Multicomponent Refrigerant Separation Using Extractive Distillation with Ionic Liquids

Multicomponent Refrigerant Separation Using Extractive Distillation with Ionic Liquids
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DOI：
10.1021/acs.iecr.2c00937
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发表时间：
2022-06
期刊：
Industrial & Engineering Chemistry Research
影响因子：
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通讯作者：
Ethan A. Finberg;Tessie L. May;M. Shiflett
Ethan A. Finberg;Tessie L. May;M. Shiflett
中科院分区：
其他
文献类型：
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作者：
Ethan A. Finberg;Tessie L. May;M. Shiflett

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. ABSTRACT: Hydro fl uorocarbon refrigerants are being phased out over the next two decades due to concerns about high global warming potential. In order to separate refrigerant mixtures that form azeotropes, new technologies will be required. Currently, fractional distillation is unable to e ffi ciently separate azeotropic refrigerant mixtures. Extractive distillation using an ionic liquid as the entrainer o ff ers a solution. Vapor − liquid equilibria data for refrigerants di fl uoromethane (HFC-32), penta fl uoroethane (HFC-125), 1,1,1,2-tetra fl uoroethane (HFC-134a), 1,1,1-tri fl uoroethane (HFC-143a), chlorodi fl uoromethane (HCFC-22), propane (HC-290), and isobutane (HC-600a) and ionic liquid 1-butyl-3-methylimidazolium hexa fl uorophosphate ([C 4 C 1 im]- [PF 6 ]) was regressed using the Peng − Robinson equation of state with the van der Waals 1-parameter mixing rule and Boston − Mathias nonideal correction. Process fl ow diagrams using ASPEN simulations were prepared for demonstrating how multicomponent mixtures of these refrigerants can be separated. Opportunities for measuring and modeling the solubility of new refrigerants in ionic liquids are discussed, and challenges remain for e ff ectively separating some azeotropic refrigerant mixtures containing hydro fl uorocarbons and hydrocarbons.