Hydrogen Storage Alloys: Types and Characteristics

Nassar, Amal; Nassar, Eman; Younis, Mona

doi:10.1007/978-3-319-68255-6_148

Cited by 3 publications

(3 citation statements)

References 74 publications

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“…Thus, we guess that PuH may also be an intermediate compound that is difficult to detect during the rapid reaction of In fact, understanding the high-pressure behavior of Puhydrides has great significance in scientific and engineering applications. 17,18 On the one hand, Pu-hydrides are considered as the most complex compounds because their complex Pu-5f electronics just lie at the critical point of the itineration → localization transition with many peculiar properties involving the insulator−metal transition, 19 the superconducting transition, 20 and the first-order magnetic transition. 21 On the other hand, the high-pressure processes of plutonium hydrides are usually involved in many practical situations, such as the volume expansion during the hydride formation, the pressure of helium bubbles due to the decay of plutonium, and the stress due to the formation of the oxide film.…”

Section: ■ Introductionmentioning

confidence: 99%

Phase Diagram and Bonding States of Pu–H Binary Compounds at High Pressures

Zhao

et al. 2020

J. Phys. Chem. C

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The high-pressure processes of plutonium hydrides are usually involved in many practical situations, such as the volume expansion during the hydride formation, the pressure of helium bubbles due to the decay of plutonium, and the stress due to the formation of the oxide film. These cases could lead to the high-pressure phase transition of plutonium hydrides and thereby affect the properties of the material. The crystal structure and bonding properties of plutonium hydrides (PuH 1−10 ) under atmospheric pressure and high pressure are investigated by using the first-principle method in combination with a structure searching technique. Our results show that the predicted lattice structures of plutonium hydrides are stable over the given pressure range. A novel stable stoichiometry, PuH with space groupFm3̅ m, is thermodynamically, dynamically, and mechanically stable in the pressure range of 62−188 GPa, which may be synthesized through the pressure-induced disproportionation of PuH 2 . In particular, our theoretically predicted results indicate that PuH 3 undergoes pressure-induced phase transitions with the following sequence of phases, P6 3 cm → Pnma → R3̅ m → Cmcm, and the corresponding transition pressures are computed to be 4, 76, and 150 GPa, respectively. Interestingly, the most striking feature of PuH 3 is the pressure-induced transition from insulating to metallic forms. Analysis of the electric structures, charge density differences, and electronic localization functions indicates that all phases act mainly as metallic with ionic bonding at high pressure.

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Section: ■ Introductionmentioning

confidence: 99%

Phase Diagram and Bonding States of Pu–H Binary Compounds at High Pressures

Zhao

et al. 2020

J. Phys. Chem. C

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“…When H 2 is stored in FA, no hydrogen is lost in the form of water. The hydrogen content in FA (53 g/L, 4.4 wt %) is comparable to that in H 2 storage alloys, e.g., magnesium hydrides (2−6 wt % 132 ) and lower than that in methanol (99 g/L, 12.6 wt %).…”

Section: ■ Catalytic Hydrogenation Of Captured Comentioning

confidence: 99%

Homogeneous Carbon Capture and Catalytic Hydrogenation: Toward a Chemical Hydrogen Battery System

Wei

Sang

Moazezbarabadi

et al. 2022

JACS Au

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Recent developments of CO 2 capture and subsequent catalytic hydrogenation to C1 products are discussed and evaluated in this Perspective. Such processes can become a crucial part of a more sustainable energy economy in the future. The individual steps of this catalytic carbon capture and usage (CCU) approach also provide the basis for chemical hydrogen batteries. Here, specifically the reversible CO 2 /formic acid (or bicarbonate/formate salts) system is presented, and the utilized catalysts are discussed.

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“…Parthiban et al [2] applied response surface methodology and genetic algorithm to model and optimize the kerf width by determining the optimized CO 2 laser cutting parameter values for gas pressure, cutting speed, and laser power. By using the full factorial design, Nassar et al [3] optimized cutting speed, laser power, and gas pressure for maximizing the surface quality in CO 2 laser cutting of AISI 307 stainless steel. Girdu et al [4] studied the effect of laser power and cutting speed on different efficiency indicators of the laser cutting process such as linear specific energy, surface-specific energy, and volume-specific IOP Publishing doi:10.1088/1757-899X/1235/1/012015 2 energy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of specific cutting energy in laser fusion cutting of an aluminium alloy

Madić

Coteaţă

Janković

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Laser cutting is a non-contact, non-conventional method for contour cutting which is characterized by several process performances. The present paper aims to analyze the specific cutting energy in CO2 laser cutting of an aluminium alloy using nitrogen as an assist gas. An experimental investigation, based on the use of central composite design, was conducted to define mathematical models for the prediction of the kerf width, surface roughness, and specific cutting energy. Thus, an analysis of the effects of the laser power, cutting speed, and nitrogen pressure on the specific cutting energy is enabled. Moreover, the analysis of experimental data included the correlation between the specific cutting energy and surface roughness. Pareto optimization, considering specific cutting energy and surface roughness, was conducted to propose alternative laser cutting conditions concerning conflicting criteria.

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Hydrogen Storage Alloys: Types and Characteristics

Cited by 3 publications

References 74 publications

Phase Diagram and Bonding States of Pu–H Binary Compounds at High Pressures

Phase Diagram and Bonding States of Pu–H Binary Compounds at High Pressures

Homogeneous Carbon Capture and Catalytic Hydrogenation: Toward a Chemical Hydrogen Battery System

Analysis of specific cutting energy in laser fusion cutting of an aluminium alloy

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