Abstract
The phase-down of hydrofluorocarbons (HFCs) established by the Kigali Amendment to the Montreal Protocol is leading to the formulation and commercialization of new refrigerant blends containing hyd...
Highlights
Hydrofluorocarbons (HFCs) are fluorinated gases widely used in refrigeration and air conditioning (RAC) as substitutes for the ozone-depleting substances that were phased out under the Montreal Protocol (MP)
HFOs is 2,3,3,3-tetrafluoropropene (R1234yf, global warming potential (GWP) = 4), which is being currently used in pure form in mobile air conditioning systems by the automotive sector
The Henry’s law constants at infinite dilution were calculated and used to evaluate the enthalpy and entropy of solvation, which show that the absorption of large refrigerant molecules into Ionic liquids (ILs) is enthalpically favorable and exhibits unfavorable entropic contributions
Summary
Hydrofluorocarbons (HFCs) are fluorinated gases widely used in refrigeration and air conditioning (RAC) as substitutes for the ozone-depleting substances that were phased out under the Montreal Protocol (MP). Despite their zero ozone depletion potential (ODP), HFCs still exhibit high global warming potential (GWP), which makes them environmentally concerning greenhouse gases to be phased out under the Kigali Amendment to the MP. HFOs are mildly flammable (ASHRAE category A2L) and their use is constraint to a limited set of temperatures, affecting the refrigeration efficiency in refrigerators and freezers of commercial use when used as pure compounds.5–7 For these reasons, HFOs are usually blended with HFCs such as difluoromethane (R32, GWP = 675) and 1,1,1,2-tetrafluoroethane (R134a, GWP = 1430), which are very well-known refrigerants with a strong penetration in the RAC market. The efficient separation of refrigerant blends would promote a more circular economy in the RAC sector, whereby HFCs and HFOs recovered from end-of-life equipment are used to formulate novel low GWP blends.35 In this sense, ILs provide several benefits over conventional molecular solvents in the design of separation processes because solvent evaporation is avoided, and they are not flammable nor corrosive and do not release toxic vapors.. The solubility behavior is modeled using the non-random two-liquid activity coefficient model (NRTL)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: 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.
