Double Freon Hydrates: Composition and Thermodynamic Properties

The paper presents the results of calculations of the P-T diagram of ice phase (liquid phase)-gas phase-hydrate phase equilibrium for freons R23 and R34a and 90%R23+10%R134a mixture. It is shown the freon R134a forms a stable CS-II hydrate phase in the temperature range of 260-280 K and pressure range of 0.0267-0.21 MPa and freon R23 creates a stable CS-I hydrate phase in the temperature range of 260-280 K and pressure range of 0.238-0.75 MPa. The calculation results are consistent with the known experimental data. It is shown that addition of 10% of R134a to the freon mixture results in the formation of CS-II hydrate phase in the temperature range of 260-280 K and pressure range of 0.0167-0.15 MPa.

Automated summary

The paper presents the calculated results of the P-T diagram for freons R23 and R34a, as well as a 90%R23+10%R134a mixture, in the ice phase-liquid phase-gas phase-hydrate phase equilibrium. It is shown that R134a forms a stable CS-II hydrate phase in the temperature range of 260-280 K and pressure range of 0.0267-0.21 MPa, while R23 forms a stable CS-I hydrate phase in the temperature range of 260-280 K and pressure range of 0.238-0.75 MPa. The calculations are consistent with the known experimental data. Additionally, it is found that the addition of 10% R134a to the freon mixture results in the formation of CS-II hydrate phase within the temperature range of 260-280 K and pressure range of 0.0167-0.15 MPa.