Measurements of PvT Properties, Vapor Pressures, Saturated Densities, and Critical Parameters for trans-1,1,1,4,4,4-Hexafluoro-2-butene (R1336mzz(E))

Abstract

Measurements of PvT properties, vapor pressures, saturated densities, and critical parameters were carried out for trans-1,1,1,4,4,4-hexafluoro-2-butene (R1336mzz­(E); CF3CHCHCF3). Thirty-nine PvT property data in the single phase region along seven isochores for R1336mzz­(E) were obtained in the temperatures between 333 and 410 K, pressures up to 5681 kPa, and densities between 52 and 1216 kg·m–3 by the isochoric method. Twenty-six vapor pressure data for R1336mzz­(E) were obtained in the temperatures between 287 K and the critical temperature and at pressures up to the critical pressure. Twenty-one saturated density data for R1336mzz­(E) were obtained by the observation of meniscus disappearance near the critical point and by the break point of isochores between 52 and 1216 kg·m–3 and the vapor-pressure curve. On the basis of these measurements, the critical parameters for R1336mzz­(E) were determined as T c = 403.53 ± 0.01 K, ρc = 513 ± 3 kg·m–3, and P c = 2779.2 ± 2.0 kPa. The vapor–pressure correlation is also discussed.

Assessment of Low Global Warming Potential Refrigerants for Drop-In Replacement by Connecting their Molecular Features to Their Performance

“…Correlation for polar soft-SAFT predicted VCC values of refrigerants examined in this work and their experimental critical properties from the literature. ,− ,− …”

“…This is done through linearly correlating predicted VCC values with the critical properties (i.e., critical temperature and pressure) of the pure refrigerants, indicating the accuracy of the predicted VCC values. The critical properties for each refrigerant were obtained from the literature, ,− ,− while VCC were directly predicted from polar soft-SAFT. As provided in Figure , the predicted VCC values and critical properties of the studied refrigerants indeed followed a linear correlation ( R 2 > 0.997), with the exception of R23.…”

Behavior of Isobaric Heat Capacity of trans-1,1,1,4,4,4-Hexafluoro-2-butene in the Gas Phase

“…The isotherms correspond to 0.813, 0.826, 0.838, 0.850, 0.863, 0.875, and 0.888 of reduced temperature, T r = T/T c . The reduced T and p are arranged with the critical temperature T c = 403.53 K 11 and the critical pressure p c = 2.7792 MPa. 11 Seven c p values referred to at 0 MPa c p,0 were carefully determined from the extrapolated isotherms in Figure 4.…”

“…The reduced T and p are arranged with the critical temperature T c = 403.53 K 11 and the critical pressure p c = 2.7792 MPa. 11 Seven c p values referred to at 0 MPa c p,0 were carefully determined from the extrapolated isotherms in Figure 4. The data are arranged in Table 3.…”

“…The isotherms correspond to 0.813, 0.826, 0.838, 0.850, 0.863, 0.875, and 0.888 of reduced temperature, T r = T / T c . The reduced T and p are arranged with the critical temperature T c = 403.53 K and the critical pressure p c = 2.7792 MPa …”