Experimental determination of freezing point depressions in the CuSO4-H2SO4-H2O system
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-04-05
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Language
en
Pages
6
Series
Chemical Engineering Science, Volume 287
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.Description
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)
Keywords
Aqueous system, Freezing point depression, Zdanovskii's rule
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Citation
Sibarani, D, Vielma, T, Sippola, H & Lindberg, D 2024, ' Experimental determination of freezing point depressions in the CuSO 4 -H 2 SO 4 -H 2 O system ', Chemical Engineering Science, vol. 287, 119670 . https://doi.org/10.1016/j.ces.2023.119670