Sorption and desorption of BrF3 on NaF: Studies on thermodynamics and kinetics
| Autor: | V.I. Sobolev, R.V. Ostvald, G.N. Amelina, A.I. Rudnikov, I. I. Zherin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Bromine trifluoride
Arrhenius equation 010405 organic chemistry Vapor pressure Organic Chemistry Analytical chemistry Sorption Activation energy 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences Inorganic Chemistry Reaction rate chemistry.chemical_compound symbols.namesake Reaction rate constant chemistry Desorption symbols Environmental Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Journal of Fluorine Chemistry. 221:25-33 |
| ISSN: | 0022-1139 |
| DOI: | 10.1016/j.jfluchem.2019.03.003 |
| Popis: | Temperature dependence of bromine trifluoride vapor pressure over its adduct with sodium fluoride has been determined; the adduct normal dissociation temperature has been determined. Kinetics of sorption and desorption processes in BrF 3 (gas)–NaF(solid) system have been studied. The equation was proposed to illustrate the link between forward reaction rate (Ка) described by Arrhenius equation and experimental value (Ki): Ki= Kа⋅ (Pa/Peq)m, where Ki – observed reaction rate constant, Ka – forward reaction rate constant described by Arrhenius equation; Pa – partial pressure of BrF3; Peq – equilibrium pressure of BrF3 above BrF3⋅3NaF; m – factor characterizing the interaction area of BrF3 with NaF. The application of this equation makes possible to determine the true reaction rate values and reaction activation energy in chemisorption terms; it also helps to calculate the degree BrF3 sorption on NaF reaction at different temperatures and adsorbate pressures. The possibility of sorption-desorption separation of bromine trifluoride – uranium hexafluoride – iodine pentafluoride system with use of sodium fluoride was shown. |
| Databáze: | OpenAIRE |
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