Sorption and desorption of BrF <sub>3</sub> on NaF: Studies on thermodynamics and kinetics

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 language	English
Pages (from-to)	25-33
Number of pages	9
Journal	Journal of Fluorine Chemistry
Volume	221
DOIs	https://doi.org/10.1016/j.jfluchem.2019.03.003
Publication status	Published - 1 May 2019

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

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10.1016/j.jfluchem.2019.03.003

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Zherin, I. I., Rudnikov, A. I., Ostvald, R. V., Sobolev, V. I., & Amelina, G. N. (2019). Sorption and desorption of BrF ₃ on NaF: Studies on thermodynamics and kinetics. Journal of Fluorine Chemistry, 221, 25-33. https://doi.org/10.1016/j.jfluchem.2019.03.003

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 journal › Article

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title = "Sorption and desorption of BrF 3 on NaF: Studies on thermodynamics and kinetics",

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. ",

keywords = "Bromine trifluoride, Desorption, Iodine pentafluoride, Sodium fluoride, Sorption, Uranium hexafluoride",

author = "Zherin, {I. I.} and Rudnikov, {A. I.} and Ostvald, {R. V.} and Sobolev, {V. I.} and Amelina, {G. N.}",

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T2 - Studies on thermodynamics and kinetics

AU - Zherin, I. I.

AU - Rudnikov, A. I.

AU - Ostvald, R. V.

AU - Sobolev, V. I.

AU - Amelina, G. N.

PY - 2019/5/1

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AB - 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.

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KW - Sodium fluoride

KW - Sorption

KW - Uranium hexafluoride

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