DESCRIPTION OF VAPOR-LIQUID AND VAPOR-SOLID EQUILIBRIA FOR A GROUP OFPOLYCONDENSED COMPOUNDS OF PETROLEUM INTEREST

Recommended data on vapour pressures above liquid and solid phases and enthalpies of vaporisation and sublimation were developed for six bas ic polycyclic hydrocarbons and dibenzothiophene which are considered a s model compounds for petroleum fractions and coal liquids. The recomm ended values are presented in the temperature range where reliable exp erimental data are available, mostly from about 220 K to about 550 K. The data are given in terms of parameters of the Cox vapour pressure c orrelation equation which has an identical form for the description of both vapour-solid and vapour-liquid equilibria. Equation parameters w ere developed by a simultaneous multi-property correlation of new expe rimental vapour pressures and liquid and solid heat capacities obtaine d in this work supplemented by critically selected literature values. (C) 1998 Elsevier Science B.V. All rights reserved.