Prediction of vapor pressure and heats of vaporization of edible oil/fat compounds by group contribution

Roberta Ceriani, Rafiqul Gani, Y.A. Liu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In the present work, a group contribution method is proposed for the estimation of vapor pressures and heats of vaporization of organic liquids found in edible fat/oil and biofuel industries as a function of temperature. The regression of group contribution parameters was based on an extensive databank (2036 values) composed by fatty compounds, i.e., fatty acids, methyl-, ethyl-, propyl- and butyl- esters, fatty alcohols, tri-, di- and monoacylglycerols and hydrocarbons. This new methodology gives improved predictions when compared to a prior group contribution equation (Ceriani and Meirelles, 2004) due to the inclusion of new experimental data for fatty esters and partial acylglycerols (besides hydrocarbons) and critical points, and a new temperature dependency. Heats of vaporization are properly described as a function of reduced temperature up to the critical condition.
Original languageEnglish
JournalFluid Phase Equilibria
Volume337
Pages (from-to)53-59
ISSN0378-3812
DOIs
Publication statusPublished - 2013

Keywords

  • Vapor pressure
  • Heat of vaporization
  • Fatty compounds
  • Biodiesel
  • Organic liquids
  • Group contributions

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