You need JavaScript to view this

Isotopic exchange kinetics of zinc ions in Zn-A zeolite

Abstract

The isotopic exchange kinetics of Zn/sup 2 +/ ions in hydrated Zn-A zeolite of composition (Znsub(5.55)Nasub(0.90)(A10/sub 2/)/sub 12/(Si0/sub 2/)/sub 12/.aq) have been investigated by measuring the fractional attainment of isotopic equilibrium between a ZnCl/sub 2/ solution and a /sup 65/Zn-labelled Zn-A zeolite (30 and 45 ..mu..m particle radii) as a function of time, in the temperature range 25 to 60/sup 0/C. The exchange mechanism is a two-step process which has been resolved, using the Brown-Sherry-Krambeck model (J.Phys.Chem.;75:3846(1971)) into diffusion in the solid particles, with Zn/sup 2 +/ diffusivity of D = 10sup(-3.97 + -0.03) exp(-Esub(D)/RT)m/sup 2/ s/sup -1/, Esub(D) = 67.1 +- 0.5 kJ molee/sup -1/, and an intracrystalline first-order exchange between bound and mobile Zn/sup 2 +/ ions in the network, with a rate constant of k/sub 2/ = 10sup(3.05 +- 0.25) exp(-Esub(k)/RT)s/sup -1/, Esub(k) = 56.5 +- 1.5 kJ mol/sup -1/.
Authors:
Radak, V M; Gal, I J; Salai, J J [1] 
  1. Belgrade Univ. (Yugoslavia)
Publication Date:
Jan 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-274876; EDB-77-031533
Resource Relation:
Journal Name: J. Chem. Soc. (London), Faraday Trans., I; (United Kingdom); Journal Volume: 72:5
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ZINC 65; ISOTOPIC EXCHANGE; CATIONS; CHEMICAL REACTION KINETICS; EQUILIBRIUM; ION EXCHANGE; LABELLED COMPOUNDS; MEDIUM TEMPERATURE; TRACER TECHNIQUES; ZEOLITES; ZINC CHLORIDES; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-ODD NUCLEI; HALIDES; HALOGEN COMPOUNDS; INORGANIC ION EXCHANGERS; INTERMEDIATE MASS NUCLEI; ION EXCHANGE MATERIALS; IONS; ISOTOPE APPLICATIONS; ISOTOPES; KINETICS; MINERALS; NUCLEI; RADIOISOTOPES; REACTION KINETICS; ZINC COMPOUNDS; ZINC HALIDES; ZINC ISOTOPES; 400203* - Isotope Exchange & Isotope Separation- (-1987)
OSTI ID:
7338810
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JCFTA
Submitting Site:
INIS
Size:
Pages: 1150-1156
Announcement Date:

Citation Formats

Radak, V M, Gal, I J, and Salai, J J. Isotopic exchange kinetics of zinc ions in Zn-A zeolite. United Kingdom: N. p., 1976. Web. doi:10.1039/f19767201150.
Radak, V M, Gal, I J, & Salai, J J. Isotopic exchange kinetics of zinc ions in Zn-A zeolite. United Kingdom. doi:10.1039/f19767201150.
Radak, V M, Gal, I J, and Salai, J J. 1976. "Isotopic exchange kinetics of zinc ions in Zn-A zeolite." United Kingdom. doi:10.1039/f19767201150. https://www.osti.gov/servlets/purl/10.1039/f19767201150.
@misc{etde_7338810,
title = {Isotopic exchange kinetics of zinc ions in Zn-A zeolite}
author = {Radak, V M, Gal, I J, and Salai, J J}
abstractNote = {The isotopic exchange kinetics of Zn/sup 2 +/ ions in hydrated Zn-A zeolite of composition (Znsub(5.55)Nasub(0.90)(A10/sub 2/)/sub 12/(Si0/sub 2/)/sub 12/.aq) have been investigated by measuring the fractional attainment of isotopic equilibrium between a ZnCl/sub 2/ solution and a /sup 65/Zn-labelled Zn-A zeolite (30 and 45 ..mu..m particle radii) as a function of time, in the temperature range 25 to 60/sup 0/C. The exchange mechanism is a two-step process which has been resolved, using the Brown-Sherry-Krambeck model (J.Phys.Chem.;75:3846(1971)) into diffusion in the solid particles, with Zn/sup 2 +/ diffusivity of D = 10sup(-3.97 + -0.03) exp(-Esub(D)/RT)m/sup 2/ s/sup -1/, Esub(D) = 67.1 +- 0.5 kJ molee/sup -1/, and an intracrystalline first-order exchange between bound and mobile Zn/sup 2 +/ ions in the network, with a rate constant of k/sub 2/ = 10sup(3.05 +- 0.25) exp(-Esub(k)/RT)s/sup -1/, Esub(k) = 56.5 +- 1.5 kJ mol/sup -1/.}
doi = {10.1039/f19767201150}
journal = {J. Chem. Soc. (London), Faraday Trans., I; (United Kingdom)}
volume = {72:5}
journal type = {AC}
place = {United Kingdom}
year = {1976}
month = {Jan}
}