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Hydrogen-bonding between HFCs and dimethyl ether.

Author(s) : BOBBO S., FEDELE L., CAMPORESE R., et al.

Summary

Analysis of VLE (Vapour Liquid Equilibrium) data for HFC + dimethyl ether (RE170) systems always show a strongly negative deviation from Raoult's law, as an effect of H-bonding between RE170 and HFC. This H-bonding was quantified through the excess Gibbs energy function obtained from the VLE data correlation by selected equations of state (EOS). Binary systems with the following HFCs: R125, R134a, R236ea, R236fa, and R227ea were included in the study. Two HCFCs (R22 and R142b) were also considered. The Gibbs energy values for the HFC systems formed by the same HFCs with propane (R290) as a homomorph of RE170. It is worth noting that HFC + R290 systems show strong positive deviations from Raoult's law with the formation of positive azeotropes, due to the strong repulsive forces between HFCs and R290.

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Pages: 2001-5

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Details

  • Original title: Hydrogen-bonding between HFCs and dimethyl ether.
  • Record ID : 2003-0039
  • Languages: English
  • Subject: HFCs alternatives
  • Source: Thermophysical Properties and Transfer Processes of New Refrigerants.
  • Publication date: 2001/10/03

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