Microfiltration of saline crude oil emulsions: Effects of dispersant and salinity

Kücük, Şeyma; Hejase, Charifa A.; Kolesnyk, Iryna; Chew, Jia Wei; Tarabara, Volodymyr V.

doi:10.1016/j.jhazmat.2020.124747

“…Emulsions are one of the powerful and promising systems for dispersing one liquid in another immiscible liquid, and have been applied in various fields such as cosmetics [1–2] oil recovery, [3,4] and drug delivery [5,6] . Emulsion stability is essential in many applications and is affected by various factors, such as the nature of the emulsifier, aqueous salinity and pH [7–13] . In some special fields, such as acidic oil recovery and sewerage treatments, [14–16] stable emulsions are expected to co‐exist with high concentrations of acids and salts.…”

Section: Introductionmentioning

confidence: 99%

“…[5,6] Emulsion stability is essential in many applications and is affected by various factors, such as the nature of the emulsifier, aqueous salinity and pH. [7][8][9][10][11][12][13] In some special fields, such as acidic oil recovery and sewerage treatments, [14][15][16] stable emulsions are expected to co-exist with high concentrations of acids and salts. However, in such conditions, conventional emulsions stabilized solely by polymers or surfactants are usually unstable.…”

Section: Introductionmentioning

confidence: 99%

Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts

Zhang,

Binks,

Jiang

et al. 2023

Angew Chem Int Ed

3

0

View full text Add to dashboard Cite

Retaining emulsions stable at high acidity and salinity is still a great challenge. Here, we report a novel multi‐headgroup surfactant (C3H7‐NH+(C10COOH)2, di‐UAPAc) which can be reversibly transformed between cationic, anionic and zwitterionic forms upon pH variation. Stable oil‐in‐dispersion (OID) emulsions in strong acid (pH = 2) can be co‐stabilized by low concentrations of di‐UAPAc and silica nanoparticles. High salinity at pH = 2 improves the adsorption of di‐UAPAc on silica particles through hydrogen bonding, resulting in the transformation of OID emulsions into Pickering emulsions. Moreover, emulsification/demulsification and interconversion between OID and Pickering emulsions together with control of the viscosity and droplet size can be triggered by pH. The present work provides a new protocol for designing surfactants for various applications in harsh aqueous media, such as strong acidity and high salinity, involved in oil recovery and sewerage treatments.

show abstract

“…Furthermore, some oils contain a variety of carcinogen substances, which can be concentrated in aquatic organisms, and then threaten human health through the food chain [ 5 , 6 , 7 ]. Therefore, the removal of oil from water and the separation of surfactant-containing oil–water emulsions have been the focus of attention [ 8 , 9 , 10 ]. Traditional oil–water separation methods including gravity, centrifugation, membrane separation, flotation, oxidation, etc., all have certain defects, such as low separation efficiency, high energy consumption, and secondary pollution [ 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Advances in Asymmetric Wettable Janus Materials for Oil–Water Separation

Zhang

¹

,

Wang

²

,

Xing

³

et al. 2022

View full text Add to dashboard Cite

The frequent occurrence of crude oil spills and the indiscriminate discharge of oily wastewater have caused serious environmental pollution. The existing separation methods have some defects and are not suitable for complex oil–water emulsions. Therefore, the efficient separation of complex oil–water emulsions has been of great interest to researchers. Asymmetric wettable Janus materials, which can efficiently separate complex oil–water emulsions, have attracted widespread attention. This comprehensive review systematically summarizes the research progress of asymmetric wettable Janus materials for oil–water separation in the last decade, and introduces, in detail, the preparation methods of them. Specifically, the latest research results of two-dimensional Janus materials, three-dimensional Janus materials, smart responsive Janus materials, and environmentally friendly Janus materials for oil–water separation are elaborated. Finally, ongoing challenges and outlook for the future research of asymmetric wettable Janus materials are presented.

show abstract

Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts

Zhang,

Binks,

Jiang

et al. 2023

Angewandte Chemie

0

View full text Add to dashboard Cite

Retaining emulsions stable at high acidity and salinity is still a great challenge. Here, we report a novel multi‐headgroup surfactant (C3H7‐NH+(C10COOH)2, di‐UAPAc) which can be reversibly transformed between cationic, anionic and zwitterionic forms upon pH variation. Stable oil‐in‐dispersion (OID) emulsions in strong acid (pH = 2) can be co‐stabilized by low concentrations of di‐UAPAc and silica nanoparticles. High salinity at pH = 2 improves the adsorption of di‐UAPAc on silica particles through hydrogen bonding, resulting in the transformation of OID emulsions into Pickering emulsions. Moreover, emulsification/demulsification and interconversion between OID and Pickering emulsions together with control of the viscosity and droplet size can be triggered by pH. The present work provides a new protocol for designing surfactants for various applications in harsh aqueous media, such as strong acidity and high salinity, involved in oil recovery and sewerage treatments.

show abstract

Microfiltration of saline crude oil emulsions: Effects of dispersant and salinity

Cited by 13 publications

References 55 publications

Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts

Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts

Advances in Asymmetric Wettable Janus Materials for Oil–Water Separation

Smart Emulsions Stabilized by a Multi‐headgroup Surfactant Tolerant to High Concentrations of Acids and Salts

Contact Info

Product

Resources

About