Article
Chemistry, Physical
Mohammad Barari, Mostafa Lashkarbolooki, Reza Abedini
Summary: The investigation focused on new families of ionic liquid (IL) based surfactants for enhanced oil recovery. Imidazolium based ILs with different alkyl chain lengths were synthesized and their effects on interfacial tension, emulsification, and wettability alteration were examined. Results showed different responses to NaCl and Na2SO4 salts based on the alkyl chain length of the ILs.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Priya Pandey, Anthony E. Somers, Samik K. Hait, Maria Forsyth, S. S. Ramakumar
Summary: The short chain ILs as lubricant additives can significantly reduce friction and wear, and can avoid evidence of tribo-chemical reactions on the steel surface.
Article
Biochemistry & Molecular Biology
Nestor Tafur, Alberto P. Munuzuri, Ana Soto
Summary: Surfactant blends show promising experimental performance in recovering remaining crude oil in carbonate reservoirs. A blend of dioctyl sulfosuccinate sodium (AOT) and polyoxyethylene(8) octyl ether carboxylic acid (Akypo LF2) in synthetic sea water (SSW) achieved low interfacial tension and moderate additional oil recovery. Adding the ionic liquid 1-dodecyl-3-methylimidazolium bromide ([C(12)mim]Br) improved the surface activity and significantly increased the additional oil recovery in the blend.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Katherine S. Lefroy, Brent S. Murray, Michael E. Ries
Summary: This study investigates the effect of oil addition on the dissolving capacity of the ionic liquid BmimAc for cellulose. The results indicate that the order of mixing constituents plays a key role in the dissolution process, with hydrophobic interactions being crucial. The findings highlight the need for further evaluation of accepted mechanisms for cellulose dissolution in ionic liquids.
Article
Chemistry, Physical
Radman Hosseinzadeh Semnani, Mahsa Baghban Salehi, Babak Mokhtarani, Ali Sharifi, Mojtaba Mirzaei, Vahid Taghikhani
Summary: This study investigates the performance of novel ionic liquids in a lab-scale Enhanced Oil Recovery (EOR) setup compatible with Iranian oil reservoir conditions. The results demonstrate the resistance of these ionic liquids to harsh reservoir conditions and their potential to improve oil field production efficiency.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Mohsen Ramezani, Mostafa Lashkarbolooki, Reza Abedini, Mohammad Barari
Summary: Imidazolium-based ionic liquids are environmentally friendly surfactants that show high performance in reducing interfacial tension. Adjusting the ion composition of the aqueous media is an important feature in smart water-enhanced oil recovery. The nature of the oil type has a dominant effect on the surface activity of [C(12)mim]Cl compared to the effect of ion type (brine composition).
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Bennet Nii Tackie-Otoo, Mohammed Abdalla Ayoub Mohammed, Hazman Akmal Bin Mohd Zalghani, Anas M. Hassan, Pearl Isabellah Murungi, Grace Amabel Tabaaza
Summary: This study investigates the potential of a combination of 1-hexadecyl-3-methyl imidazolium bromide (C(16)mimBr) and monoethanolamine (ETA) as an alkali-surfactant (AS) formulation for enhanced oil recovery in carbonate reservoirs at high salinity, high-temperature conditions.
Article
Engineering, Chemical
Dongmei Xu, Shanshan He, Chengyi Yuan, Lijie Peng, Wenyang Fan, Huiwen Huang, Jun Gao, Yinglong Wang
Summary: In this study, liquid-liquid extraction was used to separate the mixture of IPAC and IPA, with three ionic liquids demonstrated as effective extractants, particularly [Bmim] [Hi(2)PO(4)]. The experimental data was fitted using the NRTL model to optimize the separation process for industrial applications.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(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
Energy & Fuels
Nabeel K. Abbood, Nawfal Adnan Dahham, Mohammad Assarehzadegan Dezfouli, Seyednooroldin Hosseini
Summary: The usage of enhanced oil recovery methods has increased in recent years due to improvements in energy consumption and reservoir pressure. However, there is a lack of generalized understanding of interfacial tension and wettability changes in different crude oils, making it necessary to study specific fractions such as resin and asphaltene. Previous investigations on the interactions between these fractions and salts have been limited, particularly in the presence of alkaline and surfactant. By dissolving asphaltene in toluene, it was observed that increasing asphaltene concentration led to a decrease in interfacial tension. Additionally, the presence of MgCl2 and NaCl resulted in further reduction of interfacial tension, with MgCl2 showing a greater impact. Further experiments examined the effects of resin fraction and other chemicals on interfacial tension and rock wettability, leading to the development of an optimum chemical formulation that significantly reduced interfacial tension and increased oil recovery.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Thermodynamics
P. V. S. S. Rama Rao, T. S. Krishna, Ponnuri Bharath, Ranjan Dey, D. Ramachandran
Summary: This study examines the properties of binary blends of 1-butyl-3-methylimidazolium bis(trifluromethylsulfonyl)imide ionic liquid with Ethyl acetate at various temperatures, discussing molecular interactions and temperature effects through excess properties. The results are adequately fitted with the Redlich-Kister polynomial equation, providing insight into molecular interactions and temperature effects.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Chemistry, Physical
Ksenia S. Egorova, Marina M. Seitkalieva, Alexey S. Kashin, Evgeniy G. Gordeev, Anna V. Vavina, Alexandra V. Posvyatenko, Valentine P. Ananikov
Summary: This study investigated the cytotoxicity of chemically relevant imidazolium PILs with different alkyl side chains and compared it with aprotic analogues. The results highlighted the role of anion type in determining the cytotoxicity of ILs with short alkyl side chains. Even low-toxic PILs showed harmful effects on eukaryotic cells when used as cryopreservation agents, and the studied IL/water mixtures tended to form simple solid hydrates due to the weak amphiphilic properties of imidazolium cations with short alkyl side chains.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Himanshu Kesarwani, Amit Saxena, Neha Saxena, Shivanjali Sharma
Summary: A novel biodegradable surfactant was developed from Karanj oil, which showed promising potential in enhancing oil recovery efficiency through thermal stability and reducing interfacial tension. The surfactant effectively altered the wetting behavior of the sand surface and exhibited lower adsorption compared to conventional anionic surfactants. Sand pack flooding tests indicated that using the ASP slug designed with Karanj oil surfactant led to the additional recovery of approximately 32% of crude oil after water flooding.
