Applications of Hydrides

Sandrock, G.

doi:10.1007/978-94-011-0111-0_17

Cited by 5 publications

(2 citation statements)

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“…This so-called isotope effect has raised considerable interest in both fundamental [5] and applied research, for applications such as hydrogen isotope separation and storage [6]. The isotope effect is commonly quantified by comparing the measured formation pressures of the hydride, deuteride and tritide.…”

Section: Introductionmentioning

confidence: 99%

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Bourgeois¹,

Crivello²,

Cénédèse³

et al. 2018

J. Phys.: Condens. Matter

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The present study focuses on the impact of the vibrational frequencies on the thermodynamic behavior of hydrides, deuterides and tritides, using high scale harmonic phonon calculations based on first-principle calculations. 115 MH hydrides were considered, for [Formula: see text] with M among 30 metallic elements. The results were found to be in good agreement with the available experimental data and pointed out trends on the evolution of the hydride zero point energy as a function of the crystal structure and the host metal nature. Based on this information, the vibration contribution to the formation enthalpy was deduced. This contribution is responsible for the differences between the enthalpies and therefore pressures of formation of the hydride, deuteride and tritide compounds. This so-called 'isotope effect' is experimentally observed but has never been studied by large scale calculations. A straightforward method has been developed allowing to quantify the isotope effect at non zero temperature. It explains the experimentally observed relative stability of hydride, deuteride and tritide compounds. As a major achievement, a new phenomenon was highlighted, which has never been anticipated, consisting in an inversion of the isotope effect when the temperature increases.

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Section: Introductionmentioning

confidence: 99%

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Bourgeois¹,

Crivello²,

Cénédèse³

et al. 2018

J. Phys.: Condens. Matter

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“…In the year 1988, Solovey 21 considered a method to deal with the advancement of the metal hydride hydrogen compressors for different applications depending on the thermodynamic study. In the years 1994 and 1997, Sandrock 22 and Dantzer 23 presented far-reaching reviews on different applications of metal hydrides for both laboratory models as well as commercialised systems. The prototypes of different applications like hydrogen storage system, hydrogen purification, hydrogen compressor, heat pumps and batteries are discussed.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of La₀_.₉Ce₀_.₁Ni₅ alloy for the development of single‐stage thermally driven sorption hydrogen compressor

Gupta

Sharma

2020

Intl J of Energy Research

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Summary In this study, La0.9Ce0.1Ni5 alloy is characterised to investigate the performance of a single‐stage thermally driven sorption hydrogen compressor (TDSHC). The pressure‐concentration isotherm (PCI) properties of La0.9Ce0.1Ni5 alloy are measured through Sievert's Apparatus, and the thermodynamic properties are estimated by constructing van't Hoff plots at different temperature ranges between 20°C and 140°C. The effects of an increase in operating temperature on hydrogen storage capacity as well as on thermodynamic properties and the corresponding effects on TDSHC performance are studied. It is observed that the hydrogen storage capacity decreased, whereas reaction enthalpy increased, with an increase in operating temperature. It is also observed that the equilibrium pressure increased dramatically with an operating temperature; therefore, this alloy is employed, in this study, for the development of TDSHC. The proposed TDSHC operates at the supply temperature and pressure of 20°C and 15 bar, respectively, in which the compressed hydrogen is delivered at 40°C, 60°C, 80°C, 100°C, 120°C and 140°C with a maximum pressure output of 270 bar. The measured PCI and thermodynamic data are employed to investigate the thermodynamic performance of TDSHC which results in the maximum compressor work of 10.13 W and the maximum cycle efficiency of 27.57% with an average heat input of 35 ± 3 W. The increase in discharge temperature on system performance are observed to increase in compressor work and efficiency due to the increase in discharge pressure, whereas the effect on heat input is not significant due to the reduction in hydrogen discharge amount. Also, the behaviour of metal hydride (MH) bed is predicted through the finite volume method in terms of variations in MH bed temperature and hydrogen transmission. The numerical investigation is carried out by solving the required energy equations and are validated with experimental data. The numerical investigation results into minimum cycle time of 2700 seconds for the operation of TDSHC. It is also observed that the increase in discharge temperature increases the reaction kinetics and hydrogen mass fraction.

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Overview of hydrogen compression materials based on a three-stage metal hydride hydrogen compressor

Peng

Ouyang

et al. 2022

Journal of Alloys and Compounds

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Applications of Hydrides

Cited by 5 publications

References 51 publications

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Characterisation of La₀_.₉Ce₀_.₁Ni₅ alloy for the development of single‐stage thermally driven sorption hydrogen compressor

Overview of hydrogen compression materials based on a three-stage metal hydride hydrogen compressor

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Applications of Hydrides

Cited by 5 publications

References 51 publications

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Vibration analysis of hydrogen, deuterium and tritium in metals: consequences on the isotope effect

Characterisation of La0.9Ce0.1Ni5 alloy for the development of single‐stage thermally driven sorption hydrogen compressor

Overview of hydrogen compression materials based on a three-stage metal hydride hydrogen compressor

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Characterisation of La₀_.₉Ce₀_.₁Ni₅ alloy for the development of single‐stage thermally driven sorption hydrogen compressor