Production of the Spherical Nano-Al/AP Composites by Drowning-Out/Agglomeration and Their Solid-Reaction Kinetics

Shim, Hong‐Min; Kim, Jae-Kyeong; Kim, Hyoun-Soo; Koo, Kee-Kahb

doi:10.1021/acs.iecr.6b01558

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…This is consistent with the experimental findings. 40 However, it is not possible to compare the reduction value of the calculated activation energy with the corresponding experimental value because this calculation only included the initial steps of the HTD of AP and lacked a complete calculation of the HTD process, which is the limitation of this study.…”

Section: Reaction Mechanism Of Ap Decompositionmentioning

confidence: 99%

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Yan,

Xu,

Nie

et al. 2023

J. Phys. Chem. A

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There is an interactive effect between ammonium perchlorate (AP) and aluminum (Al) powder during the combustion process of composite solid propellants, but the mechanism of this effect is still lacking. Using quantum chemical methods, we investigated this mechanism from a molecular perspective. The interaction process between Al and AP was analyzed by comparing the chemical bond changes between the atoms during the reaction process of the Al/AP system and the AP unimolecular thermal decomposition system. The results show that Al atoms alter the reaction mechanism of AP thermal decomposition, significantly decreasing the activation energy of AP decomposition at high temperature but increasing that at low temperature. Meanwhile, the temperature-dependent rate constant of each basic reaction was calculated by transition state theory. The rate constants increase with temperature. Under high temperature and pressure, Al can increase the high-temperature decomposition rate of AP by up to 1–3 orders of magnitude.

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Section: Reaction Mechanism Of Ap Decompositionmentioning

confidence: 99%

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Yan,

Xu,

Nie

et al. 2023

J. Phys. Chem. A

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“…4−6 However, Al powder is difficult to ignite because its high ignition temperature reaches up to ∼2000 °C due to the existence of a dense Al 2 O 3 surface layer. 7,8 Moreover, Al powder tends to agglomerate during burning because of its low melting point of ∼660 °C. 9,10 Difficult ignition and easy agglomeration cause incomplete oxidation and low heat release activity of Al powder.…”

Section: Introductionmentioning

confidence: 99%

“…Metal powder is often used as a fuel in propellants, explosives, or pyrotechnics because of the high enthalpy of its combustion. − Al powder is a common metal fuel that is relatively inexpensive and safe to handle and has a relatively high volumetric combustion enthalpy. − However, Al powder is difficult to ignite because its high ignition temperature reaches up to ∼2000 °C due to the existence of a dense Al 2 O 3 surface layer. , Moreover, Al powder tends to agglomerate during burning because of its low melting point of ∼660 °C. , Difficult ignition and easy agglomeration cause incomplete oxidation and low heat release activity of Al powder.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Highly Efficient Hollow Ni/Al Bimetal Fuel with Enhanced Thermal Oxidation Behavior

Jiang

Cheng

et al. 2020

Ind. Eng. Chem. Res.

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Al powder has been used as a common fuel in various energetic materials because of the high enthalpy of its oxidation. The thermal oxidation behavior of Al fuel is a key issue that can determine the energetic properties of Al-based energetic materials. Paradoxically, highly active Al with a low melting point is trapped by a dense surface Al 2 O 3 inertia layer with a high melting point, resulting in low thermal oxidation efficiency at elevated temperatures. In this work, a series of low content of hollow Ni nanoparticles are decorated on the Al surface, and the formed Ni/ Al bimetal fuels are constructed through a novel and simple replacement reaction between Al and NiF 2 solution. NiF 2 not only ionizes F − to remove the Al 2 O 3 inertia layer but also ionizes Ni 2+ to provide a Ni source for deposition. Decorating with low-content Ni nanoparticles improves the intensity, speed, and completion of the high-temperature thermal behavior of Al powder. For instance, the high-temperature oxidation peak of the representative Ni/ Al with 2% Ni content is advanced by approximately 95 °C, and the heat release is over 1.85 times than that of the raw Al. The main role of Ni decoration can destroy effectively the Al 2 O 3 inert layer at high temperature and then enlarge the transport channels of oxygen molecules and Al ions, causing the inner molten Al to encounter external rich-oxygen environment rapidly. The as-obtained Ni/Al bimetal fuels are expected to have wide application prospects in solid energetic materials.

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“…The common components in solid rocket propellant are ammonium perchlorate (AP), nano aluminum (nAl) and additives . AP can be decomposed into gas mixtures of NO, N 2 O, NH 3 , O 2 , Cl 2 , HCl and ClO 3 with releasing large amount of heating, thus producing powerful pushing force .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermal Decomposition Properties and Catalytic Mechanism of Ammonium Perchlorate over CuO/MoS₂ Composite

Yang

Fan

et al. 2019

Applied Organom Chemis

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In this report, CuO/MoS2 composites were successfully prepared by the hydrothermal method where nano‐sized CuO was uniformly distributed on the surface of hierarchical MoS2 substrates (CuO/MoS2 composites). Their physicochemical properties and catalytic performance in ammonium perchlorate (AP) decomposition were investigated and characterized by XRD, SEM, TEM, BET, XPS, TG/DSC and combustion measurement. The results showed that it could decrease AP decomposition temperature at high decomposition stage from 416.5 °C to 323.5 °C and increase the heat release from 378 J/g (pure AP) to 1340 J/g (AP with catalysts), which was better than pure CuO nanoparticles (345.5 °C and 1046 J/g). Meanwhile, it showed excellent performance in combustion reaction either in N2 or air atmosphere. The results obtained by photocurrent spectra, photoluminescence spectra and time‐resolved fluorescence emission spectra indicated that loading CuO mediated the generation rate and combination rate of electrons and holes, thus tuning the catalytic performance on AP decomposition. This study proved that employing the supports that can synergistically interact with CuO is an efficient strategy to enhance the catalytic performance of CuO.

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Production of the Spherical Nano-Al/AP Composites by Drowning-Out/Agglomeration and Their Solid-Reaction Kinetics

Cited by 14 publications

References 27 publications

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Facile Fabrication of Highly Efficient Hollow Ni/Al Bimetal Fuel with Enhanced Thermal Oxidation Behavior

Enhanced Thermal Decomposition Properties and Catalytic Mechanism of Ammonium Perchlorate over CuO/MoS₂ Composite

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Production of the Spherical Nano-Al/AP Composites by Drowning-Out/Agglomeration and Their Solid-Reaction Kinetics

Cited by 14 publications

References 27 publications

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Mechanism of Interaction between Ammonium Perchlorate and Aluminum

Facile Fabrication of Highly Efficient Hollow Ni/Al Bimetal Fuel with Enhanced Thermal Oxidation Behavior

Enhanced Thermal Decomposition Properties and Catalytic Mechanism of Ammonium Perchlorate over CuO/MoS2 Composite

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Product

Resources

About

Enhanced Thermal Decomposition Properties and Catalytic Mechanism of Ammonium Perchlorate over CuO/MoS₂ Composite