An experimental study of the viscometric and volumetric properties of octane-pentadecane n-alkane binary and ternary systems at several temperatures.

摘要

The viscosities and densities of five ternary C$sb8$-C$sb{15}$ n-alkane liquid systems and their corresponding eight binary subsystems have been measured at 293.15, 298.15, 308.15 and 313.15 K over the entire composition range. The experimental and literature viscosity data were used to test and modify some existing viscosity predictive models. The technique proposed earlier by Asfour et al. (1991) for the prediction of the dependence of viscosities of binary n-alkane systems on composition has been extended to cover ternary mixtures. A pseudo-binary mixture model has been developed in this study to modify the Generalized Corresponding States Principle (GCSP) proposed earlier by Teja and Rice (1981) for either prediction or correlation of the viscosity of liquid mixtures. The proposed modification of the GCSP method has the following advantages for n-alkane liquid mixtures having more than two components: (i) for the prediction of mixture viscosities, it does not require the selection procedure of reference fluids, thus eliminating the possible significant errors resulting from such a selection; (ii) for the correlation of mixture viscosities, it reduces the number of the binary interaction coefficients to one, no matter how many components are in a system. Obviously, this results in substantial cost and time savings. Two equations are proposed in this study as supplements to the original GCSP to make it more efficient; viz. (i) the first equation is concerned with the prediction of the interaction coefficient of the binary n-alkane systems from the pure component properties, (ii) the second equation provides a technique for the appropriate reference fluid selection when the original GCSP method is used for the viscosity prediction of ternary n-alkane liquid systems. Some literature excess property models have also been subjected to testing by using the excess property data calculated from the experimental viscometric and volumetric properties obtained in this study.Dept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses u26 Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .W955. Source: Dissertation Abstracts International, Volume: 53-12, Section: B, page: 6430. Supervisor: Abdul-Fattah A. Asfour. Thesis (Ph.D.)--University of Windsor (Canada), 1992.