Oxidation kinetics of magnesium particles determined by isothermal and non-isothermal methods of thermogravimetric analysis

Cordova, Sergio; Estala-Rodriguez, Kevin; Shafirovich, Evgeny

doi:10.1016/j.combustflame.2021.111861

Cited by 24 publications

(6 citation statements)

References 38 publications

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“…This discrepancy is explained by the presence of an oxide shell in the initial sample. These results are in a good agreement with TGA data reported by other groups for micron-sized Mg powders 33 − 35 and Mg NPs synthesized by a vapor-phase method. 1 …”

Section: High-temperature Oxidation In Airsupporting

confidence: 92%

“…While the protective behavior of the oxide layer is generally explained by a diffusion-controlled process, the absence of oxidation followed by a very rapid oxidation observed for Mg-MgO bulk powder (Figure ) and hollowing of single particles (Figure ) at temperatures above 400 °C indicates a change in the mechanism. A growing, thick MgO layer was previously suggested to fail at protecting the underlying Mg due to pores and cracks formation attributed to the volume mismatch between Mg and MgO (Pilling–Bedworth ratio of 0.81) . However, MgO grows extremely slowly even at elevated temperatures: its experimental growth kinetics at 300 °C follows an inverse logarithmic law, while kinetic modeling of the diffusion-limited oxidation of Mg demonstrated growth from 10 to 30 nm thick MgO in 14 h at 400 °C and 0.21 atm O 2 .…”

Section: High-temperature Oxidation In Airmentioning

confidence: 98%

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Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

Lomonosov,

Yang,

Fan

et al. 2024

Nano Lett.

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Magnesium is a recent addition to the plasmonic toolbox: nanomaterials that efficiently utilize photons' energy due to their ability to sustain localized surface plasmon resonances. Magnesium nanoparticles protected by a native oxide shell can efficiently absorb light across the solar spectrum, making them a promising photocatalytic material. However, their inherent reactivity toward oxidation may limit the number of reactions in which Mg-MgO can be used. Here, we investigate the stability of plasmonic Mg-MgO core−shell nanoplates under oxidative conditions. We demonstrate that the MgO shell stabilizes the metallic Mg core against oxidation in air at up to 400 °C. Furthermore, we show that the reactivity of Mg-MgO nanoplates with water vapor (3.5 vol % in N 2 ) decreases with temperature, with no oxidation of the Mg core detected from 200 to 400 °C. This work unravels the potential of Mg-MgO nanoparticles for a broad range of catalytic transformations occurring in oxidative environments.

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Section: High-temperature Oxidation In Airsupporting

confidence: 92%

Section: High-temperature Oxidation In Airmentioning

confidence: 98%

Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

Lomonosov,

Yang,

Fan

et al. 2024

Nano Lett.

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“…A value of n between 3 and 2.5 indicates the 2D growth of MgH 2 during ball milling. On the other hand, when n ranges from 4 to 3, the hydrogenation kinetics of MgH 2 is controlled by three-dimensional random growth due to irregular diffusion and bonding between crystalline structures and atoms. , Thus, it can be deduced that the hydrogenation of Mg@CNTs-Pd is three-dimensional with the dimensionality decreasing as the milling intensity increases.…”

Section: Results and Discussionmentioning

confidence: 99%

CNTs-Pd as Efficient Bidirectional Catalyst for Improving Hydrogen Absorption/Desorption Kinetics of Mg/MgH₂

Duan,

Wu,

Liang

et al. 2024

Energy Fuels

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The hydrogen storage potential and cost-effectiveness of MgH 2 have rendered it a desirable material for hydrogen storage. However, its application has been hindered by limitations in thermal stability and dehydrogenation kinetics. In this study, the carbon nanotube-Pd bifunctional catalyst was prepared by using hydrothermal and calcination technology, significantly improving the kinetics of Mg/MgH 2 during hydrogen adsorption/desorption. The activation energy for the Mg@ CNTs-Pd was reduced to 42.73 kJ/mol, as determined by fitting the Avrami−Erofeev model with the Arrhenius equation. Additionally, the activation energy during dehydrogenation was found to be 73.98 kJ/mol based on the Johnson−Mehl−Avrami−Kolmogorov equation and the Arrhenius equation. It is worth noting that the dynamic enhancement persists even after 10 cycles. This groundbreaking research has paved the way for potential applications of MgH 2 as a hydrogen storage material, providing it with broader development opportunities.

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“…548 Several metals are being discussed with numerous studies on iron 539,549−558 and aluminum, 538,559−565 also considering, e.g, lithium 566 and magnesium. 547,567,568 Alumina combustion can be performed in air or in water, with the latter providing also hydrogen as a product. 540,543,544,559 Hydrogen production on demand at any desired location, at different scales, from the highly exothermic reactions of light metals (Al, Mg, Li) with water could be a significant technological advantage.…”

Section: Metal Fuelsmentioning

confidence: 99%

“…Recent literature mainly considers the role of metals as energy carriers, − in heat and power generation processes, ,− and addresses also life-cycle analyses . Several metals are being discussed with numerous studies on iron ,− and aluminum, ,− also considering, e.g, lithium and magnesium. ,, Alumina combustion can be performed in air or in water, with the latter providing also hydrogen as a product. ,,, Hydrogen production on demand at any desired location, at different scales, from the highly exothermic reactions of light metals (Al, Mg, Li) with water could be a significant technological advantage. , A schematic view of an aluminum-based power generation process is shown in Figure …”

Section: Fuels For a Carbon-reduced Perspectivementioning

confidence: 99%

Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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Combustion is a reactive oxidation process that releases energy bound in chemical compounds used as fuels�energy that is needed for power generation, transportation, heating, and industrial purposes. Because of greenhouse gas and local pollutant emissions associated with fossil fuels, combustion science and applications are challenged to abandon conventional pathways and to adapt toward the demand of future carbon neutrality. For the design of efficient, low-emission processes, understanding the details of the relevant chemical transformations is essential. Comprehensive knowledge gained from decades of fossil-fuel combustion research includes general principles for establishing and validating reaction mechanisms and process models, relying on both theory and experiments with a suite of analytic monitoring and sensing techniques. Such knowledge can be advantageously applied and extended to configure, analyze, and control new systems using different, nonfossil, potentially zero-carbon fuels. Understanding the impact of combustion and its links with chemistry needs some background. The introduction therefore combines information on exemplary cultural and technological achievements using combustion and on nature and effects of combustion emissions. Subsequently, the methodology of combustion chemistry research is described. A major part is devoted to fuels, followed by a discussion of selected combustion applications, illustrating the chemical information needed for the future.

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Oxidation kinetics of magnesium particles determined by isothermal and non-isothermal methods of thermogravimetric analysis

Cited by 24 publications

References 38 publications

Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

CNTs-Pd as Efficient Bidirectional Catalyst for Improving Hydrogen Absorption/Desorption Kinetics of Mg/MgH₂

Combustion, Chemistry, and Carbon Neutrality

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Oxidation kinetics of magnesium particles determined by isothermal and non-isothermal methods of thermogravimetric analysis

Cited by 24 publications

References 38 publications

Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

Stability of Plasmonic Mg-MgO Core–Shell Nanoparticles in Gas-Phase Oxidative Environments

CNTs-Pd as Efficient Bidirectional Catalyst for Improving Hydrogen Absorption/Desorption Kinetics of Mg/MgH2

Combustion, Chemistry, and Carbon Neutrality

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CNTs-Pd as Efficient Bidirectional Catalyst for Improving Hydrogen Absorption/Desorption Kinetics of Mg/MgH₂