Liquid-liquid equilibrium calculations for methanol-gasoline blends using continuous thermodynamics

F. Nasrollahi, Sh Roodpeyma, G. R. Vakili-Nezhaad

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This work presents the application of continuous thermodynamics to investigate the limited miscibility of methanol-gasoline blends. To predict the liquid-liquid equilibrium of these systems, the Gaussian distribution function was used to represent the composition of paraffins in the gasoline. The naphthenes and aromatics were represented by model compounds. A model has been developed using three different continuous versions of the UNIFAC model. Methanol is an associating component, and association affects phase equilibria. Therefore, the CONTAS (continuous thermodynamics of associating systems) model based on the Flory-Huggins equation, for multicomponent methanol-gasoline blends has also been investigated. The predicted results including the cloud point curve, shadow curve and phase separation data have been compared with experimental data and good agreement was found for the two UNIFAC and CONTAS models.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalFluid Phase Equilibria
Volume284
Issue number1
DOIs
Publication statusPublished - Oct 15 2009

Fingerprint

gasoline
Gasoline
Methanol
methyl alcohol
Thermodynamics
thermodynamics
Liquids
liquids
naphthenes
Gaussian distribution
paraffins
curves
normal density functions
Phase equilibria
Phase separation
Paraffin
Paraffins
Distribution functions
solubility
Solubility

Keywords

  • Associating systems
  • Cloud-shadow curves
  • CONTAS model
  • Continuous thermodynamics
  • Methanol-gasoline blends

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Liquid-liquid equilibrium calculations for methanol-gasoline blends using continuous thermodynamics. / Nasrollahi, F.; Roodpeyma, Sh; Vakili-Nezhaad, G. R.

In: Fluid Phase Equilibria, Vol. 284, No. 1, 15.10.2009, p. 1-9.

Research output: Contribution to journalArticle

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