Preparation of Mesoporous CuCe-Based Ternary Metal Oxide by Nano-Replication and Its Application to Decomposition of Liquid Monopropellant

Hong, Sunghoon; Heo, Sujeong; Li, Chengbin; Jeon, Bo Kyeong; Kim, Ji Man; Jo, Young Min; Kim, Wooram; Jeon, Jong‐Ki

doi:10.1166/jnn.2018.14908

Cited by 4 publications

(3 citation statements)

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“…ADN decomposition is a violent exothermic reaction, rendering a catalytic bed temperature generally higher than 1200 °C. 113,114 Therefore, the selection of a suitable support for the catalysts is of great signicance for manufacturing a stable catalyst. Al 2 O 3 is widely employed as a support for the decomposition of hydrazine and ADN due to its outstanding mechanical strength.…”

Section: Selection Of Carriers For Adn-based Monopropellant Liquid Pr...mentioning

confidence: 99%

Research progress on the catalytic and thermal decomposition of ammonium dinitramide (ADN)

Tian,

Xu,

Cong

et al. 2024

RSC Adv.

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Section: Selection Of Carriers For Adn-based Monopropellant Liquid Pr...mentioning

confidence: 99%

Research progress on the catalytic and thermal decomposition of ammonium dinitramide (ADN)

Tian,

Xu,

Cong

et al. 2024

RSC Adv.

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“…In order to apply HAN as an ionic liquid propellant, a high level of stability is required. For this purpose, it must be dissolved in H 2 O [3,25]. Previously, it was reported that there are eight decomposition pathways, expressed here as Equations ( 2)- (9) for the aqueous HAN solution, as follows [26]:…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts

Yoo,

Kim,

et al. 2024

Catalysts

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The objectives of this study were to prepare a high-purity hydroxylammonium nitrate (HAN) solution and evaluate the performance of various types of metal oxide/honeycomb catalysts during the catalytic decomposition of the HAN solution. Hydroxylammonium nitrate was prepared via a neutralization reaction of hydroxylamine and nitric acid. FT-IR was used to analyze the chemical composition, chemical structure, and functional groups of the HAN. The aqueous HAN solution obtained from pH 7.06 showed the highest concentration of HAN of 60% and a density of 1.39 g/mL. The concentration of HAN solution that could be obtained when the solvent was evaporated to the maximum level could not exceed 80%. In this study, catalysts were prepared using a honeycomb structure made of cordierite (5SiO2-2MgO-2Al2O3) as a support, with Mn, Co, Cu, Pt, or Ir impregnated as active metals. The pore structure of the metal oxide/honeycomb catalysts did not significantly depend on the type of metal loaded. The Cu/honeycomb catalyst showed the strongest effect of lowering the decomposition onset temperature in the decomposition of the HAN solution likely due to the intrinsic activity of the Cu metal being superior to that of the other metals. It was confirmed that the effect of the catalyst on the decomposition mechanism of the aqueous HAN solution was negligible. Through a repetitive cycle of HAN decomposition, it was confirmed that the Cu/honeycomb catalyst could be recovered and reused as a catalyst for the decomposition of an aqueous HAN solution.

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“…In particular, when Sr or Ba is added into the hexaaluminate structure, it reportedly has high heat resistance even at temperatures of 1200 • C or higher [15,16]. Ir, Pt, Cu, and Rh supported on hexaaluminates were reported as effective catalysts for the decomposition of ADN-and HAN-based liquid monopropellants [17,18]. However, the effects of the synthesis procedure and heat treatment of a hexaaluminate catalyst on the decomposition performance of an ionic liquid propellant remain to be studied.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Decomposition of an Energetic Ionic Liquid Solution over Hexaaluminate Catalysts

et al. 2019

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The objective of this study was to determine the effect of a synthesis procedure of Sr hexaaluminate on catalytic performance during the decomposition of ionic liquid monopropellants based on ammonium dinitramide (ADN) and hydroxyl ammonium nitrate (HAN). Sr hexaaluminates were prepared via both coprecipitation and a sol–gel process. The surface area of hexaaluminate synthesized via the coprecipitation method was higher than that of hexaaluminate synthesized by the sol–gel process, and calcined at the same temperature of 1200 °C or more. This is because of the sintering of α-Al2O3 on the hexaaluminate synthesized via the sol–gel process, which could not be observed on the catalysts synthesized via the coprecipitation method. The hexaaluminate synthesized via coprecipitation showed a lower decomposition onset temperature during the decomposition of ADN- and HAN-based liquid monopropellants in comparison with the catalysts synthesized via the sol–gel process, and calcined at the same temperature of 1200 °C or more. This is attributed to the differences in the Mn3+ concentration and the surface area between the two hexaaluminates. Consequently, the hexaaluminate synthesized via coprecipitation which calcined above 1200 °C showed high activity during the decomposition of energetic ionic liquid monopropellants compared with the hexaaluminate synthesized via the sol–gel process.

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Preparation of Mesoporous CuCe-Based Ternary Metal Oxide by Nano-Replication and Its Application to Decomposition of Liquid Monopropellant

Cited by 4 publications

References 4 publications

Research progress on the catalytic and thermal decomposition of ammonium dinitramide (ADN)

Research progress on the catalytic and thermal decomposition of ammonium dinitramide (ADN)

Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts

Catalytic Decomposition of an Energetic Ionic Liquid Solution over Hexaaluminate Catalysts

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