Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion
In the present work, the binding capacity of a 1-methyl-3-hexylimidazolium p-toluenesulfonate ionic liquid to Aragon light oil within a 70/30 oil/water emulsion was studied by cyclic voltammetry. The imidazole-based ionic liquid was synthesized by anion interchange reaction. Its chemical structure w...
Autores principales: | , , , |
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Formato: | Artículo |
Lenguaje: | inglés |
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2021
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Acceso en línea: | http://eprints.uanl.mx/24860/1/24860.pdf |
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author | Villalobos Neri, E.E. Páramo García, U. Mayen Mondragon, R. Gallardo Rivas, N.V. |
author_facet | Villalobos Neri, E.E. Páramo García, U. Mayen Mondragon, R. Gallardo Rivas, N.V. |
author_sort | Villalobos Neri, E.E. |
collection | Repositorio Institucional |
description | In the present work, the binding capacity of a 1-methyl-3-hexylimidazolium p-toluenesulfonate ionic liquid to Aragon light oil within a 70/30 oil/water emulsion was studied by cyclic voltammetry. The imidazole-based ionic liquid was synthesized by anion interchange reaction. Its chemical structure was confirmed by Fourier-Transform Infrared Spectroscopy and Nuclear Magnetic Resonance. Its Critical Micelle Concentration (CMC) in water was determined by Conductimetry, Ultraviolet-Visible Spectroscopy and Cyclic Voltammetry. The ionic-liquid-to-oil binding-constant and binding-free-energy were determined from the dependence of the voltammogram anodic-peak-current with the ionic liquid concentration in the emulsion. The diffusion coefficient of the free and bound forms of the oil within the emulsion were determined from the Randles-Sevcik equation. The measurements led to a CMC value of approximately 152 mg/L and a binding constant of 0.98x104 M-1, corresponding to a binding free energy of -22.78 KJ/mol. The negative value of the latter confirmed the ionic liquid spontaneously binds to the oil phase. The oil-droplets diffusion coefficient showed a 2.5-fold increase (up to 4.631x10-7 cm2/s) due to incorporation of the ionic liquid molecules. The information gathered can be helpful to design more efficient remediation processes of oil-contaminated water, as well as to improve the design of ionic liquid molecules, and to study their interaction with different oil components. |
format | Article |
id | eprints-24860 |
institution | UANL |
language | English |
publishDate | 2021 |
record_format | eprints |
spelling | eprints-248602023-05-07T04:30:18Z http://eprints.uanl.mx/24860/ Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion Villalobos Neri, E.E. Páramo García, U. Mayen Mondragon, R. Gallardo Rivas, N.V. QD Química In the present work, the binding capacity of a 1-methyl-3-hexylimidazolium p-toluenesulfonate ionic liquid to Aragon light oil within a 70/30 oil/water emulsion was studied by cyclic voltammetry. The imidazole-based ionic liquid was synthesized by anion interchange reaction. Its chemical structure was confirmed by Fourier-Transform Infrared Spectroscopy and Nuclear Magnetic Resonance. Its Critical Micelle Concentration (CMC) in water was determined by Conductimetry, Ultraviolet-Visible Spectroscopy and Cyclic Voltammetry. The ionic-liquid-to-oil binding-constant and binding-free-energy were determined from the dependence of the voltammogram anodic-peak-current with the ionic liquid concentration in the emulsion. The diffusion coefficient of the free and bound forms of the oil within the emulsion were determined from the Randles-Sevcik equation. The measurements led to a CMC value of approximately 152 mg/L and a binding constant of 0.98x104 M-1, corresponding to a binding free energy of -22.78 KJ/mol. The negative value of the latter confirmed the ionic liquid spontaneously binds to the oil phase. The oil-droplets diffusion coefficient showed a 2.5-fold increase (up to 4.631x10-7 cm2/s) due to incorporation of the ionic liquid molecules. The information gathered can be helpful to design more efficient remediation processes of oil-contaminated water, as well as to improve the design of ionic liquid molecules, and to study their interaction with different oil components. 2021 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/24860/1/24860.pdf http://eprints.uanl.mx/24860/1.haspreviewThumbnailVersion/24860.pdf Villalobos Neri, E.E. y Páramo García, U. y Mayen Mondragon, R. y Gallardo Rivas, N.V. (2021) Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion. International Journal of Electrochemical Science (16). pp. 1-14. ISSN 14523981 |
spellingShingle | QD Química Villalobos Neri, E.E. Páramo García, U. Mayen Mondragon, R. Gallardo Rivas, N.V. Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
title | Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
title_full | Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
title_fullStr | Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
title_full_unstemmed | Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
title_short | Electrochemical Study of Interaction between Imidazole-Based-Ionic-Liquid and Light Petroleum in Oil/Water Emulsion |
title_sort | electrochemical study of interaction between imidazole based ionic liquid and light petroleum in oil water emulsion |
topic | QD Química |
url | http://eprints.uanl.mx/24860/1/24860.pdf |
work_keys_str_mv | AT villalobosneriee electrochemicalstudyofinteractionbetweenimidazolebasedionicliquidandlightpetroleuminoilwateremulsion AT paramogarciau electrochemicalstudyofinteractionbetweenimidazolebasedionicliquidandlightpetroleuminoilwateremulsion AT mayenmondragonr electrochemicalstudyofinteractionbetweenimidazolebasedionicliquidandlightpetroleuminoilwateremulsion AT gallardorivasnv electrochemicalstudyofinteractionbetweenimidazolebasedionicliquidandlightpetroleuminoilwateremulsion |