Determination of Pitzer Parameters for 1-1 Nitrate and 1-2 Sulfate Solutions from Freezing Point Data

Mehdi Hasan*, Marjatta Louhi-Kultanen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

Freezing point depression (FDP) modeling was performed for selected aqueous nitrate and sulfate salt solutions to evaluate Pitzer ion interaction parameter values at 273.15K. 1-1 and 1-2 electrolyte solutions of NaNO3, KNO3, NH4NO3, Na2SO4, K2SO4, and (NH4)2SO4 were studied. New Pitzer parameter values of β0, β1, and Cφ{symbol} were obtained for the studied electrolyte solutions. FDP modeling was also used to determine temperature derivatives of interaction parameters for the Pitzer model for selected salt solutions. Osmotic and activity coefficients using the new parameter values are also presented.

Original languageEnglish
Pages (from-to)1340-1346
Number of pages7
JournalChemical Engineering and Technology
Volume37
Issue number8
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Freeze crystallization
  • Freezing point depression
  • Ion interaction parameter
  • Pitzer model
  • Solid-liquid equilibrium

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