New Correlations for Prediction of Critical Constants

Empirical correlations for critical constants can be grouped into two main branches of structural and nonstructural correlations. A new empirical correlation has been developed for critical constants of different classes of materials. This new approach which only needs the main structure of material and boiling temperature and molecular weight of each compound is called semi-structural and has proved to give successful predictions. Predictions of the new correlation have been compared with those of Riazi-Daubert method. New semi-structural correlation has proved to be more accurate generally .

کلیدواژه ها:

critical constant ، critical temperature ، critical pressure ، critical volume