Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes
As a result of their high tuneability and low volatility, room temperature ionic liquids have been proposed as replacement solvents in a wide range of industrial applications. They are particularly well-suited for use as an entrainer (or solvent) in extractive distillation processes to separate clos...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-11-01
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| Series: | ChemEngineering |
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| Online Access: | https://www.mdpi.com/2305-7084/2/4/54 |
| _version_ | 1818487010298429440 |
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| author | Andrew S. Paluch Pratik Dhakal |
| author_facet | Andrew S. Paluch Pratik Dhakal |
| author_sort | Andrew S. Paluch |
| collection | DOAJ |
| description | As a result of their high tuneability and low volatility, room temperature ionic liquids have been proposed as replacement solvents in a wide range of industrial applications. They are particularly well-suited for use as an entrainer (or solvent) in extractive distillation processes to separate close boiling and azeotropic mixtures. The limiting selectivity is a common, fundamental parameter used to screen and rank entrainer candidates. In the present study, we present a detailed thermodynamic analysis to understand the basis for its use along with the necessary, underlying assumptions. We find that, while for many cases the limiting selectivity can correctly rank ionic liquid entrainer candidates for homogeneous extractive distillation processes, it is not always able to capture the correct phase behavior. We, instead, recommend the use of composition dependent activity coefficients. |
| first_indexed | 2024-12-10T16:31:23Z |
| format | Article |
| id | doaj.art-1fd243db40f74eb9a3fbbd96bd088641 |
| institution | Directory Open Access Journal |
| issn | 2305-7084 |
| language | English |
| last_indexed | 2024-12-10T16:31:23Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ChemEngineering |
| spelling | doaj.art-1fd243db40f74eb9a3fbbd96bd0886412022-12-22T01:41:32ZengMDPI AGChemEngineering2305-70842018-11-01245410.3390/chemengineering2040054chemengineering2040054Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation ProcessesAndrew S. Paluch0Pratik Dhakal1Department of Chemical, Paper and Biomedical Engineering, Miami University, Oxford, OH 45056, USADepartment of Chemical, Paper and Biomedical Engineering, Miami University, Oxford, OH 45056, USAAs a result of their high tuneability and low volatility, room temperature ionic liquids have been proposed as replacement solvents in a wide range of industrial applications. They are particularly well-suited for use as an entrainer (or solvent) in extractive distillation processes to separate close boiling and azeotropic mixtures. The limiting selectivity is a common, fundamental parameter used to screen and rank entrainer candidates. In the present study, we present a detailed thermodynamic analysis to understand the basis for its use along with the necessary, underlying assumptions. We find that, while for many cases the limiting selectivity can correctly rank ionic liquid entrainer candidates for homogeneous extractive distillation processes, it is not always able to capture the correct phase behavior. We, instead, recommend the use of composition dependent activity coefficients.https://www.mdpi.com/2305-7084/2/4/54phase equilibriumextractive distillationentrainerazeotropeionic liquidlimiting activity coefficient |
| spellingShingle | Andrew S. Paluch Pratik Dhakal Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes ChemEngineering phase equilibrium extractive distillation entrainer azeotrope ionic liquid limiting activity coefficient |
| title | Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes |
| title_full | Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes |
| title_fullStr | Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes |
| title_full_unstemmed | Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes |
| title_short | Thermodynamic Assessment of the Suitability of the Limiting Selectivity to Screen Ionic Liquid Entrainers for Homogeneous Extractive Distillation Processes |
| title_sort | thermodynamic assessment of the suitability of the limiting selectivity to screen ionic liquid entrainers for homogeneous extractive distillation processes |
| topic | phase equilibrium extractive distillation entrainer azeotrope ionic liquid limiting activity coefficient |
| url | https://www.mdpi.com/2305-7084/2/4/54 |
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