Article
Chemistry, Physical
Qun Zhang, Lu Han, Huoxin Luan, Jia Ren, Chongjun Xu, Gen Li, Hongyan Xiao, Zhaohui Zhou, Lu Zhang
Summary: The synergistic effects of betaines and anionic extended surfactants with self-regulating ability in reducing interfacial tensions (IFTs) have been validated through experiments and molecular dynamics simulation. The IFTs of different combinations of betaines and alkyl polypropylene ether sulfonates (APS) in solutions against decane and crude oil were investigated. The results show that the IFTs decrease with the increase of propylene oxide (PO) numbers in APS surfactants and the determining factor for IFT reduction in the mixed systems is size compatibility. The flexible PO group in APS surfactants enables them to exhibit synergistic effects with different betaines. The findings contribute to the understanding of mixed surfactant solutions in enhanced oil recovery.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Xiang-Long Cui, Yi Pan, Fu-Tang Hu, Lu Han, Xiu-Yu Zhu, Lei Zhang, Zhao-Hui Zhou, Gen Li, Gui-Yang Ma, Lu Zhang
Summary: Betaine is a promising surfactant for high-temperature and high-salinity reservoirs. This study evaluated the interfacial properties of two betaine mixtures and investigated the effects of temperature-resistant, salt-resistant polymers on dynamic interfacial tensions. The results showed that the addition of anionic surfactants improved the solubility of betaine in oil or water, and the addition of water-soluble polymers enhanced the water solubility of betaine solutions. The polymers affected the interfacial tensions by regulating the HLB of the surfactant solutions.
Article
Chemistry, Physical
Jia Ren, Hongyan Xiao, Xulong Cao, Fuqing Yuan, Binlin Pan, Baodong Ma, Lei Zhang, Lu Zhang
Summary: The mixed system of betaine and extended surfactants was studied to understand its effects on interfacial properties and interfacial tension (IFT) reduction. Molecular dynamics simulations and IFT measurements were conducted to analyze the effects of betaine structure and length of oxypropylene (PO) chain of extended surfactant. The results showed that the interfacial behavior of short PO chain was controlled by betaine structure, while that of long PO chain was independent of betaine structure. The xylyl substituted alkyl sulfobetaine (XSB) mixed with short PO chain extended surfactant system exhibited significant synergistic effect in reducing IFT, while it had a negative effect with long PO chain extended surfactant.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Lu Han, Huoxin Luan, Jia Ren, Qun Zhang, Chongjun Xu, Gen Li, Hongyan Xiao, Zhaohui Zhou, Lei Zhang, Lu Zhang
Summary: The interfacial tension (IFT) values of sodium dialkyl sulfosuccinates (AOT) mixed with different betaines (alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB)) against n-alkanes and crude oil were determined by the spinning drop method. Molecular dynamics (MD) simulation was used to study the interaction mechanism between AOT and different betaine molecules. The results showed that AOT molecules reached hydrophilic-lipophilic balance and formed a compacted interfacial film at the dodecane-water interface, leading to reduced IFT values.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Afraz Subratti, Lorale J. Lalgee, Nigel K. Jalsa
Summary: Lipophosphoramidates are a class of tunable amphiphilic molecules that enhance the bioavailability and selectivity of drug molecules. This study reports the synthesis of novel glyco-lipophosphoramidates and investigates their surface activity and aggregation behavior in aqueous solution using various techniques. The results demonstrate the potential for drug delivery or nanocarrier applications of these molecules.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
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
Qi Sun, Zhao-Hui Zhou, Chuan-Min Xiao, Ming Gao, Lu Han, Qi-Cheng Liu, Lei Zhang, Qun Zhang, Lu Zhang
Summary: Betaine, specifically linear alkylbenzene sulfonate betaine (ASB), has been studied as a surfactant for enhanced oil recovery (EOR). The interfacial properties of ASB were characterized using various methods, and it was found that the difference in interfacial tension had a greater impact on EOR than the interfacial film strength of betaine.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Shengwei Zhang, Bo Peng, Qi Liu, Zhen Liu
Summary: In current chemical flooding technology, the preference for surfactant and polymer (SP) over alkali, surfactant and polymer (ASP) flooding is due to environmental concerns associated with adding alkali in ASP flooding. Understanding the interaction between petroleum sulfonate (PS) and alkali in reducing interfacial tension (IFT) is crucial for finding a more eco-friendly alternative to alkali in SP flooding. The study found that the electrolyte property of Na2CO3, rather than its alkalinity, plays a major role in reducing IFT, and that unsulfonated oil is an indispensable component of PS. The potential of NaCl to replace Na2CO3 in supporting the PS-mediated reduction of IFT in SP flooding was demonstrated in the results.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Qi Zuo, Zhihui Wang, Peng Li, Luyuan Yang, Zhaozheng Song
