Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
13416889 | The Journal of Chemical Thermodynamics | 2020 | 8 Pages |
Abstract
The compressed liquid densities of binary mixtures difluoromethane (R32) and 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) were measured using a high pressure vibrating-tube densimeter over the temperatures from (283 to 363) K and pressures up to 100â¯MPa at five different compositions, xR32â¯=â¯(0.189, 0.268, 0.500, 0.723, 0.904) in the present work. The combined expanded uncertainties of the temperature, pressure, mole fraction and the density with a level of confidence of 0.95 (kâ¯=â¯2) is estimated to be 16 mK, 0.062â¯MPa (pâ¯â¤â¯60â¯MPa), 0.192â¯MPa (60â¯MPaâ¯<â¯pâ¯<â¯100â¯MPa), 0.01 and up to 0.6â¯kg·mâ3 depending on the temperature and pressure ranges, respectively. The experimental data were correlated using the modified Tait equation. The isothermal compressibility, κT, and the isobaric thermal expansivity, αp, were determined using liquid densities of mixtures and modified-Tait equation. Furthermore, the relative deviations of the experimental data with the equation of state (EOS) from Akasaka were lower than 1% from (283 to 363) K with the pressure up to 40â¯MPa.
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Authors
Xinyue Jia, Jian Yang, Jiangtao Wu,