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Development of vapor pressure model for mixed liquid desiccants near saturated solubility.

Number: pap. n. 388

Author(s) : CHE C., YIN Y.

Summary

A statistical thermodynamic model is proposed to predict the vapor pressure of mixed liquid desiccant solutions near saturated solubility by re-quantifying the weight of interactions between all species in solution. The model considers that charge interaction between ions and non-charge interaction between all species are still dominant, and charge-dipole interaction between ions and solvent molecules increases with the increase of solute concentration. Rigorous expressions are given to calculate the interactions: ion-ion charge interaction is described by modifying the FowlerGuggenheim theory, charge-dipole interaction is expressed by combining the McMillan-Mayer osmotic coefficient theory with the Debye-Hückel theory, and non-charge interaction is calculated based on the extended UNIQUAC equation. The prediction accuracy comparison with two typical models shows that the new model has better accuracy for mixed liquid desiccants near saturated solubility.

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Pages: 8

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Details

  • Original title: Development of vapor pressure model for mixed liquid desiccants near saturated solubility.
  • Record ID : 30025988
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0388

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