Article
Energy & Fuels
Shuyun Feng, Zhaowen Jiang, Shanfa Tang, Ruizhi Hu, Lijun Jin, Siyao Wang, Rui Wang
Summary: A series of new Gemini surfactants were synthesized and characterized, showing good interfacial activity and low CMC values, promising for oil recovery in low permeability reservoirs. Varying the carbon number of the hydrophobic chain can control the surface activity and viscoelastic properties, helping to increase the oil-water interfacial tension and enhance oil recovery efficiency in reservoirs.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Ahmed Al-Yaseri, Hesham Abdulelah, Nurudeen Yekeen, Muhammad Ali, Berihun Mamo Negash, Yihuai Zhang
Summary: The solid/CO2 interfacial tension in caprocks is highly dependent on total organic carbon (TOC) percentage, pressure, and quartz content. A higher percentage of TOC and quartz increases the hydrophobic sites available in the sample, allowing stronger affinity towards CO2. Lower interfacial tension implies a stronger affinity of CO2 towards caprock surface, increasing the chance of CO2 entering through caprocks and causing leakage.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Saman Hosseinpour, Vanessa Goetz, Wolfgang Peukert
Summary: This study used surface-sensitive SFG spectroscopy to demonstrate that the adsorption of surfactants to the oil/water interface increases the interfacial electric field and enhances the ordering of interfacial oil molecules. At high surfactant concentrations, the interfacial charge peaks and the interfacial oil molecules arrange in a fully ordered conformation, leading to decreased interfacial tension and increased emulsion stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Vivian J. Spiering, Jana Lutzki, Michael Gradzielski
Summary: The study demonstrates that the incorporation of CO2 moieties in the head group of nonionic surfactants reduces the critical micellization concentration, favoring the micellization process and decreasing the temperature sensitivity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Maria L. Goni, Nicolas A. Ganan, Raquel E. Martini
Summary: In recent years, the textile industry has shown a growing interest in supercritical fluid technology, particularly in the areas of dyeing and functionalization. The advantages of using supercritical carbon dioxide include improved transport properties and easier solvent recovery, resulting in faster processes, greater cost-effectiveness, and environmental friendliness.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Energy & Fuels
Gary R. Jerauld, Aboulghasem Kazemi
Summary: A new CO2-brine interfacial tension correlation has been developed to accurately estimate the CO2-brine IFT for various reservoir conditions. By considering density difference and accurate temperature dependence, the new correlation provides more comprehensive and accurate results compared to existing literature correlations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Composites
Qiuyu Tang, Qian Li, Xun Pan, Zhenhao Xi, Ling Zhao
Summary: The study demonstrates that grafting poly(acrylated epoxidized soybean oil) on the surface of multiwalled carbon nanotubes can enhance the dispersion and interface bonding of the composites, leading to improvements in thermal and mechanical properties.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Physical
Zachary R. Hinton, Nicolas J. Alvarez
Summary: This work presents a new high pressure microtensiometer technique for quantifying interfacial phenomena at elevated pressures and highlights the importance of establishing bulk equilibrium for measuring surface tension. The findings show discrepancies in surface tension values of CO2 vapor and water compared to literature reports, suggesting previous measurements were likely performed under non-equilibrium conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Izzreen Ishak, Norhayati Hussain, Ranil Coorey, Maaruf Abd Ghani
Summary: The quality of chia seed oil obtained by SC-CO2 extraction was compared with Soxhlet extraction and commercial cold-pressed oil, showing comparable results but lower oxidative stability. The study suggests that SC-CO2 extraction is an effective method to produce chia seed oil with excellent sources of PUFAs and tocopherols.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Thermodynamics
Junwei Cui, Shengshan Bi, Andreas P. Froeba, Jiangtao Wu
Summary: The study focuses on measuring the viscosity and interfacial tension of n-heptane with dissolved carbon dioxide using surface light scattering. Experiments were conducted at macroscopic thermodynamic equilibrium, with two hours required to reach equilibrium and typical uncertainties of 3% for both properties. Viscosity results correlated well with an empirical equation, while interfacial tension showed good agreement with literature data.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Review
Chemistry, Physical
Ming Zhou, Ruifeng Ni, Yaxiong Zhao, Jiangyu Huang, Xinyi Deng
Summary: Supercritical carbon dioxide thickeners have promising applications in oil and gas production for improved oil recovery. However, challenges such as low viscosity issues present obstacles in fracturing and flooding processes.
Review
Energy & Fuels
Funsho Afolabi, Syed M. Mahmood, Nurudeen Yekeen, Saeed Akbari, Hamid Sharifigaliuk
Summary: Polymeric surfactants have emerged as a viable alternative to conventional chemical methods in enhancing hydrocarbon recovery, offering multifunctional mechanisms such as viscosity increment and interfacial tension reduction for improved mobility control and fluid redistribution.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Juan Catala, Jesus Manuel Garcia-Vargas, Maria Jesus Ramos, Juan Francisco Rodriguez, Maria Teresa Garcia
Summary: This work thoroughly studied the epoxidation of grape seed oil in supercritical CO2, reporting for the first time in the literature the kinetic parameters of supercritical epoxidation of vegetable oils. The experimental work covered a wide range of conditions, evaluating major side reactions and secondary products.
Article
Engineering, Mechanical
Hongguang Deng, Min Zhong, Wenhu Xu
Summary: The effects of three different types of surfactants, including CTAB, SDBS, and AEO, on sapphire UV-CMP were investigated. AEO and SDBS caused abrasive agglomeration and slight particle size increase due to hydrogen bonding and electrostatic repulsion respectively. CTAB exhibited significant agglomeration of abrasive particles due to electrostatic attraction. The addition of 0.10% CTAB resulted in the best polishing effects with a sapphire MRR of 80.50 nm/min and a surface roughness of 0.200 nm.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Agricultural Engineering
Zhaolan Zhai, Shengfeng Ye, Xinyan Yan, Zhanqian Song, Shibin Shang, Xiaoping Rao
Summary: A novel bio-based polymeric surfactant P(AESO-PEGMA) derived from soybean oil was synthesized and characterized. The research showed that P(AESO-PEGMA) has excellent emulsifying ability to soybean oil and can enhance the stability of emulsions.
INDUSTRIAL CROPS AND PRODUCTS
(2021)