Measurements of Vapor Pressures from 280 to 369 K and (p, ρ, T) Properties from 340 to 400 K at Pressures to 200 MPa for Propane

Abstract

Measurements of (p, ρ, T) properties for compressed liquid propane have been obtained by means of a metal-bellows variable volumometer at temperatures from 340 to 400 K at pressures up to 200 MPa. The volumefraction purity of the propane sample was 0.9999. The expanded uncertainties (k = 2) of temperature, pressure, and density measurements have been estimated to be less than 3 mK; 1.5 kPa (p < = 7 MPa), 0.06% (7 MPa<p < = 50 MPa), 0.1% (50 MPa<p < = 150 MPa), and 0.2% (p>150 MPa); and 0.11%, respectively. Four (p, ρ, T) measurements at the same temperatures and pressures as literature values have been conducted for comparisons. In addition, vapor pressures were measured at temperatures from 280 to 369 K. Furthermore, comparisons of available equations of state with the present measurements are reported.

Saturated liquid densities of propane at T = (280 to 365) K

“…Moreover, sufficiently close to the vapour pressure at this temperature below p = 3.6 MPa, most data in these three series can be represented by a linearly smoothed line within ±0.07% as shown in figure 7. Based on these pqT property data and our previously measured vapour pressure values [3], we determined the saturated liquid density data at each temperature. Our values are given in table 2 along with our vapour pressure measurements for propane [3].…”

“…Based on these pqT property data and our previously measured vapour pressure values [3], we determined the saturated liquid density data at each temperature. Our values are given in table 2 along with our vapour pressure measurements for propane [3].…”

“…The measurements were carried out using the apparatus employed in the previous work [1][2][3]. The experimental procedures are described in detail elsewhere [2,15].…”

“…After completing such pqT property measurements on each isotherm, the saturated liquid density data at each temperature were determined as the point of intersect between the isotherm and our previously determined vapour pressure value [3].…”

“…In a previous publication we reported vapour pressure and pqT measurements for isobutane [1,2] and propane [3] obtained using a metal-bellows variable volumometer. In this study, we determined the saturated liquid density data for propane, using the same apparatus in the temperature range from (280 to 365) K.…”