Gaseous Pvtx Properties for the Binary Mixtures of Carbon Dioxide (Co2) + Trans-1,3,3,3-Tetrafluoroprop-1-Ene (R1234ze(E)) and Carbon Dioxide (Co2) + 3,3,3-Trifluoropropene (R1243zf)

Abstract

The gaseous pvTx data of the binary mixtures for carbon dioxide (CO2)+trans-1,3,3,3-tetrafluoropyrop-1-ene (R1234ze(E)) and CO2+3,3,3-trifluooropyrop-ene (R1243zf) were experimentally measured at 5 isotherms from 333.15 K to 393.15 K. The experiment used a Burnett apparatus and the highest experimental pressure exceeded 7 MPa. The standard uncertainties of temperature, pressure and molar composition are 10 mK, 0.2~0.8 kPa and 0.0015, respectively. The relative uncertainty of the molar density is 0.05%. Based on the experimental data of pure components and mixtures, three-term truncated virial equations of state (EoS) were established. The relative root mean square deviation (RMSD) of the equations for density calculations of CO2+R1234ze(E) and CO2+R1243zf systems are 0.15% and 0.05%, respectively. The virial EoS obtained in this work was compared with REFPROP 10.0 and the literature data, and the virial coefficients were calculated and compared between the experimental value and the virial EoS.

Keywords: gaseous pvTx, Burnett method, virial EoS, carbon dioxide, R1243zf, R1234ze(E)