화학공학소재연구정보센터
Fluid Phase Equilibria, Vol.194, 337-351, 2002
Remarks on computing the density of dense fluids by Aalto-Keskinen model
Aalto and Keskinen (Fluid Phase Equilibria 166 (1999) 183) propose a model for compressed liquid densities. In this model, the critical temperature and pressure are estimated from pseudocritical mixing rules and bubble point pressure from a correlation. In this work, an equation of state (EOS) is used to get more accurate critical properties and bubble point pressures. This extends the application range of the model, and one would expect to see improvement in accuracy, as well. Four alternatives are studied and it is found that the original model of Aalto and Keskinen (Fluid Phase Equilibria 166 (1999) 183) is the most accurate in density. On the other hand, the modification where the rigorous critical point and bubble point pressure is computed extends the application range. although it is not as accurate in density as the original model. 0 2002 Elsevier Science B.V. All rights reserved.