Sorption and desorption of BrF 3 on NaF: Studies on thermodynamics and kinetics

I. I. Zherin, A. I. Rudnikov, R. V. Ostvald, V. I. Sobolev, G. N. Amelina

Research output: Contribution to journalArticle

Abstract

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 (К а ) described by Arrhenius equation and experimental value (K i ): K i = K а ⋅ (P a /P eq ) m , where Ki – observed reaction rate constant, K a – forward reaction rate constant described by Arrhenius equation; P a – partial pressure of BrF 3 ; P eq – equilibrium pressure of BrF 3 above BrF 3 ⋅3NaF; m – factor characterizing the interaction area of BrF 3 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 BrF 3 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.

Original languageEnglish
Pages (from-to)25-33
Number of pages9
JournalJournal of Fluorine Chemistry
Volume221
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Thermodynamics
reaction rate
sorption
Reaction rates
Sorption
Desorption
desorption
Sodium Fluoride
reaction kinetics
thermodynamics
sodium fluorides
kinetics
Kinetics
Temperature
bromine
fluoride
adducts
Vapor Pressure
Pressure
Rate constants

Keywords

  • Bromine trifluoride
  • Desorption
  • Iodine pentafluoride
  • Sodium fluoride
  • Sorption
  • Uranium hexafluoride

ASJC Scopus subject areas

  • Biochemistry
  • Environmental Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Sorption and desorption of BrF 3 on NaF : Studies on thermodynamics and kinetics. / Zherin, I. I.; Rudnikov, A. I.; Ostvald, R. V.; Sobolev, V. I.; Amelina, G. N.

In: Journal of Fluorine Chemistry, Vol. 221, 01.05.2019, p. 25-33.

Research output: Contribution to journalArticle

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AU - Rudnikov, A. I.

AU - Ostvald, R. V.

AU - Sobolev, V. I.

AU - Amelina, G. N.

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