Correlation of liquid densities of some halogenated organic compounds

Experimental saturated and compressed liquid densities of 15 halogenated hydrocarbons have been correlated using the Hankinson-Thomson correlation and the liquid density model proposed by Aalto et al. New pure component parameters have been obtained and are reported here for the fluids studied, which are considered as potential alternative refrigerants. The compounds included in this work are trichlorofluoromethane (R11). chlorodifluoromethane (R22), 1,1-dichloro-2,2,2-trifluoroethane (R123), 1,2-dichloro-1,2,2-trifluoroethane (R123a), 1-chloro-1,2,2,2-tetrafluoroethane (R124), pentafluorodimethyl ether (E125), 1,1,2,2-tetrafluoroethane (R134), 1,1,1,2-tetrafluoroethane (R134a), 1,1-dichloro-1-fluoroethane (R141b), 1,1,2-trifluoroethane (R143), 1,1,1-trifluoroethane (R143a), 1,1-difluoroethane (R152a), octafluoropropane (R218), 1,1,1,2,2-pentafluoropropane (R245cb), and propane (R290). The overall average absolute deviation (AAD) obtained from the prediction of saturated liquid densities (328 data points) is 0.23%. In the prediction of compressed liquid densities, 8730 data points were studied and the overall AAD obtained is 0.34%. It is thus concluded that the Aalto et al. model is suitable for predicting liquid densities of halogenated hydrocarbons, and the accuracy is very good. Since the mixing rules are already available, it is expected that this model will be helpful in predicting densities for mixtures of halogenated hydrocarbons.