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Vol. 27 No. 8 (2015): Vol 27 Issue 8

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Metastable Solubilities and Thermodynamic Properties of SrSO4 Scale at 278.2 to 323.2 K

https://doi.org/10.14233/ajchem.2015.18281
Cui Wei
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu 610059, P.R. China
Shi-Hua Sang
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu 610059, P.R. China; Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu 610059, P.R. China
Juan-Xin Hu
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu 610059, P.R. China
Da-Wei Li
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China
Si-Yao Zhong
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China
Wang-Yin Huang
College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P.R. China

Corresponding Author(s) : Shi-Hua Sang

sangshihua@sina.com.cn; sangsh@cdut.edu.cn

Asian Journal of Chemistry, Vol. 27 No. 8 (2015): Vol 27 Issue 8

Abstract

In this paper, the isothermal evaporation method was used to determine the metastable solubilities of strontium sulfate (SrSO4) at (278.2, 283.2, 303.2 and 323.2) K. During the evaporation progress, the concentrations of SrSO4 were measured at a period time and a set of the results were fitted to empirical equations of evaporating times. The metastable solubilities were determined by the maximum concentration and the metastable region of SrSO4 at 278.2 to 323.2 K was determined. By using simplified Pitzer equations and metastable solubilities at the given temperatures, the thermodynamic properties of SrSO4 (g±, F, GE) were calculated and all the calculated results were compared with the stable values calculated by the literature solubilities in this work. Then the thermodynamic ion product (Qsp) of SrSO4 were calculated and compared with the thermodynamic solubility product (Ksp) of SrSO4 at different temperatures.

Keywords

Strontium sulfate Metastable solubility Metastable region Thermodynamic property
Wei, C., Sang, S.-H., Hu, J.-X., Li, D.-W., Zhong, S.-Y., & Huang, W.-Y. (2015). Metastable Solubilities and Thermodynamic Properties of SrSO4 Scale at 278.2 to 323.2 K. Asian Journal of Chemistry, 27(8), 2899–2904. https://doi.org/10.14233/ajchem.2015.18281
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