Santos, L. B.Ribeiro, Clovis Augusto [UNESP]Capela, Jorge Manual Vieira [UNESP]Crespi, Marisa Spirandeli [UNESP]Pimentel, M. A SDe Julio, M.2014-05-272014-05-272013-09-01Journal of Thermal Analysis and Calorimetry, v. 113, n. 3, p. 1209-1216, 2013.1388-6150http://hdl.handle.net/11449/76386The 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 N2H 4. 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. © 2013 Akadémiai Kiadó, Budapest, Hungary.1209-1216engHydrazineNon isothermal kineticPropellantThermal decompositionDecomposition of hydrazineHigh heterogeneityIso-conversional methodNitrogen tetroxideNon-isothermal kineticOxygen and nitrogensStorage conditionThermal behaviorsDecompositionDigital storageKinetic parametersNitrogenNitrogen oxidesOxygenPropellantsPyrolysisTrabalho apresentado em evento10.1007/s10973-013-2968-8WOS:000323503300027Acesso aberto2-s2.0-84883139641849831089181008274713101139991400000-0002-7984-5908