Experimental study on the effect of spatial distribution and action order of electric field and magnetic field on oil-water separation

Guo, Kai; Lv, Yuling; He, Limin; Luo, Xiaoming; Zhao, Jie

doi:10.1016/j.cep.2019.107658

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…The magnetic field can also change the physical and chemical properties of various solutes (including the dissolution, crystallization, precipitation and aggregation behavior of natural compounds or biological macromolecules), and further strengthen the phase separation, extraction, ion exchange, adsorption and flocculation process, etc. It has been found that a magnetic field with a suitable intensity can improve the separation performance of specific materials by increasing mass transfer speeds [18], and simpler objects and more easily popularized studies are usually found in the separation of twophase emulsions [19,20] or ternary solvent systems [21]. According to related results, a magnetic field has a positive effect on the liquid-liquid extraction process, and liquid-liquid equilibrium data show that the distribution coefficients and resolution factors increase with the intensity of a magnetic field, which are measured under the magnetic field and can fit the non-random two-liquid (NRTL) model well [21].…”

Section: Roles Of Magnetic Fields In Extraction and Separationmentioning

confidence: 99%

Magnetic Technologies and Green Solvents in Extraction and Separation of Bioactive Molecules Together with Biochemical Objects: Current Opportunities and Challenges

et al. 2022

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Currently, magnetic technology and green solvents are widely used in chemical engineering, environmental engineering and other fields as they are environmentally friendly, easy to operate and highly efficient. Moreover, a magnetic field has positive effect on many physicochemical processes. However, related new methods, materials, strategies and applications in separation science still need to be developed. In this review, a series of meaningful explorations of magnetic technologies for the separation of natural products and biologic objects, including magnetic ionic liquids and other magnetic solvents and fluids, magnetic nanoparticles and magnetic fields, and the development of magnetic separators were reviewed. Furthermore, the difficulties in the application and development of magnetic separation technology were discussed on the basis of comparison and data analysis, especially for the selection of magnetic materials and magnetic field sources. Finally, the progress in the development of magnetic separators was also elaborated for researchers, mainly including that of the new high-efficiency magnetic separator through multi-technology integration and the optimization of traditional magnetic separators, which help current techniques break through their bottleneck as a powerful driving force.

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Section: Roles Of Magnetic Fields In Extraction and Separationmentioning

confidence: 99%

Magnetic Technologies and Green Solvents in Extraction and Separation of Bioactive Molecules Together with Biochemical Objects: Current Opportunities and Challenges

et al. 2022

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“…Because a magnetic field changes the hydrogen bonding in water molecules, the polarity of the water is enhanced. The viscosity of the water is reduced [50,51], so the diffusion process of solute is accelerated under the effect of the magnetic field, the range of motion of solute molecules is more extensive and more accessible, there are more opportunities for solute molecules to collide, the practical collision is increased, and the nucleation process is promoted. On the other hand, the presence of a magnetic field decreases the surface tension of the solution, and the free energy of the liquid-solid transition during crystallization decreases, which reduces the critical nucleation radius [52,53].…”

Section: Effect Of Magnetic Field On Induction Periodmentioning

confidence: 99%

Effects of Solubilizer and Magnetic Field during Crystallization Induction of Ammonium Bicarbonate in New Ammonia-Based Carbon Capture Process

et al. 2022

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As a chemical absorption method, the new ammonia carbon capture technology can capture CO2. Adding ethanol to ammonia can reduce the escape of ammonia to a certain extent and increase the absorption rate of CO2. The dissolution and crystallization of ethanol can realize the crystallization of ammonium bicarbonate and generate solid products. The induction of the crystallization process is influenced by many parameters, such as solution temperature, supersaturation, and solvating precipitant content. The basic nucleation theory is related to the critical size of nucleation. Accurate measurement of the induction period and investigating relevant factors can help to assess the nucleation kinetics. The effects of solubilizer content, temperature, and magnetic field on the induction period of the crystallization process of ammonium bicarbonate in the ethanol–H2O binary solvent mixture and determining the growth mechanism of the crystal surface by solid–liquid surface tension and surface entropy factor are investigated. The results indicate that under the same conditions of mixed solution temperature, the crystallization induction period becomes significantly longer, the solid–liquid surface tension increases, and the nucleation barrier becomes more significant and less likely to form nuclei as the content of solvating precipitants in the components increases. At the same solubilizer content, there is an inverse relationship between the solution temperature and the induction period, and the solid–liquid surface tension decreases. The magnetic field can significantly reduce the induction period of the solvate crystallization process. This gap tends to decrease with an increase in supersaturation; the shortening reduces from 96.9% to 84.0%. This decreasing trend becomes more and more evident with the rise of solvent content in the solution. The variation of surface entropy factor under the present experimental conditions ranges from 0.752 to 1.499. The growth mode of ammonium bicarbonate in the ethanol–H2O binary solvent mixture can be judged by the surface entropy factor as continuous growth.

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Double layer characteristics of droplets dispersed with Na2CO3 in EMSF that is applied to dehydration of Shale oil

Guo,

Du,

Lü

et al. 2023

Chemical Engineering and Processing - Process Intensification

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Experimental study on the effect of spatial distribution and action order of electric field and magnetic field on oil-water separation

Cited by 10 publications

References 32 publications

Magnetic Technologies and Green Solvents in Extraction and Separation of Bioactive Molecules Together with Biochemical Objects: Current Opportunities and Challenges

Magnetic Technologies and Green Solvents in Extraction and Separation of Bioactive Molecules Together with Biochemical Objects: Current Opportunities and Challenges

Effects of Solubilizer and Magnetic Field during Crystallization Induction of Ammonium Bicarbonate in New Ammonia-Based Carbon Capture Process

Double layer characteristics of droplets dispersed with Na2CO3 in EMSF that is applied to dehydration of Shale oil

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