THERMODYNAMIC PROPERTIES OF R13 (CCIF3), R23 (CHF3), R152a (C2H4F2), AND PROPANE HYDRATES FOR DESALINATION OF SEA WATER

HIRONOBU KUBOTA; KUNIHIKO SHIMIZU; YOSHIYUKI TANAKA; TADASHI MAKITA

doi:10.1252/jcej.17.423

THERMODYNAMIC PROPERTIES OF R13 (CCIF₃), R23 (CHF₃), R152a (C₂H₄F₂), AND PROPANE HYDRATES FOR DESALINATION OF SEA WATER

HIRONOBU KUBOTA, KUNIHIKO SHIMIZU, YOSHIYUKI TANAKA, TADASHI MAKITA

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Keywords: High Pressure, Phase Equilibrium, Gas Hydrate, Hydrate Formation Condition, Sea Water Desalination, Chlorotrifluoromethane, Trifluoromethane, 1,1-Difluoroethane, Propane

JOURNAL FREE ACCESS

1984 Volume 17 Issue 4 Pages 423-429

DOI https://doi.org/10.1252/jcej.17.423

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Abstract

The objective of this investigation was to obtain basic data which are necessary to develop a new hydrate process for desalination of sea water.
Three new hydrating agents, R13 (CC1F₃), R23 (CHF₃) and R152a (C₂H₄F₂), and propane were selected. The pressure-temperature phase diagrams of each agent for pure water and aqueous NaCl solution were determined in the temperature range from 260 to 295 K and pressures up to 4.4 MPa.
Based on the pressure-temperature data obtained, the necessary thermodynamic data, such as hydrate decomposition conditions, invariant points, heat of formation, and hydrate composition were determined.

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