetheless, singular morphologies have been achieved by this process, opening new insights for designing novel materials
Zeaiter, Ali. "Caractérisation et modélisation du comportement des alliages TiFe dédiés au stockage solide d'hydrogène. : Application à l'amélioration des performances d'un réservoir à hydrures métalliques". Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD007/document.
Texto completo da fonteHe environmental and economic problems caused by the use of petroleum products and the scarcity of these fossil fuels have led to the search for alternative sources of energy, which are renewable and respectful of the environment. Many of these sources are intermittent and require storage solutions. Hydrogen gas appears as a good candidate for this function. The hydrogen element, abundant in nature, has in its gaseous form a calorific value of 140 MJ / kg, i.e. 2.5 times that of gasoline. The 'hydrogen' sector is based on 3 pillars: production, storage, distribution and use. The storage of hydrogen is traditionally carried out by compression, under pressures ranging from a few bars to several hundreds, and by liquefaction at 20 K. The low density of these two types of storage (42 and 70 kgH2 / m3) associated with serious problems of safety and mechanical design, make solid storage in metal alloys particularly relevant for some applications. This solution favors the development of safe, compact design tanks with a high density of 120 kgH2/m3for TiFe alloys, for example. This type of hydride has been retained in this work because it has operating conditions of temperatures and pressures that are relatively close to ambient conditions, and also because it does not contain rare earth elements. The aim of this study is to characterize and model the hydriding/dehydriding behavior of the TiFe0.9Mn0.1 alloy, in order to improve its performance when it is integrated into a storage system. We first tried to characterize the alloy TiFe0.9Mn0.1 in powder form by describing it morphologically, chemically and thermodynamically. Then, two strategies of improvement were tested, the first one based on a mechanical treatment by planetary ball milling, the second considers a thermochemical treatment at given temperature and duration. Both strategies accelerated the process of powder activation, but the planetary ball milling significantly impaired the apparent desorption kinetics. The thermo-chemical treatment did not degrade the equilibrium domains and thus did not have an adverse effect on the reaction kinetics. The two most important parameters of this treatment, temperature and holding time, have been optimized. Other parameters remain to be refined.In addition to this experimental characterization, we have undertaken to describe the hydriding / dehydriding reaction macroscopically. The model allows to account for the thermodynamic response of the hydride within a reservoir. This work presents the results obtained on a tank containing 4 kg of TiFe0.9Mn0.1 powder when different hydrogen loading / unloading scenarios are considered: (i) loading / unloading under constant pressure, (ii) loading / unloading under an initial dose ( Method of Sievert), iii) loading / unloading under inlet or outlet flux of hydrogen. For each scenario, the effect of the coupling with a heat exchange system on the filling / emptying times is analyzed and optimal operating conditions are proposed. Finally, a sensitivity study using the Morris method is presented, and the most influential parameters of the model on the reaction rates are identified. The design of a solid hydrogen storage system requires a good understanding of the macroscopic as well as the microscopic aspects of the hydriding reaction and therefore requires further research to find new directions for improving its performance
Ponthieu, Marine. "Nouveaux matériaux riches en Mg pour le stockage d’hydrogène : composés Mg6Pd1-xMTx (MT = Ni, Ag, Cu) massifs et nanoconfinés et nanocomposites MgH2-TiH2". Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1139/document.
