Viscosity and Density of n-Alcohols at Temperatures between (298.15 and 323.15) K and Pressures up to 30 MPa

Abstract

Experimental data of dynamic viscosity (η) and density (ρ) of pure alcohols (1-butanol, 1-pentanol, 1-heptanol, 1-octanol and 1-nonanol) are presented in the temperature range from (293.15 to 323.15) K and pressures up to 30 MPa. The data were obtained simultaneously, a capillary tube viscometer was used to measure the dynamic viscosity coupled with a vibrating tube densimeter where density is obtained. The expanded uncertainties (k = 2) of the reported data were estimated considering the impurities of the samples and are 0.90% and 0.10% for the dynamic viscosity and density measurements, respectively. Also, the dynamic viscosity and density data obtained in this study were modeled successfully as a function of pressure and temperature, through empirical equations previously published in literature. Finally, isothermal compressibilities and thermal isobaric expansivities were obtained using the density data set obtained.

Simultaneous Viscosity and Density Measurements and Modeling on Liquid Undecane, Dodecane, Tridecane, and Tetradecane up to 50 MPa

“…The density data obtained in this work were successfully modeled using the equation developed by Pimentel-Rodas and Galicia-Luna as follows (eq ) where v cal is the calculated specific volume in m 3 ·kg –1 (defined as the inverse of the density), P and T are the pressure in MPa and the temperature in K, respectively, and b i are the parameters fitted to the experimental specific volume data.…”

“…The effect of the temperature on the density at constant pressure is described by the isobaric thermal expansivity, and it is calculated as follows (eq ): The relative combined uncertainties for isothermal compressibility, u rc ( K T ), and for isobaric thermal expansivity, u rc (α P ), were estimated to be 0.02 according to the equations and procedure described in previous works. − …”

“…Density Model. The density data obtained in this work were successfully modeled using the equation developed by Pimentel-Rodas and Galicia-Luna as follows (eq 3) 20 = +…”

“…The relative expanded uncertainty ( k = 2) was estimated to be less than 1.4% for the dynamic viscosity and less than 0.2% for the density considering the impurities of the samples. Once the dynamic viscosity and density data were obtained, they were successfully represented with the equations proposed by Pimentel-Rodas and Galicia-Luna. , …”

“…Once the dynamic viscosity and density data were obtained, they were successfully represented with the equations proposed by Pimentel-Rodas and Galicia-Luna. 19,20…”