Article
Chemistry, Physical
Ravneet Kaur Sandhu, Amandeep Kaur, Prabhjot Kaur, Jaspreet Kaur Rajput, Poonam Khullar, Mandeep Singh Bakshi
Summary: The study investigated the solubilization capacity of surfactant stabilized Au nanoparticles using W/O and O/W microemulsions. The results showed that the solubilization capacity was more dependent on the amount of Tween 80 in the microemulsion preparation than the nature of the surfactant. Higher amounts of Tween 80 provided greater solubilization capacity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Miguel Mejia, Jose E. Parra, Lucas Mejia, Gary A. Pope, Matthew T. Balhoff
Summary: The study found that using surfactants in fractured oil wet limestone cores can form viscous microemulsions, which are beneficial for increasing oil recovery, especially compared to water flooding.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Food Science & Technology
Wenjiao Liu, Ning Pan, Ying Han, Dejie Li, Jinling Chai
Summary: A novel surfactant-free microemulsion (SFME) was constructed and investigated for its solubilization performance of curcumin. The experiments showed that embedding curcumin in the SFME significantly improved its storage stability, light stability, thermal stability and antioxidant activity, which is of great significance for the practical application of biomolecules.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Bernard P. Binks, Badri Vishal
Summary: The area of oil foams has received little academic attention until the last decade, but interest has grown recently, fueled in part by advances in the general area of colloidal particles at fluid interfaces. There is increasing research on the use of solid particles as foaming agents for oil foams, particularly in relation to the food industry.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Wenshuai Qi, Quanhua Deng, Na Du, Wanguo Hou
Summary: This study investigates the phase behavior of surfactant-free microemulsions (SFMEs). It reveals the formation of microemulsions without traditional surfactants in the ternary mixture of n-butanol, ethanol, and water, and identifies three types of microstructures, including oil-in-water, bicontinuous, and water-in-oil structures.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Yanne Katiussy Pereira Gurgel Aum, Pedro Tupa Pandava Aum, Daniel Nobre Nunes da Silva, Luyara de Almeida Cavalcante, Eduardo Lins de Barros Neto, Tereza Neuma de Castro Dantas
Summary: This study characterizes an oil-in-water (O/W) microemulsion system with the potential for removing paraffinic deposits. The system can effectively solubilize paraffin without altering phase equilibrium and rheology behavior, as demonstrated through phase equilibrium, droplet size, and rheology characterization.
Article
Chemistry, Physical
Chintya Gunarto, Hao-Yen Hsu, Alchris Woo Go, Shella Permatasari Santoso, Chi Thanh Truong, Yi-Hsu Ju, Artik Elisa Angkawijaya
Summary: In this study, cellulose nanocrystal (CNC) was added to modify the stability and characteristics of microemulsions (MEs). The results demonstrate that the supplementation of CNC can reduce the usage of surfactant, resulting in optimal hydrodynamic diameter and stability of MEs.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Pedro Tupa Pandava Aum, Yanne K. Pereira Gurgel Aum, Edson de Andrade Araujo, Luyara de Almeida Cavalcante, Daniel Nobre Nunes da Silva, Claudio Regis dos Santos Lucas, Tereza Neuma de Castro Dantas
Summary: This study investigates the stability and interaction of oil-in-water microemulsions prepared with nonionic surfactants under acid conditions with carbonate formations. The presence of acid was found to increase the stability of the microemulsion systems, while also altering the spreading pattern of the acid systems on the carbonate rock surface.
Article
Energy & Fuels
Tereza Neuma de Castro Dantas, Flavia Freitas Viana, Tamyris Thaise Costa de Souza, Afonso Avelino Dantas Neto, Pedro Tupa Pandava Aum
Summary: Microemulsion flooding is a chemical EOR method that enhances oil recovery by reducing surface tension and changing rock wettability. Experimental results demonstrate the potential of microemulsion prepared with alkali and polymer in the EOR process, achieving up to 97% of the oil recovery factor.
