Publicou 6 edições por ano
ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678
Indexed in
FLAME STRUCTURE OF HYDRAZINIUM NITROFORMATE
RESUMO
Flame structure of hydrazinium nitroformate (HNF) has been investigated by fine tungsten-rhenium thermocouples. The occurrence of an exothermic chemical reaction in condensed phase of HNF has been observed and attributed to reaction of N2H4 with decomposition products of nitroform anion yielded ammonium nitioformate (ANF) along with H2O, N2O and N2. The mechanism of the chemical processes that can result in these products has been proposed. Calculation of the heat balance at the boundary of condensed and gaseous phases has shown that the condensed phase heat release is quite considerable at low pressures. Analyzing of surface temperature data has allowed the assumption that the surface temperature of HNF is controlled by dissociation of the salt. Two distinct flames were observed above the burning surface of HNF in the temperature profiles at low pressures. Based on possible pathways of the nitroform decomposition, a suggestion has been made that decomposition of nitroform and oxidation of N2H4, NH3 and carbon-containing products (supposedly, nitrile N-oxide, CNO, or its isomer isocyanate, NCO radicals) take place in the first flame zone. Temperature in the second flame zone rises due to the exothermic decomposition of N2O and NO.
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Dragomir O.E., Tummers M.J., van Veen E.H., van der Heijden A.E.D.M., Roekaerts D.J.E.M., Experimental investigation of the HNF flame structure, Combustion and Flame, 153, 1-2, 2008. Crossref
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