期刊
CHEMICAL ENGINEERING SCIENCE
卷 68, 期 1, 页码 328-339出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2011.09.040
关键词
Phase equilibria; Equation of state; Ternary solutions; Electrolytes; Osmotic coefficient; Mean ionic activity coefficient
资金
- German Society of Industrial Research (AiF) [16295N/1]
Liquid densities, osmotic coefficients, and mean ionic activity coefficients (MIAC) at 25 degrees C of single-salt alcohol (methanol and ethanol) solutions containing univalent ions were measured and modeled with the ePC-SAFT equation of state. In accordance with our previous work [Held, C., Cameretti, L.F., Sadowski, G., Fluid Phase Equlilib. 270 (2008) 87-96], only two solvent-specific ion parameters were adjusted to experimental solution densities and osmotic coefficients: the solvated ion diameter and the dispersion-energy parameter. ePC-SAFT was able to reproduce experimental data of the respective alcohol/salt systems with reasonable accuracy. Based on the solvent-specific ion-parameter sets, it is possible to predict densities and MIACs in ternary and quaternary water/alcohol(s)/salt solutions by introducing appropriate mixing rules that do not contain any additional fitting parameters. (C) 2011 Elsevier Ltd. All rights reserved.
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