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Comparative studies on the performance of ionic liquid and conventional solvent drops in extraction of phenol from water
- Source :
- Chemical Engineering Research and Design. 166:259-266
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- This paper describes a systematic study on the hydrodynamic and mass transfer performance of drops in liquid–liquid extra This paper describes a systematic study on the hydrodynamic and mass transfer performance of drops in liquid–liquid extraction of phenol pollutant from aqueous solutions using 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [Hmim][NTf2] ionic liquid. Cumene, as a recommenced conventional solvent, was also used for precise comparison under identical conditions. Due to heavier and lighter solvent drops, relative to the aqueous continuous phase, different setups were employed to perform experiments with falling and rising drops in the columns. Based on different criteria, the generated drops were in circulating state and terminal velocities were comparable with the Grace model. By using the same nozzles, smaller drops were generated with the ionic liquid (2.28–3.01 mm) compared to cumene (2.85–4.32 mm), which was mainly due to lower interfacial tension of the ionic liquid system. Meanwhile, the corresponding mass transfer coefficients were within (7.4–16.2) and (56.3–164.4) μm/s, respectively. The difference can be attributed to the much higher inherent viscosity of the ionic liquid. These findings imply that the ionic liquid, with environmental significance, is promising for the separation of phenol from aqueous solutions in large scale columns. Extraction of phenol pollutant from aqueous solutions using 1-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [Hmim][NTf2] ionic liquid. Cumene, as a recommenced conventional solvent, was also used for precise comparison under identical conditions. Due to heavier and lighter solvent drops, relative to the aqueous continuous phase, different setups were employed to perform experiments with falling and rising drops in the columns. Based on different criteria, the generated drops were in circulating state and terminal velocities were comparable with the Grace model. By using the same nozzles, smaller drops were generated with the ionic liquid (2.28–3.01 mm) compared to cumene (2.85–4.32 mm), which was mainly due to lower interfacial tension of the ionic liquid system. Meanwhile, the corresponding mass transfer coefficients were within (7.4–16.2) and (56.3–164.4) μm/s, respectively. The difference can be attributed to the much higher inherent viscosity of the ionic liquid. These findings imply that the ionic liquid, with environmental significance, is promising for the separation of phenol from aqueous solutions in large scale columns.
- Subjects :
- Cumene
Aqueous solution
Materials science
General Chemical Engineering
Extraction (chemistry)
Analytical chemistry
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
Solvent
Surface tension
chemistry.chemical_compound
020401 chemical engineering
chemistry
Mass transfer
Ionic liquid
Phenol
0204 chemical engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 02638762
- Volume :
- 166
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Research and Design
- Accession number :
- edsair.doi...........f9257f5c1daff6e4e8228bf4de5e8dda