Texto completo da fonteThis thesis is dedicated to the study of novel magnesium-rich compounds for solid state hydrogen storage. The aim is to destabilize Mg hydride and accelerate its sorption kinetics by alloying and nanostructuration. The first family of compounds concerns the Mg6Pd1-xTMx (TM = Ni, Ag, Cu) pseudo-binary phases. Their structural properties and the effects of Pd substitution have been studied by X-ray diffraction, scanning electron microscopy and electron microprobe analyses. Their thermodynamics and kinetics of hydrogenation have been determined by solid-gas reaction. Different hydrogenation mechanisms take place depending on the substituting element. The stability of the metal-hydrogen system is altered by the nature of the phases formed during hydrogenation reaction. Thus, metal to hydride transformation is characterized by at least two absorption plateau pressures. The pressure of the first plateau is similar to that of Mg/MgH2 while the second one occurs at higher pressure. The enthalpy and entropy of reaction are determined to quantify the destabilizing effect of Pd by TM substitution. Best desorption kinetics are found for the Ni containing alloy thanks to the catalytic effect of the Mg2NiH4 phase formed on hydrogenation. The second approach aims to combine alloying with nanostructuration effects. Nanoparticles of Mg6Pd as small as 3 nm are confined into nanoporous carbon matrix. By comparing their hydrogenation properties with those of the bulk alloy, we demonstrate that not only the (de)hydrogenation kinetics are much faster for the nanoparticles, but also that their hydrided state is destabilized. Finally, MgH2-TiH2 nanocomposites were synthesized by mechanical milling under reactive atmosphere. The addition of a catalyst (TiH2) and Mg nanostructuration allow strongly accelerating the sorption kinetics of hydrogen in Mg. To understand the role of the TiH2 phase on the outstanding kinetics of these nanocomposites, their structural properties have been determined by X-ray and neutron diffraction. The existence of a coherent interface between Mg and TiH2 phases is of major importance to facilitate H-mobility within the nanocomposite. Furthermore, it is shown that the TiH2 inclusions inhibit the Mg/MgH2 grain growth, thus maintaining the composites nanostructure during their cycling
Ponthieu, Marine, e Marine Ponthieu. "Nouveaux matériaux riches en Mg pour le stockage d'hydrogène : composés Mg6Pd1-xMTx (MT = Ni, Ag, Cu) massifs et nanoconfinés et nanocomposites MgH2-TiH2". Phd thesis, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-00939180.
Texto completo da fonteLiu, Yuchen. "Synthesis, structural characterization and electrochemical hydrogen storage properties of LaNi5 and La4MgNi19 alloys prepared by mechanical alloying". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCA004.
Texto completo da fonteToday's world is facing the imminent depletion of fossil fuels and serious environmental problems, and it is urgent to find clean and renewable energy sources. Hydrogen energy, as a clean energy source, is a potential candidate. In a hydrogen economy based on hydrogen energy, hydrogen storage is the biggest obstacle limiting its development. Metal hydrides have attracted attention due to their safety and high hydrogen storage properties. The first generation of commercial hydrogen storage alloy LaNi5-based alloy has excellent hydrogen storage performance and has been widely used in various fields. However, due to its low hydrogen storage capacity, it is difficult to meet the requires of the European Union for hydrogen storage materials. Scientists often use a single optimization method, such as element substitution, new synthetic routes, surface optimization, etc. However, few articles report optimization methods that combine the two methods.In this work, first principles were used to screen out the best element Cr to substitute Ni. Mechanical alloying was used to synthesize LaNi5 alloy and LaNi4Cr alloy. The micromorphology and phase composition of different samples produced with different ball milling parameters were characterized by SEM and XRD tests. The hydrogen storage performance of the sample was then tested, and the gaseous hydrogen storage performance and electrochemical performance of the sample were obtained. The hydrogen storage properties of all the above samples are compared with each other, and the results reflect the effectiveness of the combination of mechanical alloying and element substitution methods for the optimization of LaNi5.In addition, another optimization method of LaNi5 alloy was also carried out, that is, combining it with AB2 phase to form La4MgNi19 alloy. A total of 6 sets of parameters with different ball milling times and different precursors were used to synthesize La4MgNi19 alloy. The phase composition and hydrogen storage properties of all samples were obtained and compared with the hydrogen storage properties of LaNi4Cr. The results show that the hydrogen storage performance of La4MgNi19 alloy is better than that of LaNi5 alloy, but slightly worse than that of LaNi4Cr alloy.Finally, with the help of simulation software, the parameters of the LaNi4Cr alloy were introduced into the proven hydrogen storage tank model to explore the performance of this alloy in the hydrogen storage tank. After exploring the effects of different parameters on the hydrogen storage tank, water pipes were added to adjust the heat exchange. The results show that hydrogen storage tanks filled with LaNi4Cr have excellent performance
Huang, Liwu. "Élaboration, caractérisation et propriétés de stockage d'hydrogène électrochimique des alliages : Mg2Ni1-xMnx (x = 0, 0.125, 0.25, 0.375) et Mg2-xAlxNi (x = 0, 0.25) + 5 wt.% MWCNTs préparés par mécanosynthèse". Phd thesis, Université de Technologie de Belfort-Montbeliard, 2012. http://tel.archives-ouvertes.fr/tel-00720661.
