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Fundamentals to commercialization: using membranes, porous media, and ionic liquids for the separation of azeotropic refrigerant mixtures.

Number: 0618

Author(s) : SHIFLETT M. B., BACA K. R., HARDERS A. N., YANCEY A. D., FINBERG E. A., Al-BARGHOUTI K., SCURTO A. M.

Summary

Project EARTH (Environmentally Applied Research Toward Hydrofluorocarbons) is a collaborative project between the University of Kansas, University of Notre Dame, Texas A&M University, and Rutgers University that is focused on developing sustainable and selective separation processes for azeotropic refrigerant mixtures. The current hydrofluorocarbon (HFC) refrigerants are being phased down over the next 10-20 years due to concerns over the high Global Warming Potential (GWP) according to the 2020 AIM Act, 2017 EU Parliament, and 2016 Kigali Agreement. Three approaches are under development for separation of azeotropic refrigerant mixtures using advanced materials such as ionic liquids, porous media, and membranes.
This presentation will focus on the physical property measurements, equation of state modeling, and lab-scale separation processes for refrigerant mixture R-410A, an azeotropic mixture composed of 50 mass% difluoromethane (HFC-32, CH2F2) and 50 mass% pentafluoroethane (HFC-125, CHF2CF3). The presentation will highlight several specialized analytical instruments for measuring refrigerant vapor-liquid-equilibria (VLE) and diffusivity data using Hiden Isochema IGA and XEMIS gravimetric microbalances. In addition, the first mixed gas sorption and selectivity results using a XEMIS microbalance with the Integral Mass Balance (IMB) method will be presented. A unique high-pressure densitometer and viscometer will be shown that measures solution density and viscosity of refrigerants in ionic liquids over a wide range of T and P. A Setaram calvet calorimeter has been utilized to measure heat of sorption of refrigerants in porous media and ionic liquids and compared with calculated heats from VLE data. A lab-scale membrane module and packed bed system provide selectivity for flowing mixed gas systems, and a pilot-scale extractive distillation column using an ionic liquid entrainer provides the first continuous demonstration of the technology.

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Details

  • Original title: Fundamentals to commercialization: using membranes, porous media, and ionic liquids for the separation of azeotropic refrigerant mixtures.
  • Record ID : 30031552
  • Languages: English
  • Subject: HFCs alternatives
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0618

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