Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid
In this study, trifluoromethane (R-23) has been adsorbed on three zeolites, namely 5A, LSX and 13X, and their adsorption isotherms have been measured at approximately 298 and 323 K using a gravimetric microbalance. All cases belong to the adsorption Type II (one of the six IUPAC classifications), an...
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SAGE Publishing
2013-02-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.31.1.59 |
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| author | Mark B. Shiflett David R. Corbin A. Yokozeki |
| author_facet | Mark B. Shiflett David R. Corbin A. Yokozeki |
| author_sort | Mark B. Shiflett |
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| description | In this study, trifluoromethane (R-23) has been adsorbed on three zeolites, namely 5A, LSX and 13X, and their adsorption isotherms have been measured at approximately 298 and 323 K using a gravimetric microbalance. All cases belong to the adsorption Type II (one of the six IUPAC classifications), and the adsorption (and desorption) processes are reversible. Three different adsorption models [original Langmuir, multi-site Langmuir and BET equations] have been adopted to analyze the data, with a particular interest in calculating the heat of adsorption (–ΔH), which was found to be about 10, 30 and 40 kJ·mol −1 for zeolite 5A, LSX and 13X, respectively. These values are within the range of typical physical adsorptions. Solubility of R-23 in ionic liquid 1-octyl-3-methylimidazolium 1,1,2,2-tetrafluoroethanesulfonate ([omim][TFES]) has been measured at approximately 298 and 323 K using the same gravimetric microbalance and the value was compared with the adsorption results. The solubility capacity of R-23 in ionic liquid reaches about 3 mol kg −1 around 2.5 MPa at 298 K, while the adsorption capacity on zeolites becomes around 3 mol kg −1 at around 0.25 MPa (ten times smaller). The adsorption on zeolites took more time than the absorption in the ionic liquid to reach thermodynamic equilibrium. |
| format | Article |
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| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2013-02-01 |
| publisher | SAGE Publishing |
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| spelling | doaj-art-0aa246e1657a4ff6b90f10913a8ad4072025-01-02T23:11:47ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382013-02-013110.1260/0263-6174.31.1.59Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic LiquidMark B. Shiflett0David R. Corbin1A. Yokozeki2 DuPont Central Research and Development, Experimental Station, Wilmington, Delaware 19880, U.S.A. DuPont Central Research and Development, Experimental Station, Wilmington, Delaware 19880, U.S.A. 32 Kingsford Lane, Spencerport, New York 14559, U.S.A.In this study, trifluoromethane (R-23) has been adsorbed on three zeolites, namely 5A, LSX and 13X, and their adsorption isotherms have been measured at approximately 298 and 323 K using a gravimetric microbalance. All cases belong to the adsorption Type II (one of the six IUPAC classifications), and the adsorption (and desorption) processes are reversible. Three different adsorption models [original Langmuir, multi-site Langmuir and BET equations] have been adopted to analyze the data, with a particular interest in calculating the heat of adsorption (–ΔH), which was found to be about 10, 30 and 40 kJ·mol −1 for zeolite 5A, LSX and 13X, respectively. These values are within the range of typical physical adsorptions. Solubility of R-23 in ionic liquid 1-octyl-3-methylimidazolium 1,1,2,2-tetrafluoroethanesulfonate ([omim][TFES]) has been measured at approximately 298 and 323 K using the same gravimetric microbalance and the value was compared with the adsorption results. The solubility capacity of R-23 in ionic liquid reaches about 3 mol kg −1 around 2.5 MPa at 298 K, while the adsorption capacity on zeolites becomes around 3 mol kg −1 at around 0.25 MPa (ten times smaller). The adsorption on zeolites took more time than the absorption in the ionic liquid to reach thermodynamic equilibrium.https://doi.org/10.1260/0263-6174.31.1.59 |
| spellingShingle | Mark B. Shiflett David R. Corbin A. Yokozeki Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid Adsorption Science & Technology |
| title | Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid |
| title_full | Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid |
| title_fullStr | Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid |
| title_full_unstemmed | Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid |
| title_short | Comparison of the Sorption of Trifluoromethane (R-23) on Zeolites and in an Ionic Liquid |
| title_sort | comparison of the sorption of trifluoromethane r 23 on zeolites and in an ionic liquid |
| url | https://doi.org/10.1260/0263-6174.31.1.59 |
| work_keys_str_mv | AT markbshiflett comparisonofthesorptionoftrifluoromethaner23onzeolitesandinanionicliquid AT davidrcorbin comparisonofthesorptionoftrifluoromethaner23onzeolitesandinanionicliquid AT ayokozeki comparisonofthesorptionoftrifluoromethaner23onzeolitesandinanionicliquid |