Article
Engineering, Chemical
Baudilio Coto, Inmaculada Suarez, Maria Jose Tenorio, Sandra Nieto, Nieves Alvarez, Jose Luis Pena
Summary: In this study, reduction of crude oil acidity through the use of ionic liquids (ILs) was investigated, showing up to 50% reduction in TAN under certain conditions. However, challenges such as increased IL acidity and decreased extraction efficiency were observed, impacting the feasibility of IL reuse. Modeling with COSMO-RS provided insights into IL characterization and the effects of temperature on TAN reduction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Polymer Science
Biao Zhang, Guillaume Sudre, Guilhem Quintard, Anatoli Serghei, Julien Bernard, Etienne Fleury, Aurelia Charlot
Summary: This study mixed RAFT-made poly(ionic liquid) chains with an ionic liquid, leading to homogeneous and transparent solutions due to similarities in structure and polarity. Rheology investigation showed that the solution's viscoelastic properties can be finely tuned by adjusting the chain molar mass and concentration. The high ionic conductivity and multi-scale local homogeneity of the PIL/IL solutions were confirmed through X-ray scattering experiments and microscopy analysis.
Article
Engineering, Chemical
Marlen Gonzalez-Amado, Ana P. M. Tavares, Mara G. Freire, Ana Soto, Oscar Rodriguez
Summary: This study investigated the use of Aqueous Two-Phase Systems (ATPS) for the recovery of lactose, BSA, beta-lactoglobulin and alpha-lactalbumin from cheese whey. Different ATPS were studied for partitioning the selected solutes, showing efficient recovery of proteins and lactose under optimized conditions. This polymer/salt ATPS method could be a scalable and cost-effective separation strategy for cheese whey and related wastes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Thermodynamics
Alberto Arce, Alberto Jr Jr Arce, Oscar Rodriguez
Summary: The article aims to clarify concepts and aspects of experimental determination and treatment of liquid-liquid equilibrium data for ternary systems. The importance of using semiempirical models for data correlation is emphasized.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Chemistry, Physical
Nuria Caeiro, Marta K. Wojtczuk, Hector Rodriguez, Eva Rodil, Ana Soto
Summary: This study explores the feasibility and conditions for recovering ionic liquids from mixtures with molecular solvents. The results indicate the difficulty of achieving high-purity recovery of ionic liquids even at low pressure and close to the temperature range where their thermal stability is compromised.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Alba Somoza, Nestor Tafur, Alberto Arce, Ana Soto
Summary: This paper proposes a solution for the application of petroleum sulfonates in carbonate reservoirs by blending them with surface-active ionic liquids. Optimal blend ratios were found through experiments and the performance of the blends was tested. The results showed promising oil recovery and low adsorption, indicating the effectiveness of the solution.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Carlos A. Pena, Alberto Puga, Andreas Metlen, Ana Soto, Hector Rodriguez
Summary: Non-dissolving pretreatment can reduce the crystallinity of cellulose and improve its reactivity without affecting its degree of polymerization and thermal stability.
Article
Thermodynamics
Antonio Marcilla, Maria del Mar Olaya, Paloma Carbonell-Hermida, Marta K. Wojtczuk, Hector Rodriguez, Eva Rodil, Ana Soto
Summary: Several physical properties and isobaric vapor-liquid equilibria were measured for a binary system of acetone and the ionic liquid 1-ethyl-3-methyl-imidazolium acetate. Liquid-liquid equilibria data were also measured. The study proposed a new model with a correction term based on the analysis of excess Gibbs energy, which could simultaneously correlate both sets of equilibrium data with high accuracy.
