Confined rapid thermolysis/FTIR spectroscopy of hydroxylammonium nitrate

H. S. Lee, S. T. Thynell

Research output: Contribution to conferencePaperpeer-review

7 Scopus citations


Measurements have been made to investigate the isothermal decomposition characteristics of hydroxylammonium nitrate (HAN) in the condensed phase over the temperature range from 120 to 180 C. Experiments were conducted at atmospheric pressure in a nitrogen environment using confined rapid thermolysis (CRT)TFTIR spectroscopy. Results show that the major IR-active decomposition species of HAN-water mixtures are H2O, N2O, NO, NO2, and HNO3. For solid HAN, N2O is the dominant species formed, and HNO3 concentration is somewhat higher than that in solution state at the same temperature. It is conjectured that the evolution of species from the HAN-water mixture can be split into three general separate regions: 1) proton transfer is initiated and subsequent reactions form a pool of the highly reactive species HONO and HNO, 2) these species are involved in many subsequent reactions causing the evolution of gas-phase species and depletion of HAN, and 3) reactions in the condensed phase occur among products from HAN decomposition. Foils exposed to rapid thermolysis of HAN experienced essentially no pitting or fracturing over the range of temperatures studied.

Original languageEnglish (US)
StatePublished - 1997
Event33rd Joint Propulsion Conference and Exhibit, 1997 - Seattle, United States
Duration: Jul 6 1997Jul 9 1997


Other33rd Joint Propulsion Conference and Exhibit, 1997
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Systems Engineering
  • Aerospace Engineering


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