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Vapor-Liquid Equilibria of the FeSO4-Fe-2(SO4)(3)-H2SO4-H2O System at (30, 60, 90, and 101.3) kPa
Zhang, Yan; Li, Zhibao
2015-03-01
Source PublicationJOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN0021-9568
Volume60Issue:3Pages:947-954
Abstract

Vapor-liquid equilibrium (boiling point) data of the FeSO4-Fe-2(SO4)(3)H2SO4H2O system were measured by the quasi-static ebulliometric method at (30, 60, 90, and 101.3) kPa. The boiling points were found to increase with increasing concentrations of both the salts and the acid. By use of the thermodaynamic data (Delta(0)(Gf,298.15K), Delta H-f,298.15K(0), and S-f,298.15K(0)) of ferric complex ions (FeSO4+, Fe(SO4)(2), and FeHSO42+) predicted by Helgesons equation, a comprehensive thermodynamic model for the system was developed with the mixed-solvent electrolyte (MSE) model. Model parameters were determined via regressing our own experimental boiling points and the literature stoichiometric osmotic coefficients (phi(st)) of the Fe-2(SO4)(3)H2SO4H2O system. The average absolute deviations between the regressed boiling points and the experimental data were found to be (0.30 and 0.36) K for the Fe-2(SO4)(3)H2SO4H2O and FeSO4Fe2(SO4)(3)H2SO4H2O systems, respectively, while the average relative deviation for the stoichiometric osmotic coefficient was only 0.80 %. The model with newly obtained parameters was used to predict the distribution of iron-bearing species (Fe3+, FeSO4+, Fe(SO4)(2), and FeHSO42+) as functions of temperature and iron concentration. In addition, plots of the redox potential of Fe(III)/Fe(II) obtained from the literature versus ln(a(Fe3+)/a(Fe2+)) calculated by the newly obtained parameters are straight lines, indicating the good performance of the parameters.

KeywordSolvent Electrolyte Systems Sulfate-solutions Sulfuric-acid Aqueous-solutions Calcium-sulfate Ferric Sulfate Plus Ethanol Speciation Chalcopyrite Solubility
SubtypeArticle
Subject AreaChemistry ; Engineering
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/je5010142
Indexed BySCI
Language英语
WOS KeywordSolvent Electrolyte Systems ; Sulfate-solutions ; Sulfuric-acid ; Aqueous-solutions ; Calcium-sulfate ; Ferric Sulfate ; Plus Ethanol ; Speciation ; Chalcopyrite ; Solubility
Funding ProjectNational Natural Science Foundation of China [21476235, 21206165] ; National Basic Research Development Program of China (973 Program) [2013CB632605]
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000351186600063
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13820
Collection研究所(批量导入)
Corresponding AuthorLi, Zhibao
AffiliationChinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yan,Li, Zhibao. Vapor-Liquid Equilibria of the FeSO4-Fe-2(SO4)(3)-H2SO4-H2O System at (30, 60, 90, and 101.3) kPa[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2015,60(3):947-954.
APA Zhang, Yan,&Li, Zhibao.(2015).Vapor-Liquid Equilibria of the FeSO4-Fe-2(SO4)(3)-H2SO4-H2O System at (30, 60, 90, and 101.3) kPa.JOURNAL OF CHEMICAL AND ENGINEERING DATA,60(3),947-954.
MLA Zhang, Yan,et al."Vapor-Liquid Equilibria of the FeSO4-Fe-2(SO4)(3)-H2SO4-H2O System at (30, 60, 90, and 101.3) kPa".JOURNAL OF CHEMICAL AND ENGINEERING DATA 60.3(2015):947-954.
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