FLUID PHASE EQUILIBRIA
(2022)
Article
Chemistry, Physical
Nestor Tafur, Alba Somoza, Ana Soto
Summary: Better utilization of already developed oil reservoirs is crucial, and Enhanced Oil Recovery techniques play an important role in achieving this. Blending multiple surfactants is a common approach when individual surfactants are not effective, but determining the optimal conditions for application can be challenging due to numerous variables involved. This study evaluated blends of surfactants for oil recovery and found that activity maps were useful tools in describing conditions leading to Winsor type III systems.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Akram Al-Asadi, Alberto Arce, Eva Rodil, Ana Soto
Summary: Surface-active ionic liquids (SAILs) have expanded the possibilities of surfactant enhanced oil recovery (EOR) methods. In this study, the combination of SAIL 1-dodecyl-3-methylimidazolium chloride, [C(12)mim]Cl, with Al2O3 nanoparticles was proposed for EOR. The nanofluid showed reduced adsorption of the surfactant-polymer formulation on carbonate rocks and changed the aged rock wettability from oil-wet to water-wet, resulting in higher oil recovery compared to the surfactant-polymer formulation alone.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biochemistry & Molecular Biology
Nestor Tafur, Alberto P. Munuzuri, Ana Soto
Summary: Surfactant blends show promising experimental performance in recovering remaining crude oil in carbonate reservoirs. A blend of dioctyl sulfosuccinate sodium (AOT) and polyoxyethylene(8) octyl ether carboxylic acid (Akypo LF2) in synthetic sea water (SSW) achieved low interfacial tension and moderate additional oil recovery. Adding the ionic liquid 1-dodecyl-3-methylimidazolium bromide ([C(12)mim]Br) improved the surface activity and significantly increased the additional oil recovery in the blend.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Cristina Gallego, Hector Rodriguez, Ana Soto
Summary: Industrial fish and aquaculture processing generates a large amount of by-products, causing environmental consequences and economic losses. This study explores the use of a eutectic mixture of urea and sodium acetate trihydrate as a solvent for collagen extraction from these by-products. The solubility of fish collagen's main amino acids in this solvent was investigated at different temperatures and pressures, showing promising results. Dilution with water increased solubilities and allowed for operation at lower temperatures. The findings suggest that the eutectic and its mixture with water could be environmentally friendly solvents for collagen extraction.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Chemistry, Multidisciplinary
Akram Al-Asadi, Eva Rodil, Ana Soto
Summary: The use of nanofluids as an enhanced oil recovery method is showing promise. This new study aims to collect information about the most promising nano-EOR methods according to their performance in core-flooding tests and provides useful information for researchers interested in experimental application of nano-EOR methods. The use of simple nanoparticles in water or brine formulations has shown additional oil recoveries up to 15% of the original oil in place, with even higher recoveries when combined with smart water or magnetic fields. However, practical applications need to consider the cost, difficulty of preparation, and stability of the formulations, and experimental limitations may offer misleading results.
Article
Energy & Fuels
Nestor Tafur, Aleksandr Mamonov, Md Ashraful Islam Khan, Ana Soto, Tina Puntervold, Skule Strand
Summary: Ionic modification of injected brines (Smart Water EOR) has shown potential for wettability alteration in carbonate reservoirs. Surface-active ionic liquids, such as [C(12)mim]Br and [C12Py]Cl, added to Smart Water, can improve oil recovery by changing the wettability in low-temperature carbonate reservoirs.
Article
Energy & Fuels
Alba Somoza, M. Flor Garcia-Mayoral, Ana Soto
Summary: Due to the heavy reliance on crude oil, it is crucial to develop enhanced oil recovery techniques for better reservoir production and lifespan. Carbonate reservoirs make up more than half of the global oil reserves, but their recovery is challenging due to complex pore structure, oil-wet or mixed-wet rocks, and harsh temperature and salinity conditions. This work presents a significant contribution in exploiting these reservoirs through the design of a new formulation with low interfacial tension and reduced adsorption on carbonate rocks, resulting in promising oil recovery.
Article
Energy & Fuels
Akram Al-Asadi, Alba Somoza, Alberto Arce, Eva Rodil, Ana Soto
Summary: This research investigates the combination of nanoparticles (Al2O3) and surface-active ionic liquid (C12py)Cl for enhanced oil recovery. The addition of nanoparticles and stabilizer PVP increases the viscosity and reduces the interfacial tension of the foam system. The nanofluid formulation shows potential for application in brine and can alter the wettability of carbonate rocks.
Review
Energy & Fuels
Alba Somoza, Alberto Arce, Ana Soto
Summary: The main advantages of using ionic liquids in enhanced oil recovery are their tunability and stability in harsh environmental conditions. This comprehensive review focuses on core flooding experiments and presents promising results with up to 32% additional oil recovery. Most studies have been conducted on sandstone reservoirs, with limited research on carbonate cores. The application of a new room temperature surface active ionic liquid shows a significant reduction in water/oil interfacial tension and a recovery increase of 10.5% in carbonate reservoirs. Combining this method with polymer flooding reduces costs while maintaining significant recovery.
