Research of thermal decomposition of nitrate acid water solution
DOI:
https://doi.org/10.15587/1729-4061.2012.5550Keywords:
Nitrate acid, thermal decomposition, degree of decomposition, rate of reaction, reaction orderAbstract
The article represents the analysis of the research results of the thermal decomposition of nitrate acid water solutions in a concentration range of 10 - 40% of mass and temperature range 473 - 573 K. The order of the reaction is 1.98 - 2.01. The dependence of the rate constant of the reaction on temperature and concentration of original acid was determined. The equations to determine the rate of reaction in the differential and integral forms were suggested. It was found that the rate of decomposition of nitrate acid water solutions decreases with temperature fall, as well as with the decrease of concentration of HNO3. The determination of the activation energy of thermal decomposition of nitrate acid – water systems revealed that as the concentration of HNO3 increases the activation energy decreases. The results obtained conform to the available literature data for similar systems
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Copyright (c) 2014 Володимир Олександрович Пономарьов, Григорій Іванович Гринь, Віктор Гнатович Созонтов
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