Article
Agriculture, Multidisciplinary
Xiaoqiu Song, Jinyu Wang, Shuaitao Li, Yifei Wang
Summary: Among the four different surfactants tested, Tween 80 was found to solubilize the maximum amount of oil and induce the formation of a U-type microemulsion system. The presence of short-chain alcohols decreased oil solubilization, while straight-chain esters as cosolvent showed a higher expansion effect in the U-type areas compared to systems containing essential oils. Structural transitions from W/O to bicontinuous and then to O/W were observed upon water dilution of the microemulsions.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Article
Energy & Fuels
Jaeyub Chung, Jeremy Holtsclaw, Timothy C. Henderson, Thomas A. Everett, Nathan C. Schultheiss, Bryan W. Boudouris, Elias Franses
Summary: This study investigates the impact of chemical enhanced oil recovery on the oil recovery of mature oil fields, identifying ultralow interfacial tensions as crucial for increasing the capillary number and mobilizing trapped oil droplets. Among the five types of equilibrium interfacial tensions studied, it was found that formulations with the lowest type IV equilibrium interfacial tension exhibited the highest oil recovery ratio in core flood tests. This highlights the importance of identifying surfactant formulations with low or ultralow interfacial tensions, particularly of type IV or V, for effective screening and predicting oil recovery performance in core flood tests and field applications.
Article
Agricultural Engineering
Juanhua Kong, Lixia Li, Qiang Zeng, Zhenping Cai, Yingying Wang, Hongyan He, Sijie Liu, Xuehui Li
Summary: A surfactant-free microemulsion reactor was designed to enhance the oxidative depolymerization of lignin, resulting in a substantial improvement in phenolic monomer yield. This intensification was rationalized by the solubilization effect of the microemulsion system and directional aggregation of lignin at the microemulsion interface.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Nilanjan Pal, Yara Alzahid, Abdulkareem M. AlSofi, Muhammad Ali, Xuan Zhang, Hussein Hoteit
Summary: This article discusses the use of microemulsion-assisted conformance improvement technology (ME-CIT) to decrease the water-to-oil ratio during production operations. Experimental validation is carried out to identify the phase behavior of surfactant-based microemulsions. The results show the presence of different Winsor phases at varying salinity levels and demonstrate the favorable flow attributes of microemulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Iyman Abrar, Ashok N. Bhaskarwar
Summary: Microemulsions are formulated using straight-chain aliphatic alcohols as surfactant-free water-in-diesel microemulsions, and their water solubilization is found to be dependent on the hydrophilic-lipophilic balance (HLB) of the alcohols. The microemulsions have average water droplets smaller than 10 nm and show maximum water solubilization within a specific HLB range.
Article
Chemistry, Physical
Lei Ding, Qianhui Wu, Xuan Zhang, Jijiang Ge
Summary: The phase behavior of anionic surfactants in different sodium electrolytes was investigated in this study. It was found that the sodium activity at the optimal salinity was equal between different sodium electrolytes. The solubilization parameter of water or oil at the optimal salinity was not influenced by the anions, but dependent on the alcohol type, oil type, and temperature. Furthermore, the addition of oleic acid into the model oil showed that its solubilization parameter at optimal salinity varied depending on the type of sodium used.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Muhammad Ali, Nilesh Kumar Jha, Nilanjan Pal, Alireza Keshavarz, Hussein Hoteit, Mohammad Sarmadivaleh
Summary: The oxidation of fossil fuels leads to significant CO2 emissions, contributing to global warming. Storing CO2 in underground formations is a potential solution, but the presence of organic material in geological formations affects storage potential. Studying the wetting characteristics and the impact of organic material is crucial for understanding CO2 behavior and enhancing storage capacity.