Texto completo da fonteCampesi, Renato. "Synthèse, caractérisation et étude des propriétés thermodynamiques d'hydrogénation de nanocomposites matériaux poreux / métaux-alliages". Phd thesis, Université Paris-Est, 2008. http://tel.archives-ouvertes.fr/tel-00461689.
Texto completo da fonteNguyen, Julien. "Stockage électrochimique d'hydrogène dans le carbure de titane". Limoges, 2013. https://aurore.unilim.fr/theses/nxfile/default/3ef7b178-91cc-4a1d-9d54-d5d078de92db/blobholder:0/2013LIMO4023.pdf.
Texto completo da fonteThis work deals with the feasibility of the electrochemical hydrogen insertion into the substoichiometric titanium carbides TiCx (0. 5 ≤ x ≤ 1) obtained by conventional reactive sintering (natural and hot pressing), and under the form of thin films, as obtained by magnetron reactive sputtering. The electrochemical hydrogen insertion in this material strongly depends on several parameters : (i) the elaboration process ; (ii) the crystalline structure ; and (iii) the stoichiometry of the carbide. The carbides TiCx obtained by hot pressing with x lower or equal to 0. 70 present an ordered crystalline structure where the (111) carbon plans are partially empty, allowing the hydrogen insertion into the material. On the contrary, the carbides prepared by reactive sintering at high temperature (2100°C) do not allow the hydrogen insertion whatever the carbide stoichiometry, because of the disorder of the carbon vacancies inside the crystalline structure. Nevertheless, it is possible to order these carbon vacancies by annealing at low temperature (730°C), this treatment rendering again the carbon plans (111) partially empty, and so, allowing the hydrogen to penetrate inside the titanium carbide with a diffusion coeffcient estimated at 1. 2 X 10-13 cm2. S-1 in TiC0. 60. The electrochemical reaction of oxidation of the titanium carbide was also studied, and it is demonstrated that TiC oxidizes into TiO2 accompanied by a CO2 release
Langohr, David. "Étude du stockage d'hydrogène par adsorption dans des carbones nanostructurés". Phd thesis, École Nationale Supérieure des Mines de Paris, 2004. http://pastel.archives-ouvertes.fr/pastel-00001383.
Texto completo da fonteLangohr, David. "Etude du stockage d'hydrogène par adsorption dans des carbones nanostructurés". Paris, ENMP, 2004. http://www.theses.fr/2004ENMP1249.
Texto completo da fonteLivros sobre o assunto "Alliages de stockage d'hydrogène"
Schillmoller, C. M. Nickel-containing alloys in hydrofluoric acid, hydrogen fluoride, and fluorine. Toronto, Ont: Nickel Development Institute, 2020.
Encontre o texto completo da fonteCompany, International Nickel. Corrosion resistance of nickel and nickel-containing alloys in hydrochloric acid, hydrogen chloride and chlorine (CEB-3). Toronto, Ont: Nickel Institute, 2020.
Encontre o texto completo da fonte