Magnesium gasar as a potential monolithic hydrogen absorbent

Boczkal, G.; Janoska, M.; Setman, Daria; Schafler, Erhard; Długosz, P.; Darłak, P.

doi:10.1016/j.ijhydene.2021.01.166

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Lowering temperature causes the melt to undergo the eutectic transition to a heterogeneous two-phase system of "solid metal" and "gas," resulting in gas entrapment in metal and hence directional cellular morphologies achieved. 4,9,45,46,76 Figure 6 illustrates a schematic of the manufacturing process of GASAR.…”

Section: Dissolved Gases (Solid Gas Eutectic Solidification-gasar Dir...mentioning

confidence: 99%

“…The Russian abbreviation for this technique is GASAR, which stands for gas-reinforced porous material. , The technique involves creating a eutectic system between hydrogen gas and liquid metals like copper, aluminum, nickel, magnesium, iron, chromium, and Al 2 O 3 -MgO. ,,, This involves melting metals under high pressure (up to 50 atm) in hydrogen atmospheres, resulting in a homogeneous melt charge with hydrogen. Lowering temperature causes the melt to undergo the eutectic transition to a heterogeneous two-phase system of “solid metal” and “gas,” resulting in gas entrapment in metal and hence directional cellular morphologies achieved. ,,,, Figure illustrates a schematic of the manufacturing process of GASAR.…”

Section: Classification Of Metallic Foam Production and Processing Te...mentioning

confidence: 99%

Section: Classification Of Metallic Foam Production and Processing Te...mentioning

confidence: 99%

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A Review of Different Manufacturing Methods of Metallic Foams

Hassan,

Alnaser

2024

ACS Omega

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Metallic foam is a popular topic due to its diverse industrial applications and unique combination of properties. Metallic foam is significantly lighter than nonfoam metal materials due to its porous structure, which incorporates a substantial amount of air or voids. This lower density makes metallic foam advantageous in applications in which weight reduction is critical. This makes it ideal for the aerospace, automotive, and construction industries; also, its versatile nature continues to make it an attractive material for various industrial applications such as impact absorbers, heat exchangers, and biomedical and marine engineering. However, the choice between metallic foam and nonfoam metal also depends on other factors like mechanical properties, cost, and specific application requirements. This review describes various fabrication methods of metallic foam that include the liquid metallurgy route which uses liquid or semiliquid metal, the powder metallurgy route uses metal in powder form, metal ion, and the metal vapor route which uses electrolytic deposition method to produce metallic foam. These methods include direct gas injection, adding blowing agents in solid or liquid metals, investment casting, the addition of a space holder in the precursor, metallic ion, vapor deposition on a polymer sponge, and many more. The morphology of metallic foam depends upon the method that is chosen for fabrication, and up to 98% porosity can be achieved by these methods. Additive manufacturing for metallic foam fabrication is an emerging field based on selective laser melting and electron beam melting principles. It has exceptional possibilities for generating complicated 3D shapes and customizing the material characteristics. The main purpose of this review article is to give significant insights into the various production procedures for metallic foams to researchers, engineers, and industry experts, assisting in the selection of acceptable methods depending on individual application needs. This review investigates the manufacturing conditions for metallic foams and finally discusses their advantages, drawbacks, and obstacles in mass production. The findings add to current efforts to expand metallic foam technology and encourage its wider application across diverse sectors, opening the path for future research and development.

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Section: Dissolved Gases (Solid Gas Eutectic Solidification-gasar Dir...mentioning

confidence: 99%

Section: Classification Of Metallic Foam Production and Processing Te...mentioning

confidence: 99%

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A Review of Different Manufacturing Methods of Metallic Foams

Hassan,

Alnaser

2024

ACS Omega

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“…47 A dramatic increase in the O/content was observed, which accounts for 44.6% of the obtained oil composition (Figure 4B); this result confirmed that the increase in the O/ content concentration in v-PP is upcycled oil formed via the oxidation of the PP. 48 To further investigate the effect of the hydrogen gas on the composition of the upcycled oil obtained from the open reactor pyrolysis process and find a way to further improve the olefin content, the pyrolysis of v-HDPE was performed in the open reactor in the presence of H 2 gas absorbers such as activated carbon, 49 magnesium powder, 50 and an oxidant (manganese stearate) 51 in different weight ratios.…”

Section: Acs Appliedmentioning

confidence: 99%

Tailoring Olefin Contents Formation during Waste Plastic Pyrolysis

Shaker,

Rabnawaz

2024

ACS Appl. Polym. Mater.

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As reported herein, we investigated the effect of feedstock composition, reactor type, and catalyst on the olefinic composition of oil recovered through plastic pyrolysis. We investigated an open reactor versus an autoclave closed reactor using polypropylene, linear low-density polyethylene, high-density polyethylene (HDPE), and low-density polyethylene, including both virgin and waste mixed plastics as feedstocks. The obtained oils were analyzed for comparison to their olefin contents. Additionally, the effects of H2 gas absorbers such as activated carbon and magnesium powder and an oxidant such as manganese stearate were evaluated regarding their impact on the olefin content of oils derived from both virgin and recycled HDPE. Our findings suggest that the formation of olefins (R–CH = CHR, where R is H or an alkyl group) during pyrolysis can be tailored through the selection of the reactor, feedstock, and catalysts, potentially enhancing the production of olefinic monomers from polyolefin waste plastics.

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“…3 An attempt has also been made to apply through-hole rotor magnesium to hydrogen storage, where through holes are utilized to let hydrogen permeate the entire metal. 4 As for lotus-type semiconductors, lotus silicon has been produced 5 and it has been doped with B for application as a thermo-electric material. 6 There are various methods for producing lotus metals, such as gas injection and casting.…”

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confidence: 99%

Optimization of Pore Formation Process of Lotus Aluminum by Phase Field Simulation

et al. 2023

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We have used multi-phase field simulation to mimic the actual process of lotus aluminum production, i.e., unidirectional solidification of aluminum in a hydrogen atmosphere. We used PD control and PID control, conventional methods of feedback control, to control the pore width precisely in the simulation. The pore width was shown to decrease slowly in PID control due to the slow feedback of I-control, and PD control was shown to produce stable long pores, although the pore width became larger than the target pore width. The initial hydrogen concentration in the liquid, which was controlled by atmospheric hydrogen pressure, had a significant effect on the pore growth; the higher the hydrogen concentration, the thicker the pore width and vice versa. It was also clarified that the pore width and the elongation length of the pore took various values depending on the combination of PD parameters even if the same target value was set.

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Magnesium gasar as a potential monolithic hydrogen absorbent

Cited by 7 publications

References 19 publications

A Review of Different Manufacturing Methods of Metallic Foams

A Review of Different Manufacturing Methods of Metallic Foams

Tailoring Olefin Contents Formation during Waste Plastic Pyrolysis

Optimization of Pore Formation Process of Lotus Aluminum by Phase Field Simulation

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