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Isopiestic measurements of water activities and thermodynamic modeling for CuCl2-MCl2-H2O (M = Mg, Ca) ternary system at t=298.15 K
Guo, Lijiang1; Zhou, Quanbao2; Zeng, Dewen3
2021-05-01
Source PublicationFLUID PHASE EQUILIBRIA
ISSN0378-3812
Volume535Pages:18
AbstractWater activities of the CuCl2-MCl2-H2O (M= Mg, Ca) ternary systems and their sub-binary systems have been measured by the isopiestic method at 298.15K. The maximum concentrations of the CuCl2-H2O, MgCl2-H2O and CaCl2-H2O binary systems are 5.28 mohkg(-1), 5.25 mohkg -1 and 6.61 mol.kg(-1), respectively. The concentrations of mixture solution rang from 0.91 mol.kg(-1) to 5.69 mol.kg(-1) for CuCl2-MgCl2-H2O system, and 1.29 mol.kg(-1) to 6.87 mol,kg(-1) for CuCl2-CaCl2-H2O system. The measured water activities of the sub-binary systems are consistent with the experimental results reported in literature. The measured equal water activities in the ternary systems strongly deviate from the Zdanovskii-Stokes-Robinson (ZSR) lines. The Pitzer model, Pitzer-Simonson-Clegg (PSC) model and Reaction model were selected to correlate and predict the water activity obtained in this work and the solubility reported in literature for the CuCl2-MCl2-H2O (M = Mg, Ca) ternary systems at 298.15 K. It was found that, the Pitzer model and PSC model cannot consistently represent these thermodynamic properties, with the binary and mixing parameters that already reported or fitted in this work. However, the Reaction model, representing the different competition association ability of common-anions and water molecules with different cations, can successfully predictethe water activity and solubility isotherms in these ternary systems at 298.15 K with binary parameters only. Applying the Reaction model, some examples of the Cu-bearing species distribution as a function of MgCl2 (CaCl2) molalities are given and used to account for how the structure variation of a electrolyte solution influences its macroproperties. (C) 2020 Elsevier B.V. All rights reserved.
KeywordWater activity Solubility Thermodynamic model Copper chloride Magnesium chloride Calcium chloride
DOI10.1016/j.fluid.2020.112933
Language英语
Funding ProjectNational Natural Science Foundation of China[U1707602] ; National Natural Science Foundation of China[21463010]
WOS Research AreaThermodynamics ; Chemistry ; Engineering
WOS SubjectThermodynamics ; Chemistry, Physical ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000634507100001
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48260
Collection中国科学院过程工程研究所
Corresponding AuthorGuo, Lijiang; Zhou, Quanbao; Zeng, Dewen
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.East China Univ Technol, Jiangxi Key Lab Mass Spectrometry & Instrumentat, Nanchang 330013, Jiangxi, Peoples R China
3.Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
Recommended Citation
GB/T 7714
Guo, Lijiang,Zhou, Quanbao,Zeng, Dewen. Isopiestic measurements of water activities and thermodynamic modeling for CuCl2-MCl2-H2O (M = Mg, Ca) ternary system at t=298.15 K[J]. FLUID PHASE EQUILIBRIA,2021,535:18.
APA Guo, Lijiang,Zhou, Quanbao,&Zeng, Dewen.(2021).Isopiestic measurements of water activities and thermodynamic modeling for CuCl2-MCl2-H2O (M = Mg, Ca) ternary system at t=298.15 K.FLUID PHASE EQUILIBRIA,535,18.
MLA Guo, Lijiang,et al."Isopiestic measurements of water activities and thermodynamic modeling for CuCl2-MCl2-H2O (M = Mg, Ca) ternary system at t=298.15 K".FLUID PHASE EQUILIBRIA 535(2021):18.
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