Gas-Phase Conversion of Uranium Mononitride in a Nitrating AtmosphereстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 21 мая 2019 г.
Аннотация:Gas-phase conversion of UN to water-soluble compounds in NOx–air, NOx–H2O (vapor)–air, or
HNO3 (vapor)–air atmosphere (hereinafter, nitrating atmosphere) at temperatures from 298 to 673 K was studied. The use of the oxidizing atmosphere based on NOx gases allows the conversion to be performed at a lower temperature. The process yields both UO3 and hydrates of UO2(NO3)2. The highest conversion of UN to watersoluble compounds, ~80%, is reached at ~565 K. In the course of gas-phase conversion in NOx–H2O (vapor)– air and HNO3 (vapor)–air atmospheres, UN transforms into water-soluble compounds (nitrates, hydroxynitrates).
The gas-phase conversion of UN in an NOx–H2O (vapor)–air atmosphere occurs less efficiently than that in an HNO3 (vapor)–air atmosphere.