1 Department of Chemical and Biochemical Engineering, Technical University of Denmark2 Computer Aided Process Engineering Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark3 Universidade Estadual de Campinas4 Virginia Polytechnic Institute and State University
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.
Fluid Phase Equilibria, 2013, Vol 337, p. 53-59
Vapor pressure; Heat of vaporization; Fatty compounds; Biodiesel; Organic liquids; Group contributions