Thermal and evolved gas analyses of decomposition of ammonium dinitramide-based ionic liquid propellant using TG–DSC–HRTOFMS
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Thermal and evolved gas analyses were carried out to assess the decomposition of an ionic liquid propellant consisting of ammonium dinitramide (ADN), methylammonium nitrate (MMAN) and urea, using thermogravimetry–differential scanning calorimetry–high-resolution time-of-flight mass spectrometry (TG–DSC–HRTOFMS). This technique simultaneously assesses the thermal and evolved gas behavior and is able to distinguish between products having similar mass-to-charge ratios, based on accurate mass determinations. ADN/MMAN and ADN/MMAN/urea mixtures were found to decompose to form NH3, H2O, HCN, CO, N2, CH2O, CH3NH2, HNCO, CO2, N2O and HNO3, and possible reaction schemes for the decomposition processes were developed. Interactions between ADN and MMAN appear to enhance the generation of N2, while the presence of urea reduces the net exothermic heat of reaction due to the endothermic pyrolysis reaction of urea to NH3 and HNCO, followed by the reaction HNCO + H2O → NH3 + CO2.
KeywordsAmmonium dinitramide Ionic liquid propellant Thermal decomposition Evolved gas analysis TG–DSC–HRTOFMS
This research was supported by JSPS KAKENHI Grant Number 17H00844.
- 1.Larsson A, Wingborg N. Green propellants based on ammonium dinitramide (ADN). In: Hall J, editor. Advances in spacecraft technologies. Rijeka: InTech; 2011. p. 139–56.Google Scholar
- 4.Negri M, Wilhelm M, Hendrich C, Wingborg N, Gediminas L, Adelöw L, Maleix C, Chabernaud P, Brahmi R, Beauchet R, Batonneau Y, Kappenstein C, Koopmans R-J, Schuh S, Bartok T, Scharlemann C, Gotzig U, Schwentenwein M. New technologies for ammonium dinitramide based monopropellant thrusters—the project RHEFORM. Acta Astronaut. 2018;143:105–17.CrossRefGoogle Scholar
- 5.Shiota K, Itakura M, Izato Y, Matsunaga H, Habu H, Miyake A. Effects of amide compounds and nitrate salts on the melting point depression of ammonium dinitramide. Sci Technol Energ Mater. 2018;79:137–41.Google Scholar
- 6.Matsunaga H, Habu H, Miyake A. Preparation and thermal decomposition behavior of ammonium dinitramide-based energetic ionic liquid propellant. Sci Technol Energ Mater. 2017;78:65–70.Google Scholar
- 7.Matsunaga H, Katoh K, Habu H, Noda M, Miyake A. preparation and thermal decomposition behavior of high-energy ionic liquids based on ammonium dinitramide and amine nitrates. Trans JSASS Aerospace Technol Jpn. 2018;16:82–92.Google Scholar
- 8.Matsunaga H, Habu H, Miyake A. Thermal decomposition mechanism of ammonium dinitramide. In: Proceedings of the 16th seminar on new trends in research of energetic materials; 2013. p. 268–276.Google Scholar
- 25.Matsunaga H, Habu H, Miyake A. Analysis of evolved gases during the thermal decomposition of ammonium diniramide under pressure. Sci Technol Energ Mater. 2017;78:75–80.Google Scholar
- 27.Shiota K, Izato Y, Matsunaga H, Habu H, Miyake A. Thermal properties of ammonium dinitramide, monomethylamine nitrate and urea based ionic liquid gel propellants. Trans Jpn Soc Aeronaut Space Sci. 2018;16:93–7.Google Scholar
- 32.Linstrom PJ, Mallard WG. NIST Chemistry WebBook. NIST Standard Reference Database Number 69. Eds. National Institute of Standards and Technology. http://webbook.nist.gov. Accessed 30 Sep 4 2018.
- 33.Friedel RA, Shultz JL, Sharkey AG. Mass spectrum of nitric acid. Anal Chem. 1967;45:1128.Google Scholar
- 37.Izato Y, Miyake A. Identification of radical reactions and products for aqueous hydroxylamine nitrate (HAN) solution based on ab initio calculations. Sci Technol Energ Mater. 2018;79:108–14.Google Scholar