Abstract

In this work, the solid-liquid equilibrium (SLE) and vapor-liquid-liquid equilibrium (VLLE) were studied in a cryogenic mixture of difluoromethane (R32) + octafluoropropane (R218). The SLE was measured by a calorimetric method, while the VLLE was measured by a vapor-phase recirculation method for this binary mixture at temperatures ranging from 203.150 to 237.151 K. This binary mixture does not show the common eutectic behavior, and the temperatures of the liquidus line were invariable at different mole fraction. The experimental VLLE data was analyzed by the polynomial and the rectilinear diameter methods to obtain the second liquid phase compositions coexisting in equilibrium. Both methods show good agreement with the experimental data. The liquid phase split was observed below the upper critical end point (UCEP), which is 237.791 K based on the polynomial methods. Beside, a solid-liquid-liquid equilibrium (SLLE) of R32 + R218 was inferred based on the experimental data, which is utilized to explain the unusual experimental data in mixed refrigerants.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.