EARTH-SCIENCE REVIEWS
(2022)
Article
Chemistry, Physical
Muhammad Ali, Nurudeen Yekeen, Nilanjan Pal, Alireza Keshavarz, Stefan Iglauer, Hussein Hoteit
Summary: The study found that the presence of organic acids at specific pressures and concentrations can affect the wetting characteristics of geological formations, potentially leading to H-2 gas leakage. The influence of organic contamination in realistic geostorage conditions should be considered to avoid overpredicting structural trapping capacities and H-2 containment security.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Moumita Maiti, Prathibha Pillai, Aniruddha Sharma, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: In this study, the effect of two ionic liquids on the formation and dissociation of hydrates was investigated. The results showed that these ionic liquids were effective in inhibiting hydrate formation both thermodynamically and kinetically. The induction time and formation rate of hydrates were significantly increased in the presence of these ionic liquids compared to pure water. Additionally, the performance of the ionic liquids in hydrate inhibition increased with increasing alkyl chain length.
Article
Chemistry, Physical
Rohit Kumar Saw, Prathibha Pillai, Ajay Mandal
Summary: In recent decades, low salinity water flooding (LSWF) has gained attention for its effectiveness in oil recovery. However, there is a lack of studies in the literature on the potential of using Ionic Liquids (ILs) as candidates for chemical enhanced oil recovery (CEOR) combined with LSWF. This study evaluates the synergistic effect of ILs with varying chain lengths with low saline ion tuned seawater (ITSW) for enhanced oil recovery from carbonate reservoirs. The analysis shows that ILs demonstrate a better synergistic effect with ITSW, reducing interfacial tension, altering rock wettability, and exhibiting less adsorption density at the reservoir temperature. ILs with the longest chain length ([C12mim] [BF4]) show superior properties and significantly increase oil recovery in low saline ITSW.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Dinesh Joshi, Neetish Kumar Maurya, Narendra Kumar, Ajay Mandal
Summary: This study investigates the use of silica nanoparticles, surfactants, and polymers in enhancing oil recovery from oil fields. The synergy of these components is shown to reduce interfacial tension, alter wettability, emulsify, and improve viscosity. Core flooding experiments demonstrate that the nanofluid system provides higher incremental oil recovery, particularly in high permeability cores. Different mechanisms, including wettability alteration and pore plugging, contribute to the increased recovery. This research provides valuable insights into the application of silica nanoparticles with surfactants and polymers as chemical enhanced oil recovery agents.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Review
Energy & Fuels
Nilanjan Pal, Yara Alzahid, Abdulkareem M. AlSofi, Muhammad Ali, Hussein Hoteit
Summary: The area of conformance improvement technology (CIT) involves the use of various conventional fluids, such as polymers, gels, foams, bacteria, and emulsions. However, these methods have limitations due to degradation, damage, and segregation issues. To overcome these problems, microemulsions, which are stable fluids with tunable properties, can be used by injecting the optimal dosage of surfactants. Microemulsions can plug high permeability pore throats and improve flow stability through molecular interactions. However, more research is needed to validate their design and application for conformance improvement.
Article
Chemistry, Physical
Rohit Kumar Saw, Anshuman Singh, Neetish Kumar Maurya, Ajay Mandal
Summary: Low salinity water flooding is cost-effective and environmentally friendly, and the addition of nanoparticles and polymers can significantly increase oil recovery. The viscosity of complex chemical slugs can be increased by adding nanoparticles to polymer solutions. Low salinity water requires a lower concentration of polymer to reach the target viscosity compared to high saline formation water. The addition of nanoparticles reduces interfacial tension and contact angle, leading to higher oil recovery in low salinity water. Injection of low salinity water-based complex fluid results in incremental recovery of OOIP compared to low salinity water and conventional formation water flooding.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Nilanjan Pal, Yara Alzahid, Abdulkareem M. AlSofi, Muhammad Ali, Xuan Zhang, Hussein Hoteit
Summary: This article discusses the use of microemulsion-assisted conformance improvement technology (ME-CIT) to decrease the water-to-oil ratio during production operations. Experimental validation is carried out to identify the phase behavior of surfactant-based microemulsions. The results show the presence of different Winsor phases at varying salinity levels and demonstrate the favorable flow attributes of microemulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Rohit Kumar Saw, Deep Sinojiya, Prathibha Pillai, Shubham Prakash, Ajay Mandal
Summary: This study aims to investigate the synergistic effects of two nonionic surfactants (Tergitol 15-S-12 and PEG 600) on surface properties, including surface tension, interfacial tension (IFT), and wettability alteration, in chemically enhanced oil recovery (EOR). The optimum composition of the surfactant mixture, determined through surface tension measurement, showed a minimum surface tension value of 30.3 mN/m at a concentration of 225 ppm of Tergitol 15-S-12 and 1 wt % of PEG 600. The surfactant mixture exhibited an ultra-low IFT of 0.672 mN/m at optimum salinity. The wettability alteration study revealed a shift in rock wettability from oil-wet to water-wet region through contact angle observations and X-ray diffraction analysis.
