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Volume 14
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10.3390/catal14020116
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Article

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

by
Dalsan Yoo
1,
Munjeong Kim
1,
Seung Kyo Oh
1,
Seoyeon Hwang
1,
Sohee Kim
2,
Wooram Kim
2,
Yoonja Kwon
2,
Youngmin Jo
2 and
Jong-Ki Jeon
1,*
1
Department of Chemical Engineering, Kongju National University, Cheonan 31080, Republic of Korea
2
Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Republic of Korea
*
Author to whom correspondence should be addressed.
Catalysts 2024, 14(2), 116; https://doi.org/10.3390/catal14020116
Submission received: 30 December 2023 / Revised: 26 January 2024 / Accepted: 29 January 2024 / Published: 31 January 2024
(This article belongs to the Special Issue Heterogeneous Catalysis: From Nano- and Cluster-Catalysts to Single-Atom Catalysts)
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Abstract

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.
Keywords: hydroxylammonium nitrate; synthesis; liquid monopropellant; catalytic decomposition; honeycomb catalyst hydroxylammonium nitrate; synthesis; liquid monopropellant; catalytic decomposition; honeycomb catalyst

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MDPI and ACS Style

Yoo, D.; Kim, M.; Oh, S.K.; Hwang, S.; Kim, S.; Kim, W.; Kwon, Y.; Jo, Y.; Jeon, J.-K. Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts. Catalysts 2024, 14, 116. https://doi.org/10.3390/catal14020116

AMA Style

Yoo D, Kim M, Oh SK, Hwang S, Kim S, Kim W, Kwon Y, Jo Y, Jeon J-K. Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts. Catalysts. 2024; 14(2):116. https://doi.org/10.3390/catal14020116

Chicago/Turabian Style

Yoo, Dalsan, Munjeong Kim, Seung Kyo Oh, Seoyeon Hwang, Sohee Kim, Wooram Kim, Yoonja Kwon, Youngmin Jo, and Jong-Ki Jeon. 2024. "Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts" Catalysts 14, no. 2: 116. https://doi.org/10.3390/catal14020116

APA Style

Yoo, D., Kim, M., Oh, S. K., Hwang, S., Kim, S., Kim, W., Kwon, Y., Jo, Y., & Jeon, J.-K. (2024). Synthesis of Hydroxylammonium Nitrate and Its Decomposition over Metal Oxide/Honeycomb Catalysts. Catalysts, 14(2), 116. https://doi.org/10.3390/catal14020116

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