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Title: Isopiestic measurements of thermodynamic properties for the aqueous system LiBr–CaBr2–H2O at 373.15 K

Abstract

In this study, the isopiestic molalities for the systems LiBr–H2O, CaBr2–H2O and LiBr–CaBr2–H2O were measured at 373.15 K with the isopiestic method using the Oak Ridge National Laboratory (ORNL) high–temperature gravimetric isopiestic apparatus. The osmotic coefficients were determined based on the lithium chloride and sodium chloride reference standards. The vapor pressure diagrams and osmotic coefficient diagrams at different mole fraction for LiBr were plotted. The calculated vapor pressure with water activities agree well with the experimental data. On the basis of Pitzer original and its extended model, the Pitzer binary parameters β(0), β(1)C(0) and C(1) for the systems LiBr–H2O and CaBr2–H2O and mixing parameters of θLi,Ca and ψLi,Ca,Br were fitted with the measured osmotic coefficients. The calculated osmotic coefficients for systems LiBr–H2O and CaBr2–H2O agree well with the experimental data. The agreement between the calculated water activities and experimental results for the ternary system indicates that the parameters obtained in this work are reliable for water activity calculation. Finally, the thermodynamic data obtained in this study are essential for development of universal thermodynamic models for brine systems containing lithium bromide and calcium bromide.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3];  [4]
  1. Linyi University (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tianjin University of Science and Technology (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Tianjin University of Science and Technology (China)
  4. Linyi University (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
OSTI Identifier:
1490618
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Thermodynamics
Additional Journal Information:
Journal Volume: 129; Journal Issue: C; Journal ID: ISSN 0021-9614
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Osmotic coefficients; Vapor pressure; Lithium bromide; Calcium bromide; Pitzer thermodynamic model

Citation Formats

Meng, Lingzong, Gruszkiewicz, Miroslaw S., Deng, Tianlong, Guo, Yafei, and Li, Dan. Isopiestic measurements of thermodynamic properties for the aqueous system LiBr–CaBr2–H2O at 373.15 K. United States: N. p., 2018. Web. https://doi.org/10.1016/j.jct.2018.09.018.
Meng, Lingzong, Gruszkiewicz, Miroslaw S., Deng, Tianlong, Guo, Yafei, & Li, Dan. Isopiestic measurements of thermodynamic properties for the aqueous system LiBr–CaBr2–H2O at 373.15 K. United States. https://doi.org/10.1016/j.jct.2018.09.018
Meng, Lingzong, Gruszkiewicz, Miroslaw S., Deng, Tianlong, Guo, Yafei, and Li, Dan. Thu . "Isopiestic measurements of thermodynamic properties for the aqueous system LiBr–CaBr2–H2O at 373.15 K". United States. https://doi.org/10.1016/j.jct.2018.09.018. https://www.osti.gov/servlets/purl/1490618.
@article{osti_1490618,
title = {Isopiestic measurements of thermodynamic properties for the aqueous system LiBr–CaBr2–H2O at 373.15 K},
author = {Meng, Lingzong and Gruszkiewicz, Miroslaw S. and Deng, Tianlong and Guo, Yafei and Li, Dan},
abstractNote = {In this study, the isopiestic molalities for the systems LiBr–H2O, CaBr2–H2O and LiBr–CaBr2–H2O were measured at 373.15 K with the isopiestic method using the Oak Ridge National Laboratory (ORNL) high–temperature gravimetric isopiestic apparatus. The osmotic coefficients were determined based on the lithium chloride and sodium chloride reference standards. The vapor pressure diagrams and osmotic coefficient diagrams at different mole fraction for LiBr were plotted. The calculated vapor pressure with water activities agree well with the experimental data. On the basis of Pitzer original and its extended model, the Pitzer binary parameters β(0), β(1)C(0) and C(1) for the systems LiBr–H2O and CaBr2–H2O and mixing parameters of θLi,Ca and ψLi,Ca,Br were fitted with the measured osmotic coefficients. The calculated osmotic coefficients for systems LiBr–H2O and CaBr2–H2O agree well with the experimental data. The agreement between the calculated water activities and experimental results for the ternary system indicates that the parameters obtained in this work are reliable for water activity calculation. Finally, the thermodynamic data obtained in this study are essential for development of universal thermodynamic models for brine systems containing lithium bromide and calcium bromide.},
doi = {10.1016/j.jct.2018.09.018},
journal = {Journal of Chemical Thermodynamics},
number = C,
volume = 129,
place = {United States},
year = {2018},
month = {9}
}

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