(352h) Simultaneous Viscosity and Density Measurements of 2-Propanol, 2-Butanol, and 2-Pentanol at Temperatures between (291 and 353) K and Pressures up to 50 Mpa.

The viscosity is an important property for different applications in the chemical engineering mainly where the movement of the fluids control the process. Also, density is one of the most relevant properties in the industry, is required to develop and test equations of state, and especially in mass and moment balances. In particular, dynamic viscosity and density data of alcohols are of great importance in many industrial applications, such as cryogenic power generation systems, additive to gasoline, solvent in paints or pharmaceuticals, even to determine fundamental properties such as the coefficient of isothermal compressibility and the coefficient of isobaric thermal expansion. Accurate knowledge of these properties is required to ensure a better understanding and design of technical processes.

In this work, both dynamic viscosity (η) and density (ρ) for (2-propanol, 2-butanol, and 2-pentanol) were simultaneously measured covering a temperature range from 291 K to 349 K and pressures up to 50 MPa. The measurements were performed using a coil capillary viscometer coupled with a vibrating tube densimeter (VTD). The dynamic viscosity was obtained using the modified Hagen-Poiseuille model and the was calibrated by a new proposed empirical model. The relative expanded uncertainties were 0.8 % for the dynamic viscosity and 0.15 % for the density. Experimental dynamic viscosity and density data were successfully represented using two empirical models proposed by Pimentel-Rodas A. and Galicia-Luna L. A.