A comprehensive review on demulsification using functionalized magnetic nanoparticles

Hamedi, Hamideh; Rezaei, Nima; Zendehboudi, Sohrab

doi:10.1016/j.jclepro.2022.134868

Cited by 24 publications

(11 citation statements)

References 98 publications

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“…A further study on the interplay between the asphaltene dilution effect and the influence of the aromaticity of the oil phase was performed using chemical demulsifiers for emulsion destabilization, an economically viable and widely used method. [ 48 ] The stability of emulsions is primarily determined by the solubility state of asphaltenes in the crude oil, which controls the formation of a thin film at the interface of the suspended droplets in the continuous phase. [ 6 ] These films increase the interfacial viscosity, and as a result, the stability of the emulsion can be linked to the mobility of these interfacial films.…”

Section: Resultsmentioning

confidence: 99%

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Daza‐Barranco,

Duncke,

de Souza Mendes

et al. 2023

Can J Chem Eng

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This study investigated the effect of solvent aromaticity on asphaltene stability and interfacial behaviour using typical diluted heavy oils, which better represent the chemical diversity of petroleum components than previous studies that used simple solvent mixtures with low asphaltene concentrations. A Brazilian crude with high viscosity and asphaltene content was diluted with two kerosenes, one containing only saturated compounds (KeS), and the other a saturates/aromatics mixture (KeSA) to maintain total aromaticity in the oil mixture upon dilution. Viscosity, asphaltene stability, interfacial tension, and elasticity of the oil mixtures were measured, and correlated with emulsion stability, regarding the differences in solvent aromaticity and aromatics/saturates ratio. The results showed that the different kerosene compositions affected bulk viscosity and asphaltene flocculation, but had a lesser effect on oil/brine interfacial tension due to the high asphaltene content in the diluted oil. The elastic modulus decreased at higher dilutions with KeS, while it remained consistent for KeSA mixtures, which supported the differences obtained in emulsion stability, at solvent concentrations within the optimal aromaticity ratio reported for simple solvent mixtures. Interfacial segregation of the aromatics in KeSA was also observed, which has not been reported in previous studies using complex solvents. These findings suggest that the trends reported with model oils, such as heptol with added asphaltenes, can also be applied to more realistic complex oil mixtures with higher asphaltene concentrations. Nevertheless, it was suggested that maintaining the aromatic content may not be enough to prevent asphaltene flocculation upon dilution, due to the concurrent increase in saturates.

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Section: Resultsmentioning

confidence: 99%

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Daza‐Barranco,

Duncke,

de Souza Mendes

et al. 2023

Can J Chem Eng

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“…We compare the demulsification performances of CTAB as a cationic surfactant and also sodium dodecyl sulfate (SDS) as an anionic surfactant to further understand the contribution of electrostatic interactions in demulsification by MNPs, which has not been discussed in the literature to the best of our knowledge. 28 In this study, we aim to demulsify O/W using functionalized MNPs for oil droplets of nanometer size that are finer (and more stable) than those studied in the literature. Additionally, the effect of MNP size on demulsification is controversial in the literature, 28 which is studied in this work by considering two different sizes of Fe 3 O 4 nanoparticles and different mass ratios of surfactant-to-MNPs.…”

Section: ■ Introductionmentioning

confidence: 99%

“…28 In this study, we aim to demulsify O/W using functionalized MNPs for oil droplets of nanometer size that are finer (and more stable) than those studied in the literature. Additionally, the effect of MNP size on demulsification is controversial in the literature, 28 which is studied in this work by considering two different sizes of Fe 3 O 4 nanoparticles and different mass ratios of surfactant-to-MNPs. The optimum MNP features, such as the size, coating chemistry, and coating ratio, are achievable by comparing the results of oil adsorption capacities for various scenarios via a gas chromatograph equipped with a flame ionization detector (FID).…”

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In our previous comprehensive review on the applications of MNPs in oil–water separation, a wide range of MNPs with different coatings were reviewed . Although O/W contaminations are important in various industries, some of these synthesized MNPs in the literature are only dispersible in organic solvents and not in water, which can result in inefficient demulsification by the MNPs and by applying an external magnetic field. , Therefore, we use surfactants as amphiphilic coatings to improve the dispersivity in the continuous phase and attraction to the dispersed phase. We compare the demulsification performances of CTAB as a cationic surfactant and also sodium dodecyl sulfate (SDS) as an anionic surfactant to further understand the contribution of electrostatic interactions in demulsification by MNPs, which has not been discussed in the literature to the best of our knowledge .…”

