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Schieppati D, Mohan M, Blais B, Fattahi K, Patience GS, Simmons BA, Singh S, Boffito DC. Characterization of the acoustic cavitation in ionic liquids in a horn-type ultrasound reactor. ULTRASONICS SONOCHEMISTRY 2024; 102:106721. [PMID: 38103370 PMCID: PMC10765111 DOI: 10.1016/j.ultsonch.2023.106721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
Most ultrasound-based processes root in empirical approaches. Because nearly all advances have been conducted in aqueous systems, there exists a paucity of information on sonoprocessing in other solvents, particularly ionic liquids (ILs). In this work, we modelled an ultrasonic horn-type sonoreactor and investigated the effects of ultrasound power, sonotrode immersion depth, and solvent's thermodynamic properties on acoustic cavitation in nine imidazolium-based and three pyrrolidinium-based ILs. The model accounts for bubbles, acoustic impedance mismatch at interfaces, and treats the ILs as incompressible, Newtonian, and saturated with argon. Following a statistical analysis of the simulation results, we determined that viscosity and ultrasound input power are the most significant variables affecting the intensity of the acoustic pressure field (P), the volume of cavitation zones (V), and the magnitude of the maximum acoustic streaming surface velocity (u). V and u increase with the increase of ultrasound input power and the decrease in viscosity, whereas the magnitude of negative P decreases as ultrasound power and viscosity increase. Probe immersion depth positively correlates with V, but its impact on P and u is insignificant. 1-alkyl-3-methylimidazolium-based ILs yielded the largest V and the fastest acoustic jets - 0.77 cm3 and 24.4 m s-1 for 1-ethyl-3-methylimidazolium chloride at 60 W. 1-methyl-3-(3-sulfopropyl)-imidazolium-based ILs generated the smallest V and lowest u - 0.17 cm3 and 1.7 m s-1 for 1-methyl-3-(3-sulfopropyl)-imidazolium p-toluene sulfonate at 20 W. Sonochemiluminescence experiments validated the model.
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Affiliation(s)
- Dalma Schieppati
- Department of Chemical Engineering, École Polytechnique Montréal, C.P. 6079, Succ. CV, Montréal H3C 3A7, Québec, Canada
| | - Mood Mohan
- Deconstruction Division, Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA 94608, USA; Bioscience Division and Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Bruno Blais
- Department of Chemical Engineering, École Polytechnique Montréal, C.P. 6079, Succ. CV, Montréal H3C 3A7, Québec, Canada
| | - Kobra Fattahi
- Department of Chemical Engineering, École Polytechnique Montréal, C.P. 6079, Succ. CV, Montréal H3C 3A7, Québec, Canada
| | - Gregory S Patience
- Department of Chemical Engineering, École Polytechnique Montréal, C.P. 6079, Succ. CV, Montréal H3C 3A7, Québec, Canada
| | - Blake A Simmons
- Deconstruction Division, Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA 94608, USA; Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Seema Singh
- Deconstruction Division, Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA 94608, USA
| | - Daria C Boffito
- Department of Chemical Engineering, École Polytechnique Montréal, C.P. 6079, Succ. CV, Montréal H3C 3A7, Québec, Canada.
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Koval I. Determination of the Rate Constant of Microorganisms Destruction after Ultrasound Water Treatment and Different Gases Action. CHEMISTRY & CHEMICAL TECHNOLOGY 2022. [DOI: 10.23939/chcht16.04.652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The change of microorganisms number (rod-like spore-containing Bacillus cereus bacteria type) for the range of 102 ÷ 106 CFU in 1 cm3 from the duration of simultaneous action of ultrasound (US) cavitation and the nature of different gas (carbon dioxide, oxygen, argon) is presented. The graphical dependences of the effective rate constant values of microorganisms destruction (kd) on its initial number per unit volume of water at different modes of its treatment are shown. The destruction degrees of bacterial cells in the process of water purification are calculated. It was investigated that the value of kd does not depend on the initial number of cells in water, but depends on the nature of the bubbled gas through the reaction aqueous medium: kd(Ar/US) > kd(O2/US) > kd(CO2/US).
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Koval I. Synergistic Effect of Ultrasound Cavitation and Gas in the Water Disinfection. CHEMISTRY & CHEMICAL TECHNOLOGY 2021. [DOI: 10.23939/chcht15.04.575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The paper considers water purification processes from Bacillus bacteria type under the conditions of gases bubbling only (argon, helium, oxygen, and carbon dioxide), cavitation and combined action of gas and cavitation. The synergistic effect was found under conditions of simultaneous action of gas and cavitation (kd(gas/US ) >kd(gas) + kd(US) almost double) and it was shown that kd(gas/US) >kd(gas) by almost an order of magnitude. Relative series of effective destruction of microbial cells was established: Ar/US > О2/US >Не/US > СО2/US. Destruction degree of the cells reaches 70 %at the short-term Ar/US exposure (~8 min), which is 7 times more active than cavitation action and 13.5 times more than bubbling of Aralone.