Article
Energy & Fuels
Rohit Kumar Saw, Ajay Mandal
Summary: The low salinity water flooding (LSWF) technique is cost-effective and environmentally friendly, but its mechanisms are not yet clear. Recovery in LSWF depends on fluid/fluid and rock/fluid interactions. This study investigated both interactions and found different optimal conditions for improved oil recovery. Rock/fluid interaction showed an incremental recovery of 14%, while fluid/fluid interaction showed an incremental recovery of 7% over simple seawater injection. Results highlight the importance of considering both interactions and wettability alteration in LSWF design.
Article
Chemistry, Physical
Dinesh Joshi, Neetish Kumar Maurya, Ajay Mandal
Summary: The application of graphene oxide nanosheets (GONs) in enhanced oil recovery has been shown to have unique characteristics, including reduction of interfacial tension and alteration of wetting properties. Experimental results demonstrate that GONs can alter the wettability of rock surfaces, leading to increased oil recovery.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Chemistry, Multidisciplinary
Merajul Islam, Sanjive Kumar, Neha Saxena, Amina Nafees
Summary: Photocatalytic degradation is an environmentally friendly and cost-effective method for treating dye-contaminated water. This review article provides an overview of the latest developments in photocatalysis processes for dye degradation in industrial effluents. The authors classify photocatalyst materials into three generations and analyze various phenomena to achieve efficient degradation. The article also discusses photocatalytic fuel cell technology and the assessment of photocatalyst efficacy, aiming to address challenges and uncertainties in implementing this technology.
Article
Multidisciplinary Sciences
Nilanjan Pal, Yara Alzahid, Abdulkareem M. Alsofi, Muhammad Ali, Nurudeen Yekeen, Hussein Hoteit
Summary: This paper presents a systematic approach for designing and formulating surfactant-stabilized microemulsions for enhanced oil recovery. The methodology involves extensive laboratory work and functional assessments, considering factors such as cost, environment, and reservoir considerations.
Article
Energy & Fuels
Moumita Maiti, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: Hydrate inhibitors are crucial for preventing hydrate growth and ensuring smooth drilling operations. Water-soluble polymers, such as polyvinyl pyrrolidone (PVP K-90), have been found effective in reducing hydrate formation rates. This study investigates the influence of PVP K-90 concentration on hydrate inhibition in predesigned drilling fluids containing methane, ethane, and propane.
GAS SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Rohit Kumar Saw, Pranali M. Rane, Dinesh Joshi, Shubham Prakash, Lavisha Jangid, Ajay Mandal
Summary: In recent years, there has been increasing interest in the application of natural surfactants in enhanced oil recovery (EOR) due to environmental concerns. This study introduces a novel non-ionic surfactant synthesized from olive oil and evaluates its properties. The synthesized surfactant showed effective emulsification, wettability modification, and efficient oil displacement. Additionally, the surfactant had a low critical micelle concentration, indicating its ability to reduce interfacial tension.
JOURNAL OF MOLECULAR LIQUIDS
(2023)