Density and vapour pressure of mixed-solvent desiccant systems (propylene glycol or dipropylene glycol or tripropylene glycol plus magnesium chloride plus water)

作者：Chen Shang Yi; Soriano Allan N; Leron Rhoda B; Li Meng Hui^*

来源：Journal of Chemical Thermodynamics, 2014, 79: 235-241.

DOI：10.1016/j.jct.2014.08.005

• Density
• Dipropylene glycol
• Propylene glycol
• Tripropylene glycol
• Vapour pressure

In this present work, new experimental data for density and vapour pressure of the mixed-solvent desiccant systems containing {40 wt% glycol (propylene or dipropylene or tripropylene) + (4 or 9 or 16 wt%) magnesium chloride salt + water} were reported for temperatures up to 343.15 K at normal atmospheric condition. The density and vapour pressure data obtained are presented as a function of temperature and composition. An empirical equation was used to correlate the temperature and compositional dependence of the density values. A model based on the mean spherical approximation for aqueous electrolyte solutions incorporating the pseudo-solvent approach was used to represent the vapour pressure as a function of temperature and composition. Satisfactory results were obtained for both density and vapour pressure calculations.

• 出版日期2014-12