P–ρ–T Data for 2-Butanol and tert-Butanol from 283.15 to 363.15 K and 303.15 to 363.15 K at Pressures up to 66 MPa

Abstract

We present densities of pure 2-butanol and tert-butanol from 283.15 to 363.15 K and 303.15 to 363.15 K at pressures up to 66 MPa. We have measured the densities using a vibrating tube densimeter, and the calibration of the apparatus uses the forced path calibration method (FPMC). This calibration method depends upon the mechanical properties of the cell and allows us to have a standard uncertainty in the density less than 0.0004 g/cm3. The new experimental densities of agree within 0.1% with densities in the literature.

Solution Thermodynamics of Benzotriazole in Different Pure Solvents

“… a The density of BTA and solvents were found from the literature. − b The molar volumes of BTA and solvents were calculated by eq . …”

P–ρ–T Data and Derived Volumetric Properties of Benzyl Alcohol, ±2-Octanol (Racemic Mixture), and 1-Heptanol from 283.15 to 363.15 K at Pressures up to 65 MPa

“…The radii differences in eq are defined as The subscripts i and e indicate the internal and external radiuses of the vibrating tube, respectively, and the subscript 0 refers to the vacuum. The calculation of r e and r i is done using , where P ref is the reference pressure; in this work, P ref = 0.0824 MPa was used, and the expression for the radius at vacuum is given by , where T ref is a reference temperature equal to 293.15 K, and the values for the reference radiuses at vacuum are r i 00 = 0.1073 cm and r e 00 = 0.1588 cm. The linear dilatation coefficient in eq is given by a cubic polynomial in temperature, In eq , ν is the Poisson’s coefficient, which is considered temperature-independent with a value equal to 0.307, and E is the Young’s modulus given by Then, the calibration parameters M 0 / L 0 , γ, and a i are obtained from a simultaneous correlation of eqs and to the experimental data of the oscillation period at vacuum and the oscillation period of water from 283.15 to 363.15 K and pressure up to 65 MPa.…”

“…The last five quantities are functions of temperature and pressure, and the last two are also evaluated at vacuum (P 0 ). The correction of the tube length with temperature and pressure is and the oscillating period at vacuum ,, is expressed by In the above equation, a i denotes fitting parameters. Laznickova and Huemer point out that the oscillating period at vacuum depends upon temperature and time ( t ).…”

“…The subscripts i and e indicate the internal and external radiuses of the vibrating tube, respectively, and the subscript 0 refers to the vacuum. The calculation of r e and r i is done using 28,35 ( )…”

P–ρ–TData and Derivative Properties of 3-Methylpentane, 2,4-Dimethylpentane, and 2,3,4-Trimethylpentane from 283.15 to 363.15 K at Pressures up to 65 MPa

“…This work is a continuation of our program in our laboratory about high-pressure measurements on fuel substances. In previous works, we have reported accurate experimental density data at high pressures for butyl alcohols. , Densities of branched hydrocarbons are important in the petroleum and fuel industry, high-pressure process design, development of accurate equations of state, and also in the understanding of the molecular behavior among n -alkanes and its isomers.…”