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Phase Transition of FeSO4 center dot 7H(2)O to FeSO4 center dot H2O in the H2SO4-HCI-H2O System by Modeling Solubility
Zhou, Juan1,3; Zeng, Yan2; Demopoulos, George P.2; Li, Chunxi1; Li, Zhibao3
2018-02-01
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
Volume6Issue:2Pages:2207-2219
Abstract

A new sustainable process was developed to recycle FeSO4 center dot 7H(2)O produced from the sulfate process for titanium dioxide production. In this process, FeSO4 center dot H2O was crystallized out from a subsequent cooling crystallization operation rather than FeSO4 center dot 7H(2)O. In order to better develop the new process and provide a theoretical basis for ferrous sulfate dehydration, the study of the phase equilibrium of the FeSO4-H2SO4-HCl-H2O system is necessary. For this purpose, the solubility of FeSO4 center dot 7H(2)O in the H2SO4-HCl-H2O system was determined at a temperature range from 278.15 to 313.15 K using a dynamic method. By raising temperature and the concentration of HCl, more FeSO4 center dot 7H(2)O can be dissolved in this system. However, with the addition of H2SO4, the solubility of FeSO4 center dot 7H(2)O is found to decrease due to common-ion effect. A speciation-based model equipped with middle-range parameters was established by regressing the experimental and reported solubility of FeSO4 center dot 7H(2)O under varying conditions. The phase transition temperature of FeSO4 center dot 7H(2)O to FeSO4 center dot 7H(2)O was successfully predicted by the new model, which was found to decrease with increasing concentration of both H2SO4 and HCl.

KeywordFerrous Sulfate Heptahydrate Solubility Phase Transition Mixed-solvent Electrolyte Model Parameters
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/acssuschemeng.7b03627
Indexed BySCI
Language英语
WOS KeywordTitanium-dioxide Production ; Ferrous Sulfate ; Na2sio3-center-dot-9h(2)o ; Electrolytes ; Equilibria ; Rutile ; Waste
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21476235 ; 21506218 ; U1407112)
WOS IDWOS:000424728300075
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24007
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
2.McGill Univ, Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Juan,Zeng, Yan,Demopoulos, George P.,et al. Phase Transition of FeSO4 center dot 7H(2)O to FeSO4 center dot H2O in the H2SO4-HCI-H2O System by Modeling Solubility[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(2):2207-2219.
APA Zhou, Juan,Zeng, Yan,Demopoulos, George P.,Li, Chunxi,&Li, Zhibao.(2018).Phase Transition of FeSO4 center dot 7H(2)O to FeSO4 center dot H2O in the H2SO4-HCI-H2O System by Modeling Solubility.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(2),2207-2219.
MLA Zhou, Juan,et al."Phase Transition of FeSO4 center dot 7H(2)O to FeSO4 center dot H2O in the H2SO4-HCI-H2O System by Modeling Solubility".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.2(2018):2207-2219.
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