Phase equilibria of mixtures containing glycol and n-alkane

experimental study of infinite dilution activity coefficients and modeling using the cubic-plus-association equation of state

Waheed Afzal, Martin P Breil, Pascal Théveneau, Amir H Mohammadi, Georgios M Kontogeorgis, Dominique Richon

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this work, we report the infinite dilution activity coefficients for four n-alkanes (n-pentane, n-hexane, n-heptane, and n-octane) in monoethylene glycol in the temperature range from 298 to 334 K and at atmospheric pressure. Experimental data were measured using a previously described inert gas stripping technique. The new experimental data are compared with the literature data whenever possible. The experimental infinite dilution activity coefficients of several alkanes from n-pentane to n-hexadecane in monoethylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol previously reported in the literature, along with the data measured in this work have been modeled using the cubic-plus-association (CPA) equation of state (EoS). Satisfactory results have been obtained using temperature-independent interaction parameters. Useful remarks are presented about the application of infinite dilution activity coefficient data for estimating binary interaction parameters of the CPA EoS for the description of whole vapor−liquid equilibria. Furthermore, the variation in the values of the interaction parameters is discussed for different glycol systems.
Original languageEnglish
Pages (from-to)11202-11210
Number of pages9
JournalIndustrial & Engineering Chemistry Research
Volume48
Issue number24
Early online date9 Oct 2009
DOIs
Publication statusPublished - 16 Dec 2009

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Glycols
Alkanes
Activity coefficients
Equations of state
Phase equilibria
Paraffins
Dilution
Ethylene Glycol
Association reactions
Noble Gases
Heptane
Hexane
Atmospheric pressure
Temperature
Inert gases
n-heptane
octane
n-hexane

Cite this

Phase equilibria of mixtures containing glycol and n-alkane : experimental study of infinite dilution activity coefficients and modeling using the cubic-plus-association equation of state. / Afzal, Waheed; Breil, Martin P; Théveneau, Pascal; Mohammadi, Amir H; Kontogeorgis, Georgios M; Richon, Dominique.

In: Industrial & Engineering Chemistry Research, Vol. 48, No. 24, 16.12.2009, p. 11202-11210.

Research output: Contribution to journalArticle

Afzal, Waheed ; Breil, Martin P ; Théveneau, Pascal ; Mohammadi, Amir H ; Kontogeorgis, Georgios M ; Richon, Dominique. / Phase equilibria of mixtures containing glycol and n-alkane : experimental study of infinite dilution activity coefficients and modeling using the cubic-plus-association equation of state. In: Industrial & Engineering Chemistry Research. 2009 ; Vol. 48, No. 24. pp. 11202-11210.
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