Absorption of Fluorinated Greenhouse Gases Using Fluorinated Ionic Liquids

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Abstract

The increasing awareness of the environmental impact of fluorinated gases (F-gases) used in refrigeration is instigating the development of technologies to recover and recycle them. With this goal in mind, single-component absorption equilibrium isotherms at 303.15 K of F-gases in different ionic liquids (ILs) were determined using a gravimetric method. The selected F-gases are the most used in domestic refrigeration (R-32: difluoromethane, R-125: pentafluoroethane, and R-134a: 1,1,1,2-tetrafluoroethane). The results show that ILs containing a fluorinated alkyl side chain with four carbon atoms, that is, fluorinated ILs (FILs), have higher gas absorption capacity than conventional fluoro-containing ILs. All studied ILs showed ideal selectivity toward R-134a. Conventional fluoro-containing ILs showed better selectivities for the separation of the binary mixtures R-134a/R-125 and R-32/R-125, and FILs showed better selectivities for the R-134a/R-32 mixture. These results provide fundamental knowledge of the behavior of these new alternative solvents and key information for their application in the separation of F-gas mixtures of commercial refrigerants.

Original languageEnglish
Pages (from-to)20769-20778
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number45
DOIs
Publication statusPublished - 13 Nov 2019

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norflurane
Ionic Liquids
Ionic liquids
Greenhouse gases
Gases
Refrigeration
Gas absorption
Refrigerants
Binary mixtures
Gas mixtures
Isotherms
Environmental impact
Carbon
Atoms

Cite this

@article{92d179c996b844c8b48daa9a27041662,
title = "Absorption of Fluorinated Greenhouse Gases Using Fluorinated Ionic Liquids",
abstract = "The increasing awareness of the environmental impact of fluorinated gases (F-gases) used in refrigeration is instigating the development of technologies to recover and recycle them. With this goal in mind, single-component absorption equilibrium isotherms at 303.15 K of F-gases in different ionic liquids (ILs) were determined using a gravimetric method. The selected F-gases are the most used in domestic refrigeration (R-32: difluoromethane, R-125: pentafluoroethane, and R-134a: 1,1,1,2-tetrafluoroethane). The results show that ILs containing a fluorinated alkyl side chain with four carbon atoms, that is, fluorinated ILs (FILs), have higher gas absorption capacity than conventional fluoro-containing ILs. All studied ILs showed ideal selectivity toward R-134a. Conventional fluoro-containing ILs showed better selectivities for the separation of the binary mixtures R-134a/R-125 and R-32/R-125, and FILs showed better selectivities for the R-134a/R-32 mixture. These results provide fundamental knowledge of the behavior of these new alternative solvents and key information for their application in the separation of F-gas mixtures of commercial refrigerants.",
author = "Sosa, {Julio E.} and Ribeiro, {Rui P. P. L.} and Castro, {Paulo J.} and Mota, {Jos{\'e} P. B.} and Ara{\'u}jo, {Jo{\~a}o M. M.} and Pereiro, {Ana B.}",
note = "The authors would like to acknowledge the funding of the KET4F-Gas project, SOE2/P1/P0823, co -funded by the Interreg Sudoe Programme through the European Regional Development Fund (ERDF). A.B.P. and J.M.M.A. acknowledge FCT/MCTES for financial support through IF/00190/2014 contract and IF/00210/2014 contract, respectively. R.P.P.L.R. acknowledges financial support through the Norma TransitOria DL 57/2016 Program Contract (FCT/MCTES). This work was also supported by the Associate Laboratory for Green Chemistry LAQV, which is financed by national funds from FCT/MCTES (UID/QUI/50006/2019).",
year = "2019",
month = "11",
day = "13",
doi = "10.1021/acs.iecr.9b04648",
language = "English",
volume = "58",
pages = "20769--20778",
journal = "Industrial & Engineering Chemistry Research",
issn = "0888-5885",
publisher = "AMER CHEMICAL SOC",
number = "45",

}

TY - JOUR

T1 - Absorption of Fluorinated Greenhouse Gases Using Fluorinated Ionic Liquids

AU - Sosa, Julio E.

AU - Ribeiro, Rui P. P. L.

AU - Castro, Paulo J.

AU - Mota, José P. B.

AU - Araújo, João M. M.

AU - Pereiro, Ana B.

N1 - The authors would like to acknowledge the funding of the KET4F-Gas project, SOE2/P1/P0823, co -funded by the Interreg Sudoe Programme through the European Regional Development Fund (ERDF). A.B.P. and J.M.M.A. acknowledge FCT/MCTES for financial support through IF/00190/2014 contract and IF/00210/2014 contract, respectively. R.P.P.L.R. acknowledges financial support through the Norma TransitOria DL 57/2016 Program Contract (FCT/MCTES). This work was also supported by the Associate Laboratory for Green Chemistry LAQV, which is financed by national funds from FCT/MCTES (UID/QUI/50006/2019).

PY - 2019/11/13

Y1 - 2019/11/13

N2 - The increasing awareness of the environmental impact of fluorinated gases (F-gases) used in refrigeration is instigating the development of technologies to recover and recycle them. With this goal in mind, single-component absorption equilibrium isotherms at 303.15 K of F-gases in different ionic liquids (ILs) were determined using a gravimetric method. The selected F-gases are the most used in domestic refrigeration (R-32: difluoromethane, R-125: pentafluoroethane, and R-134a: 1,1,1,2-tetrafluoroethane). The results show that ILs containing a fluorinated alkyl side chain with four carbon atoms, that is, fluorinated ILs (FILs), have higher gas absorption capacity than conventional fluoro-containing ILs. All studied ILs showed ideal selectivity toward R-134a. Conventional fluoro-containing ILs showed better selectivities for the separation of the binary mixtures R-134a/R-125 and R-32/R-125, and FILs showed better selectivities for the R-134a/R-32 mixture. These results provide fundamental knowledge of the behavior of these new alternative solvents and key information for their application in the separation of F-gas mixtures of commercial refrigerants.

AB - The increasing awareness of the environmental impact of fluorinated gases (F-gases) used in refrigeration is instigating the development of technologies to recover and recycle them. With this goal in mind, single-component absorption equilibrium isotherms at 303.15 K of F-gases in different ionic liquids (ILs) were determined using a gravimetric method. The selected F-gases are the most used in domestic refrigeration (R-32: difluoromethane, R-125: pentafluoroethane, and R-134a: 1,1,1,2-tetrafluoroethane). The results show that ILs containing a fluorinated alkyl side chain with four carbon atoms, that is, fluorinated ILs (FILs), have higher gas absorption capacity than conventional fluoro-containing ILs. All studied ILs showed ideal selectivity toward R-134a. Conventional fluoro-containing ILs showed better selectivities for the separation of the binary mixtures R-134a/R-125 and R-32/R-125, and FILs showed better selectivities for the R-134a/R-32 mixture. These results provide fundamental knowledge of the behavior of these new alternative solvents and key information for their application in the separation of F-gas mixtures of commercial refrigerants.

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U2 - 10.1021/acs.iecr.9b04648

DO - 10.1021/acs.iecr.9b04648

M3 - Article

VL - 58

SP - 20769

EP - 20778

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 45

ER -