Calorimetric study on electrolytic decomposition of hydroxylammonium nitrate (HAN) ternary mixtures

Wai Siong Chai, Jit Kai Chin, Kean How Cheah, Kai Seng Koh, Tengku F. Wahida Ku Chik

Research output: Contribution to journalArticle

Abstract

Electrolytic decomposition of hydroxylammonium nitrate (HAN) is appealing for development of chemical micropropulsion system due to its effectiveness in thermal management. In this paper we present the decomposition characteristics and behaviour of various HAN ternary mixtures prepared according to 0 Oxygen Balance (0 OB). There are multiple stages of decomposition depending on the type of fuels added into the HAN solution. While concentrated HAN solution (73 wt%) has only single stage of decomposition, the saccharides-based HAN ternary mixtures has three stages reaction with increased energy release. The addition of nitrogen-rich compounds has sustained the electrolytic decomposition process into the second stage of reaction, which produced the highest decomposition temperature. The study also reveals a linear relationship between the electrical resistivity of HAN ternary mixture and reaction rate in the first stage of reaction, indicating the presence of Joule heating in the process. The influence of electrical resistivity of the ternary mixture became negligible in the second stage of reaction. This work concludes the importance of combined electrical and thermal energy in the first stage decomposition of HAN ternary mixtures.
Original languageEnglish
Pages (from-to)66-71
Number of pages6
JournalActa Astronautica
Volume162
Early online date5 Jun 2019
DOIs
Publication statusPublished - 1 Sep 2019

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Nitrates
Decomposition
Joule heating
Thermal energy
Temperature control
Reaction rates
Nitrogen
Oxygen
Temperature

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Chai, Wai Siong ; Chin, Jit Kai ; Cheah, Kean How ; Koh, Kai Seng ; Wahida Ku Chik, Tengku F. / Calorimetric study on electrolytic decomposition of hydroxylammonium nitrate (HAN) ternary mixtures. In: Acta Astronautica. 2019 ; Vol. 162. pp. 66-71.
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abstract = "Electrolytic decomposition of hydroxylammonium nitrate (HAN) is appealing for development of chemical micropropulsion system due to its effectiveness in thermal management. In this paper we present the decomposition characteristics and behaviour of various HAN ternary mixtures prepared according to 0 Oxygen Balance (0 OB). There are multiple stages of decomposition depending on the type of fuels added into the HAN solution. While concentrated HAN solution (73 wt{\%}) has only single stage of decomposition, the saccharides-based HAN ternary mixtures has three stages reaction with increased energy release. The addition of nitrogen-rich compounds has sustained the electrolytic decomposition process into the second stage of reaction, which produced the highest decomposition temperature. The study also reveals a linear relationship between the electrical resistivity of HAN ternary mixture and reaction rate in the first stage of reaction, indicating the presence of Joule heating in the process. The influence of electrical resistivity of the ternary mixture became negligible in the second stage of reaction. This work concludes the importance of combined electrical and thermal energy in the first stage decomposition of HAN ternary mixtures.",
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Calorimetric study on electrolytic decomposition of hydroxylammonium nitrate (HAN) ternary mixtures. / Chai, Wai Siong; Chin, Jit Kai; Cheah, Kean How; Koh, Kai Seng; Wahida Ku Chik, Tengku F.

In: Acta Astronautica, Vol. 162, 01.09.2019, p. 66-71.

Research output: Contribution to journalArticle

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