Kinetics of the thermal decomposition of dinitramide

Autor: Yu. I. Rubtsov, L. P. Andrienko, A. I. Kazakov, G. B. Manelis
Rok vydání: 1998
Předmět:
Zdroj: Russian Chemical Bulletin. 47:379-385
ISSN: 1573-9171
1066-5285
DOI: 10.1007/bf02495639
Popis: The kinetic regularities of the heat release during the thermal decomposition of liquid NH4N(NO2)2 at 102.4--138.9 ~ were studied. Kinetic data for decomposition of different forms of dinitramide and the influence of water on the rate of decomposition of N H4N(NO2) 2 show that the contributions of the decomposition of N(NO2) 2- and HN(NO2) 2 to the initial decomposition rate of the reaction at temperatures about 100 ~ are approximately equal. The decomposition has an autocatalytic character. The analysis of the effect of additives of HNO 3 solutions and the dependence of the autocatalytic reaction rate constant on the gas volume in the system shows that the self-acceleration is due to an increase in the acidity of the NH4N(N02)2 melt owing to the accumulation of HNO 3 and the corresponding increase in the contribution of the HN(NO2) 2 decomposition to the overall rate. The self-acceleration ceases due to the accumulation of NO 3- ions decreasing the equilibrium concentration of HN(NO2) 2 in the melt.
Databáze: OpenAIRE
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