Section: Introductionmentioning

confidence: 99%

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Application of Functionalized Fe₃O₄ Magnetic Nanoparticles Using CTAB and SDS for Oil Separation from Oil-in-Water Nanoemulsions

et al. 2023

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Using magnetic nanoparticles (MNPs) for emulsified oil separation from wastewater is becoming increasingly widespread. This study aims to synthesize MNPs using amphiphilic coatings to stabilize the MNPs and prevent their agglomeration for efficiently breaking oil-in-water nanoemulsions. We coat two different sizes of Fe 3 O 4 nanoparticles (15−20 and 50−100 nm) using cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) with surfactant-to-MNP mass ratios of 0.4 and 0.8. We study the effect of various variables on the demulsification performance, including the MNP size and concentration, coating materials, and MNP loading. Based on the oil−water separation analysis, the smaller size MNPs (MNP-S) show a better demulsification performance than the larger ones (MNP-L ) for a 1000 ppm dodecane-in-water emulsion containing nanosized oil droplets (250−300 nm). For smaller MNPs (MNP-S) and at low dosage level of 0.5 g/L, functionalizing with surfactant-to-MNP mass ratio of 0.4, the functionalization increases the separation efficiency (SE) from 57.5% for bare MNP-S to 86.1% and 99.8 for the SDS and CTAB coatings, respectively. The highest SE for MNP-S@CTAB and the zeta potential measurements imply that electrostatic attraction between negatively charged oil droplets (−55.9 ± 2.44 mV) and positively charged MNP-S@CTAB (+35.8 ± 0.34 mV) is the major contributor to a high SE. Furthermore, the reusability tests for MNP-S@CTAB reveal that after 10 cycles, the amount of oil adsorption capacity decreases slightly, from 20 to 19 mg/g, indicating an excellent stability of synthesized nanoparticles. In conclusion, functionalized MNPs with tailored functional groups feature a high oil SE that could be effectively used for oil separation from emulsified oily wastewater streams.

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Smart emulsion system driven by light‐triggered ionic liquid molecules and its application in eco‐friendly water‐saving dyeing

Gao,

Liang,

Jing

et al. 2024

Smart Molecules

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The smart emulsification and demulsification system with the light response is a useful tool in various industries, including green chemistry, catalytic reaction, pharmaceuticals, and environmental remediation. Herein, an ionic liquid crystal compound with a light triggered switch based on the azobenzene group [(4‐{3‐methyl‐1‐[3‐(8‐octyloxyoctyl)oxy‐4‐oxobutanoyl]imidazo‐lium‐1‐yl}octyl)oxy] ‐N‐(4‐methylphenyl)benzene‐1,2‐diazene bromide (MOIAzo), was designed and synthesized, which could cause reversible transition between emulsification and demulsification through the light trigger. The ionic liquid has an efficient photoinduced liquefaction process, which dramatically lowers the melting point of ionic liquids from 79 to 9.2 oC. This significantly broadens the liquid state temperature of the ionic liquid crystal. The ionic liquid crystal MOIAzo exhibits both photoinduced and thermally induced nematic liquid crystal properties. The smart emulsion system was effectively employed in an eco‐friendly water‐saving dyeing process of cationic dyes for cationic dyeable polyester (CDP) fabrics, which used only half the amount of water compared with the conventional water bath dyeing method. After dyeing, the oil and water phases can be efficiently separated through the light irradiation, and the oil phase can be reused for the subsequent dyeing process. This novel smart emulsion dyeing method greatly reduces the water consumption and wastewater discharge. MOIAzo as a light‐triggered ionic liquid molecule opens up new dimensions in green chemistry.

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A comprehensive review on demulsification using functionalized magnetic nanoparticles

Cited by 24 publications

References 98 publications

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Application of Functionalized Fe₃O₄ Magnetic Nanoparticles Using CTAB and SDS for Oil Separation from Oil-in-Water Nanoemulsions

Smart emulsion system driven by light‐triggered ionic liquid molecules and its application in eco‐friendly water‐saving dyeing

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A comprehensive review on demulsification using functionalized magnetic nanoparticles

Cited by 24 publications

References 98 publications

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Effect of kerosene aromaticity as a solvent on bulk and interfacial properties of Brazilian heavy crude oil with high asphaltene content

Application of Functionalized Fe3O4 Magnetic Nanoparticles Using CTAB and SDS for Oil Separation from Oil-in-Water Nanoemulsions

Smart emulsion system driven by light‐triggered ionic liquid molecules and its application in eco‐friendly water‐saving dyeing

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Application of Functionalized Fe₃O₄ Magnetic Nanoparticles Using CTAB and SDS for Oil Separation from Oil-in-Water Nanoemulsions