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Title: Occlusion and ion exchange in the molten (lithium chloride + potassium chloride + alkaline earth chloride) salt + zeolite 4A system with alkaline earth chlorides of calcium and strontium, and in the molten (lithium chloride + potassium chloride + actinide chloride) salt + zeolite 4A system with the actinide chloride of uranium.

Abstract

The interaction between molten salts of the type LiCl-KCl-MeCl n (Me=Ca, Sr, U; x{sub MeCLn} $$ = to 0.45; and x {sub KCl}/x LiCl=0.69) and zeolite 4A have been studied at 823 K. The main interactions between these salts and zeolite are molten salt occlusion to form salt-loaded zeolite and ion exchange between the molten salt and salt-loaded zeolite. An irreversible chemical reaction has been observed in the LiCl-KCl-UCl{sup 3+}zeolite system. The extent of occlusion is a function of the concentration of MeCl n in the zeolite and is equal to 10{+-}1 Cl- per zeolite unit cell, (AlSiO{sub 4}){sub 12}, at infinite MeCl n dilution. The ion-exchange mole-fraction equilibrium constants (separation factors) with respect to Li are decreasing functions of the concentration of SrCl{sub 2} and UCl{sub 3}, but an increasing function of the concentration of CaCl{sub 2} in the zeolite. At infinite MeCl n dilution, they are equal to 0.9, 11.9, and 13 for CaCl{sub 2}, SrCl{sub 2}, and UCl{sub 3}, respectively. The standard ion-exchange chemical potentials are equal to -50.0, -84, and -101.1 kJ x mol-1 for Ca{sup 2+}, Sr{sup 2+}, and U{sup 3+}, respectively.

Authors:
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
NE
OSTI Identifier:
949686
Report Number(s):
ANL/CMT/JA-43306
Journal ID: ISSN 1073-5615; MTBSEO; TRN: US201012%%466
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Metall. Mater. Trans. B
Additional Journal Information:
Journal Volume: 34B; Journal Issue: 2 ; Apr. 2003; Journal ID: ISSN 1073-5615
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; ACTINIDES; CALCIUM; CHEMICAL REACTIONS; CHLORIDES; DILUTION; ION EXCHANGE; LITHIUM; MOLTEN SALTS; POTASSIUM CHLORIDES; STRONTIUM; URANIUM; ZEOLITES

Citation Formats

Lexa, D, and Chemical Engineering. Occlusion and ion exchange in the molten (lithium chloride + potassium chloride + alkaline earth chloride) salt + zeolite 4A system with alkaline earth chlorides of calcium and strontium, and in the molten (lithium chloride + potassium chloride + actinide chloride) salt + zeolite 4A system with the actinide chloride of uranium.. United States: N. p., 2003. Web. doi:10.1007/s11663-003-0007-z.
Lexa, D, & Chemical Engineering. Occlusion and ion exchange in the molten (lithium chloride + potassium chloride + alkaline earth chloride) salt + zeolite 4A system with alkaline earth chlorides of calcium and strontium, and in the molten (lithium chloride + potassium chloride + actinide chloride) salt + zeolite 4A system with the actinide chloride of uranium.. United States. https://doi.org/10.1007/s11663-003-0007-z
Lexa, D, and Chemical Engineering. Tue . "Occlusion and ion exchange in the molten (lithium chloride + potassium chloride + alkaline earth chloride) salt + zeolite 4A system with alkaline earth chlorides of calcium and strontium, and in the molten (lithium chloride + potassium chloride + actinide chloride) salt + zeolite 4A system with the actinide chloride of uranium.". United States. https://doi.org/10.1007/s11663-003-0007-z.
@article{osti_949686,
title = {Occlusion and ion exchange in the molten (lithium chloride + potassium chloride + alkaline earth chloride) salt + zeolite 4A system with alkaline earth chlorides of calcium and strontium, and in the molten (lithium chloride + potassium chloride + actinide chloride) salt + zeolite 4A system with the actinide chloride of uranium.},
author = {Lexa, D and Chemical Engineering},
abstractNote = {The interaction between molten salts of the type LiCl-KCl-MeCl n (Me=Ca, Sr, U; x{sub MeCLn} $$ = to 0.45; and x {sub KCl}/x LiCl=0.69) and zeolite 4A have been studied at 823 K. The main interactions between these salts and zeolite are molten salt occlusion to form salt-loaded zeolite and ion exchange between the molten salt and salt-loaded zeolite. An irreversible chemical reaction has been observed in the LiCl-KCl-UCl{sup 3+}zeolite system. The extent of occlusion is a function of the concentration of MeCl n in the zeolite and is equal to 10{+-}1 Cl- per zeolite unit cell, (AlSiO{sub 4}){sub 12}, at infinite MeCl n dilution. The ion-exchange mole-fraction equilibrium constants (separation factors) with respect to Li are decreasing functions of the concentration of SrCl{sub 2} and UCl{sub 3}, but an increasing function of the concentration of CaCl{sub 2} in the zeolite. At infinite MeCl n dilution, they are equal to 0.9, 11.9, and 13 for CaCl{sub 2}, SrCl{sub 2}, and UCl{sub 3}, respectively. The standard ion-exchange chemical potentials are equal to -50.0, -84, and -101.1 kJ x mol-1 for Ca{sup 2+}, Sr{sup 2+}, and U{sup 3+}, respectively.},
doi = {10.1007/s11663-003-0007-z},
url = {https://www.osti.gov/biblio/949686}, journal = {Metall. Mater. Trans. B},
issn = {1073-5615},
number = 2 ; Apr. 2003,
volume = 34B,
place = {United States},
year = {2003},
month = {4}
}