Experimental determination of freezing point depressions in the CuSO4-H2SO4-H2O system

David Sibarani; Tuomas Vielma; Hannu Sippola; Daniel Lindberg

doi:10.1016/j.ces.2023.119670

Experimental determination of freezing point depressions in the CuSO₄-H₂SO₄-H₂O system

David Sibarani^*, Tuomas Vielma, Hannu Sippola, Daniel Lindberg

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Limited experimental data of the aqueous ternary CuSO₄-H₂SO₄-H₂O system hinders the modelling of its thermodynamic properties. Although different mixing rules for predicting the behavior of mixed electrolyte solutions have been proposed in the literature, significant deviations from them can be expected for systems where e.g., changes in speciation occur. In this work, freezing points of the ternary aqueous solutions were measured using a purpose-built apparatus. The measured samples spanned the concentration range 0.0140 to 0.5534 mol·(kg-H₂O)^–1 at four different CuSO₄–to–H₂SO₄ ratios. The experimental results were compared with Zdanovskii's rule predictions.

Original language	English
Article number	119670
Number of pages	6
Journal	Chemical Engineering Science
Volume	287
Early online date	12 Jan 2024
DOIs	https://doi.org/10.1016/j.ces.2023.119670
Publication status	Published - 5 Apr 2024
MoE publication type	A1 Journal article-refereed

Keywords

Aqueous system
Freezing point depression
Zdanovskii's rule

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10.1016/j.ces.2023.119670Licence: CC BY

CHEM_Sibarani_et_al_Experimental_determination_2024_Chemical_Engineering_ScienceFinal published version, 1.12 MBLicence: CC BY

Cite this

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title = "Experimental determination of freezing point depressions in the CuSO4-H2SO4-H2O system",

abstract = "Limited experimental data of the aqueous ternary CuSO4-H2SO4-H2O system hinders the modelling of its thermodynamic properties. Although different mixing rules for predicting the behavior of mixed electrolyte solutions have been proposed in the literature, significant deviations from them can be expected for systems where e.g., changes in speciation occur. In this work, freezing points of the ternary aqueous solutions were measured using a purpose-built apparatus. The measured samples spanned the concentration range 0.0140 to 0.5534 mol·(kg-H2O)–1 at four different CuSO4–to–H2SO4 ratios. The experimental results were compared with Zdanovskii's rule predictions.",

keywords = "Aqueous system, Freezing point depression, Zdanovskii's rule",

author = "David Sibarani and Tuomas Vielma and Hannu Sippola and Daniel Lindberg",

note = "Funding Information: This research is funded by the Finnish Natural Resources Research Foundation (Detailed aqueous solution chemistry for flotation circuits in Nordic conditions, Decision 20210033). Additional funding from the TOCANEM Project (Towards Carbon Neutral Metals, Business Finland grant 2118452 ) is also appreciated. Assistance by Dr. Petri Uusi-Kyyny in making the freezing point apparatus and usage of densimeter is greatly appreciated, as well as help from “Chemical Engineering in Aqueous Systems” and “Chemical Engineering” group members is acknowledged. Publisher Copyright: {\textcopyright} 2023 The Author(s)",

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doi = "10.1016/j.ces.2023.119670",

language = "English",

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AU - Sibarani, David

AU - Vielma, Tuomas

AU - Sippola, Hannu

AU - Lindberg, Daniel

N1 - Funding Information: This research is funded by the Finnish Natural Resources Research Foundation (Detailed aqueous solution chemistry for flotation circuits in Nordic conditions, Decision 20210033). Additional funding from the TOCANEM Project (Towards Carbon Neutral Metals, Business Finland grant 2118452 ) is also appreciated. Assistance by Dr. Petri Uusi-Kyyny in making the freezing point apparatus and usage of densimeter is greatly appreciated, as well as help from “Chemical Engineering in Aqueous Systems” and “Chemical Engineering” group members is acknowledged. Publisher Copyright: © 2023 The Author(s)

PY - 2024/4/5

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N2 - Limited experimental data of the aqueous ternary CuSO4-H2SO4-H2O system hinders the modelling of its thermodynamic properties. Although different mixing rules for predicting the behavior of mixed electrolyte solutions have been proposed in the literature, significant deviations from them can be expected for systems where e.g., changes in speciation occur. In this work, freezing points of the ternary aqueous solutions were measured using a purpose-built apparatus. The measured samples spanned the concentration range 0.0140 to 0.5534 mol·(kg-H2O)–1 at four different CuSO4–to–H2SO4 ratios. The experimental results were compared with Zdanovskii's rule predictions.

AB - Limited experimental data of the aqueous ternary CuSO4-H2SO4-H2O system hinders the modelling of its thermodynamic properties. Although different mixing rules for predicting the behavior of mixed electrolyte solutions have been proposed in the literature, significant deviations from them can be expected for systems where e.g., changes in speciation occur. In this work, freezing points of the ternary aqueous solutions were measured using a purpose-built apparatus. The measured samples spanned the concentration range 0.0140 to 0.5534 mol·(kg-H2O)–1 at four different CuSO4–to–H2SO4 ratios. The experimental results were compared with Zdanovskii's rule predictions.

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JO - Chemical Engineering Science

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Experimental determination of freezing point depressions in the CuSO₄-H₂SO₄-H₂O system

Abstract

Keywords

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TOCANEM, MTG: Towards Carbon Neutral Metals

Cite this

Experimental determination of freezing point depressions in the CuSO4-H2SO4-H2O system

Abstract

Keywords

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Projects

TOCANEM, MTG: Towards Carbon Neutral Metals

Cite this

Experimental determination of freezing point depressions in the CuSO₄-H₂SO₄-H₂O system