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Naidji B, Hallez L, Et Taouil A, Rebetez M, Hihn JY. Effect of cavitation intensity control on self-assembling of alkanethiols on gold in room temperature ionic liquids. ULTRASONICS SONOCHEMISTRY 2021; 75:105610. [PMID: 34087756 PMCID: PMC8184662 DOI: 10.1016/j.ultsonch.2021.105610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/14/2021] [Accepted: 05/25/2021] [Indexed: 05/14/2023]
Abstract
This study investigates the effect of cavitation intensity on self-assembling of alkanethiol molecules on gold in room temperature ionic liquids (RTILs) under low frequency ultrasound irradiation (20 kHz). The use of RTILs, with low vapor pressure, enabled cavitation activity to be controlled up to quenching through pressure decrease within an argon-saturated atmosphere. This control possibility was used to acquire deeper insights into the role of cavitation on self-assembling processes. It was shown by electrochemical, contact angles and Polarization Modulation - Infrared Reflection Absorption Spectroscopy (PM-IRRAS) measurements that cavitation activates orientation and organization of self-assembled monolayers (SAM). X-ray Photoelectron Spectroscopy (XPS) revealed that, even if chemical adsorption of molecules is highly activated under ultrasound irradiation, it is not dependent on acoustic cavitation intensity.
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Affiliation(s)
- B Naidji
- Institut UTINAM, UMR 6213 CNRS, Univ. Bourgogne-Franche-Comte, 30 Avenue de Observatoire, 25009 Cedex Besançon, France
| | - L Hallez
- Institut UTINAM, UMR 6213 CNRS, Univ. Bourgogne-Franche-Comte, 30 Avenue de Observatoire, 25009 Cedex Besançon, France
| | - A Et Taouil
- Institut UTINAM, UMR 6213 CNRS, Univ. Bourgogne-Franche-Comte, 30 Avenue de Observatoire, 25009 Cedex Besançon, France
| | - M Rebetez
- Institut UTINAM, UMR 6213 CNRS, Univ. Bourgogne-Franche-Comte, 30 Avenue de Observatoire, 25009 Cedex Besançon, France
| | - J-Y Hihn
- Institut UTINAM, UMR 6213 CNRS, Univ. Bourgogne-Franche-Comte, 30 Avenue de Observatoire, 25009 Cedex Besançon, France.
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Hujjatul Islam M, Naidji B, Hallez L, Et Taouil A, Hihn JY, Burheim OS, Pollet BG. The use of non-cavitating coupling fluids for intensifying sonoelectrochemical processes. ULTRASONICS SONOCHEMISTRY 2020; 66:105087. [PMID: 32234676 DOI: 10.1016/j.ultsonch.2020.105087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/16/2020] [Accepted: 03/22/2020] [Indexed: 06/11/2023]
Abstract
For the first time, we have investigated the beneficial effects of non-cavitating coupling fluids and their moderate overpressures in enhancing mass-transfer and acoustic energy transfer in a double cell micro-sonoreactor. Silicon and engine oils of different viscosities were used as non-cavitating coupling fluids. A formulated monoethylene glycol (FMG), which is a regular cooling fluid, was also used as reference. It was found that silicon oil yielded a maximum acoustic energy transfer (3.05 W/cm2) from the double jacketed cell to the inner cell volume, at 1 bar of coupling fluid overpressure which was 2.5 times higher than the regular FMG cooling fluid. It was also found that the low viscosity engine oil had a higher acoustic energy value than that of the high viscosity engine oil. In addition, linear sweep voltammograms (LSV) were recorded for the quasi-reversible Fe2+/Fe3+ redox couple (equimolar, 5 × 10-3 M) on a Pt electrode in order to determine the mass-transport limited current density (jlim) and the dimensionless Sherwood number (Sh). From the LSV data, a statistical analysis was performed in order to determine the contribution of acoustic cavitation in the current density variation |Δj|average. It was found that silicon oil at 1 bar exhibited a maximum current density variation, |Δj|average of ~2 mA/cm2 whereas in the absence of overpressure, the high viscosity engine oil led to a maximum |Δj|average which decreased gradually with increasing coupling fluid overpressure. High viscosity engine oil gave a maximum Sh number even without any overpressure which decreased gradually with increasing overpressure. The Sh number for silicon oil increased with increasing overpressure and reached a maximum at 1 bar of overpressure. For any sonoelectrochemical processes, if the aim is to achieve high mass-transfer and acoustic energy transfer, then silicon oil at 1 bar of overpressure is a suitable candidate to be used as a coupling fluid.
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Affiliation(s)
- Md Hujjatul Islam
- Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - Bouzid Naidji
- Institut UTINAM UMR 6213 CNRS, Université de Bourgogne Franche Comte, 16 route de Gray F25030, Besançon Cedex, France
| | - Loic Hallez
- Institut UTINAM UMR 6213 CNRS, Université de Bourgogne Franche Comte, 16 route de Gray F25030, Besançon Cedex, France
| | - Abdeslam Et Taouil
- Institut UTINAM UMR 6213 CNRS, Université de Bourgogne Franche Comte, 16 route de Gray F25030, Besançon Cedex, France
| | - Jean-Yves Hihn
- Institut UTINAM UMR 6213 CNRS, Université de Bourgogne Franche Comte, 16 route de Gray F25030, Besançon Cedex, France.
| | - Odne S Burheim
- Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - Bruno G Pollet
- Hydrogen Energy and Sonochemistry Research Group, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway.
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