Densities and Viscosities of the Regular Quinary System: Benzene (1) + Toluene (2) + Ethylbenzene (3) + Heptane (4) + Cyclooctane (5) and Its Quaternary Sub-Systems at 293.15 and 298.15 K

• DOI: 10.1007/s10953-012-9950-0
• Publication Date: 2013-01-11T10:48:06Z
• Authors: Hanan E. M. El-Sayed; Abdul-Fattah A. A...
• Keywords: Cyclooctane; Quinary; Heptane; Cycloheptane; Ternary numeral system

The densities and viscosities of the regular quinary system: benzene (1) + toluene (2) + ethylbenzene (3) + heptane (4) + cyclooctane (5), and all its corresponding quaternary sub-systems were measured over the entire composition range at 293.15 and 298.15 K. Kinematic viscosity–composition data reported in the present study were utilized to test the predictive capability of some well-known viscosity models. The models subjected to testing were: the predictive version of the McAllister’s three-body model, a generalized corresponding states principle, the group contribution GC-UNIMOD method, and the Allan and Teja correlation. Results of testing these models led to an overall AAD (%) of 1.20 for the one quaternary system that did not contain cyclooctane, and an overall AAD (%) of 8.59 for the remaining cyclooctane-containing systems. For the quinary system, the overall AAD (%) was found to be 2.92; the last two values were calculated using the value of cyclooctane of 10.595.