The equilibrium solubility of carbon dioxide in aqueous solutions of morpholine: Experimental data and thermodynamic modeling

Naser S. Matin, Joseph E. Remias, James K. Neathery, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Experimental carbon dioxide solubility data in aqueous 34.8 wt % (6.14 m) and 43.5 wt % (8.85 m) morpholine solutions at 40, 60, 100, and 120 °C are presented. The solubility measurements were done in a static vapor liquid equilibrium cell by measuring total pressure. Furthermore, selected data points were confirmed using gas phase GC methodology. The obtained combined solubility data was integrated with speciation data extracted using an established titration method, for thermodynamic modeling of the system. In regression of the model parameters, the liquid phase activity coefficients were determined using the electrolyte-NRTL equations. In addition to binary and pair interaction adjustable parameters included in the electrolyte-NRTL model, the temperature dependent carbamate stability and Henry's law constants for CO2 in pure morpholine were also calculated. The determined CO2 equilibrium properties are in good agreement with most of the experimental data.

Original languageEnglish
Pages (from-to)5221-5229
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume52
Issue number14
DOIs
StatePublished - Apr 10 2013

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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