Speed of Sound Measurements of Binary Mixtures of trans-1,2-Difluoroethylene (R-1132(E)) with Difluoromethane (R-32) or 2,3,3,3-Tetrafluoropropene (R-1234yf)
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引用次数: 0
Abstract
The speed of sound of two binary mixtures containing 0.336 mole fraction trans-1,2-difluoroethylene (R-1132(E)) with difluoromethane (R-32) and 0.435 mole fraction R-1132(E) with 2,3,3,3-tetrafluoropropene (R-1234yf) was measured with a dual-path pulse-echo instrument. The speed of sound was measured along several pseudoisochores for each blend at temperatures ranging from 230 to 325 K for blends with R-32 and to 342 K for blends with R-1234yf. Measurements started at pressures just above each mixture’s bubble point pressure and were limited to 8 MPa to avoid potential disproportionation reactions of R-1132(E). The data were compared to multifluid models incorporating Helmholtz-energy-explicit equations of state (EOS) for each pure fluid. No binary interaction parameters for either the R-1132(E)/32 or R-1132(E)/1234yf system are currently available. Therefore, binary interaction parameters for chemically similar systems suggested by REFPROP version 10.0 were used. Deviations from the measured data to the EOS ranged from 5.5 to 11.0% for the R-1132(E)/32 system and from 0.4 to 1.8% for the R-1132(E)/1234yf system. These data will be used to refit the R-1132(E) EOS and fit mixture models for R-1132(E) blends with R-32 and R-1234yf.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.