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Investigation on solid-liquid equilibrium for trifluoromethane (R23) plus difluoromethane (R32) binary system.

Author(s) : WANG X., ZHAO Y., DONG X., YAO X., WANG J., GUO H., GONG M.

Type of article: IJR article

Summary

In this paper, an experimental apparatus based on a Calvet calorimeter (SETARAM BT2.15) was setup to measure the solid – liquid equilibrium for trifluoromethane (R23) plus difluoromethane (R32) binary system. The melting points of some pure alkanes and hydrofluorocarbons were measured to verify the accuracy of the apparatus, revealing a good consistency with the literature. Totally 20 different compositions of the R23 + R32 system in the temperature range from 107.00 K to 137.00 K were experimentally measured, which showed a eutectic behavior. The eutectic temperature is 107.50 ± 0.5 K with the latent heat of fusion of 67.13 J/g, and the mole fraction of R23 at the eutectic point is calculated to be 0.641 by Tamman's plot method. Moreover, the results for the solid – liquid equilibrium of the R23 + R32 system showed a good agreement with the prediction provided by the Schröder equation, with the deviation of eutectic temperature less than 1 K.

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Pages: 238-245

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Details

  • Original title: Investigation on solid-liquid equilibrium for trifluoromethane (R23) plus difluoromethane (R32) binary system.
  • Record ID : 30028301
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 126
  • Publication date: 2021/06
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.01.033

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