We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Kinetic parameters for thermal decomposition of hydrazine.
- Authors
Santos, L.; Ribeiro, C.; Capela, J.; Crespi, M.; Pimentel, M.; Julio, M.
- Abstract
The propulsion of most of the operating satellites comprises monopropellant (hydrazine--NH) 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 NH. 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, kinetic parameters could be determined in nitrogen ( E = 47.3 ± 3.1 kJ mol, ln A = 14.2 ± 0.9 and T = 69 °C) and oxygen ( E = 64.9 ± 8.6 kJ mol, ln A = 20.7 ± 3.1 and T = 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 model.
- Subjects
CHEMICAL kinetics; THERMAL analysis; CHEMICAL decomposition; HYDRAZINE; NITROGEN tetroxide; PARAMETERS (Statistics)
- Publication
Journal of Thermal Analysis & Calorimetry, 2013, Vol 113, Issue 3, p1209
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-013-2968-8