Estimation of Critical and Thermophysical Properties of Saturated Cyclic Alkanes by Group Contributions

Résumé

Group Contribution Methods (GCMs) of Marrero & Gani (M & G), Constantinou & Gani (C & G) and Lydersen (LYD) were employed in the prediction of some critical and thermophysical properties(TPPs), namely; critical temperature (Tc), critical pressure (Pc), critical volume (Vc), boiling temperature (Tb) and melting temperature (Tm), for various cycloalkanes. The predicted properties were compared with available experimental data. Experimental data for T m were unfortunately very scanty in the open literature; no comparison was done to appraise any of the methods. For Tc , LYD, C & G and M & G gave average relative deviation (ARD) values of 0.02%, 1.57% and 14.64%, respectively. In the case of Vc , ARD values for LYD, C & G and M & G are 2.6 %, 23.97 %, -4.53 %, respectively. Predicted P c values using the methods gave ARD of -31.55 %, -1.49 %, -277.98 %, respectively. C & G and M & G recorded ARD values of 0.63 % and 10.30 % for Tb , respectively.

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