Journal of Thermal Analysis and Calorimetry

, Volume 113, Issue 3, pp 1209–1216 | Cite as

Kinetic parameters for thermal decomposition of hydrazine

  • L. B. Santos
  • C. A. Ribeiro
  • J. M. V. Capela
  • M. S. Crespi
  • M. A. S. Pimentel
  • M. De Julio


The propulsion of most of the operating satellites comprises monopropellant (hydrazine––N2H4) or bipropellant (monometilydrazine—MMH and nitrogen tetroxide) chemical systems. When some sample of the propellant tested fails, the entire sample lot shall be rejected, and this action has turned into a health problem due to the high toxicity of N2H4. Thus, it is interesting to know hydrazine thermal behavior in several storage conditions. The kinetic parameters for thermal decomposition of hydrazine in oxygen and nitrogen atmospheres were determined by Capela–Ribeiro nonlinear isoconversional method. From TG data at heating rates of 5, 10, and 20 °C min−1, kinetic parameters could be determined in nitrogen (E = 47.3 ± 3.1 kJ mol−1, lnA = 14.2 ± 0.9 and T b = 69 °C) and oxygen (E = 64.9 ± 8.6 kJ mol−1, lnA = 20.7 ± 3.1 and T b = 75 °C) atmospheres. It was not possible to identify a specific kinetic model for hydrazine thermal decomposition due to high heterogeneity in reaction; however, experimental f(α)g(α) master-plot curves were closed to F 1/3 model.


Propellant Hydrazine Non isothermal kinetic Thermal decomposition 



The authors acknowledge Coordination for the Improvement of Higher Level -or Education- Personnel (CAPES—Brazilian Ministry of Education) for financial support and Test Stand with Altitude Simulation (INPE/LCP-BTSA) for sample support.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • L. B. Santos
    • 1
  • C. A. Ribeiro
    • 2
  • J. M. V. Capela
    • 2
  • M. S. Crespi
    • 2
  • M. A. S. Pimentel
    • 1
  • M. De Julio
    • 1
  1. 1.Aeronautical Institute of Technology––ITASao PauloBrazil
  2. 2.Analytical Chemistry DepartmentChemistry Institute, São Paulo State University, IQ/UNESPAraraquaraBrazil

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