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Type: Artigo de periódico
Title: Prediction of vapor pressure and heats of vaporization of edible oil/fat compounds by group contribution
Author: Ceriani, R
Gani, R
Liu, YA
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 mono-acylglycerols and hydrocarbons. This new methodology gives improved predictions when compared to a prior group contribution equation (Ceriani and Meirelles, 2004 [11) 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. (C) 2012 Elsevier B.V. All rights reserved.
Subject: Vapor pressure
Heat of vaporization
Fatty compounds
Organic liquids
Group contribution
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.fluid.2012.09.039
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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