A volumetric pitzer model for aqueous solutions of zinc sulfate up to near-saturation concentrations at temperatures from 293.15 to 393.15 K and pressures up to 10 MPa

T. Vielma; L. Hnědkovský; P. Uusi-Kyyny; J. Salminen; V. Alopaeus; U. Lassi; G. Hefter

doi:10.1021/acs.jced.0c00768

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A volumetric pitzer model for aqueous solutions of zinc sulfate up to near-saturation concentrations at temperatures from 293.15 to 393.15 K and pressures up to 10 MPa

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A volumetric pitzer model for aqueous solutions of zinc sulfate up to near-saturation concentrations at temperatures from 293.15 to 393.15 K and pressures up to 10 MPa

T. Vielma, L. Hnědkovský, P. Uusi-Kyyny, J. Salminen, V. Alopaeus, U. Lassi and G. Hefter

Journal of Chemical & Engineering Data, Vol.66(1), pp.58-64

2020

DOI: https://doi.org/10.1021/acs.jced.0c00768

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Abstract

Literature data for the volumetric properties of aqueous solutions of zinc sulfate have been compiled and compared with extensive recently available measurements. A semi-empirical Pitzer model has been derived from these data that reproduces the apparent molar volumes and compressibilities of zinc sulfate solutions with good accuracy to near-saturation concentrations (m ≲ 3.0 mol·kg–1) over the temperature range 293.15 ≤ T/K ≤ 393.15 and at pressures up to 10 MPa, using standard volumes, V°, obtained by additivity of ionic values from the literature. By including the dependence of V° on the compressibility of pure water, the model was able to predict apparent molar volumes with good accuracy even up to 100 MPa at 298 K. Of potential use for engineering applications, imposition of the inequality (∂2Vϕ/∂T2)p,m < 0 to the Pitzer model has created the possibility of physically reasonable extrapolations to temperatures well beyond the parameterization range.

Details

Title: A volumetric pitzer model for aqueous solutions of zinc sulfate up to near-saturation concentrations at temperatures from 293.15 to 393.15 K and pressures up to 10 MPa
Authors/Creators: T. Vielma (Author/Creator) - University of Oulu
L. Hnědkovský (Author/Creator) - Murdoch University
P. Uusi-Kyyny (Author/Creator) - Aalto University
J. Salminen (Author/Creator) - Boliden (Sweden)
V. Alopaeus (Author/Creator) - Aalto University
U. Lassi (Author/Creator) - University of Oulu
G. Hefter (Author/Creator) - Murdoch University
Publication Details: Journal of Chemical & Engineering Data, Vol.66(1), pp.58-64
Publisher: American Chemical Society
Identifiers: 991005542452707891
Murdoch Affiliation: Chemistry and Physics
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 2 Chemistry; 2.89 Ionic, Molecular & Complex Liquids; 2.89.462 Excess Molar Volumes
Web Of Science research areas: Chemistry, Multidisciplinary; Engineering, Chemical; Thermodynamics
ESI research areas: Chemistry