Summary: Two novel betaine surfactants, carboxybetaine surfactant (DCB) and sulfobetaine surfactant (DSB), were synthesized and their properties in reducing the interfacial tension (IFT) of Xinjiang crude oil/water were studied. The addition of a benzene ring to the hydrophobic group improved the solubility and high-temperature resistance of the betaine surfactant. DCB exhibited higher wetting ability compared to DSB, and both surfactants significantly reduced the IFT of Xinjiang crude oil/water to ultra-low levels in the absence of alkali. The presence of certain ions had a synergistic effect on the surfactants' ability to reduce the interfacial tension.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Varun Mandalaparthy, W. G. Noid
Summary: Recent studies have shown that cosolute mixtures have significant non-additive effects on protein stability. The liquid-vapor interfaces provide useful insights into these effects. This work relates the interfacial properties of dilute multicomponent solutions to solute interactions. A simple model for solute surface excess is derived, and a lattice-based statistical mechanical perturbation theory is developed to calculate this model from microscopic interactions. Monte Carlo simulations demonstrate that this dilute solution theory describes interactions with greater accuracy than regular solution theory. Importantly, this theory distinguishes between intrinsic and effective preferences of solutes for interfaces, and predicts qualitative inversion of surface preference for different classes of solutes.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Energy & Fuels
Kwang Hoon Baek, Mingyan Liu, Francisco J. Arguelles-Vivas, Gayan A. Abeykoon, Ryosuke Okuno
Summary: This paper presents an experimental study on low-tension polymer (LTP) flooding using a short-hydrophobe surfactant as the sole additive. The effect of surfactant partition coefficients on LTP flooding is examined, showing that the surfactant partition coefficient can impact the oil recovery through its influence on the surfactant in-situ propagation. Optimization of the surfactant for LTP flooding involves balancing the reduction in water/oil interfacial tension and the efficiency of surfactant propagation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Keith D. Hillaire, Praneshnandan Nithyanandam, Minyung Song, Sahar Rashid Nadimi, Abolfazl Kiani, Michael D. Dickey, Karen E. Daniels
Summary: This paper presents a suite of techniques to measure the electrical and interfacial properties of room-temperature liquid eutectic gallium indium (EGaIn) as a function of applied electric potential. The study provides new insights into the mechanisms that cause the significant decrease in interfacial tension. A key finding is the hysteresis behavior of the interfacial tension with lowering applied potential. The authors combine these observations with electrochemical impedance spectroscopy to evaluate the changes in interfacial tension arising from chemical, electrical, and mechanical changes on the interface.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Wenlong Zhang, Jian Hou, Yongge Liu, Weidong Cao, Kang Zhou, Qingjun Du
Summary: A method for estimating relative permeability was developed by matching production data obtained through experiments and numerical simulation, and the necessity of considering surfactant adsorption and diffusion in calculating relative permeability was proven. The results show that surfactant adsorption and diffusion affect the relative permeability, but not the change in the relative permeability curves for varying interfacial tension (IFT).
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(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
Multidisciplinary Sciences
Qian Wang, Abdullah Alowaifeer, Patricia Kerner, Narayanaganesh Balasubramanian, Angela Patterson, William Christian, Angela Tarver, John E. Dore, Roland Hatzenpichler, Brian Bothner, Timothy R. McDermott
Summary: Reports of biogenic methane synthesis associated with various organisms have accumulated, but understanding of the process at the genetic and enzyme levels remains limited. The methane paradox of CH4 supersaturation in oxic surface waters in marine and freshwater environments challenges the traditional view of strictly anaerobic CH4 synthesis. Recent interest in the phenomenon highlights the importance of comprehending sources and sinks of this potent greenhouse gas.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
Feng Wang, Linlin Shao, Xuan Zhang
JOURNAL OF MOLECULAR STRUCTURE
(2015)
Article
Chemistry, Multidisciplinary
Feng Wang, Xuan Zhang, Linlin Shao, Zhenggang Cui, Tingting Nie
Article
Chemistry, Multidisciplinary
Feng Wang, Yong Ma, Yanhua Liu, Zhenggang Cui, Xiaoyan Ying, Fuming Zhang, Robert J. Linhardt
SEPARATION SCIENCE AND TECHNOLOGY
(2017)
Article
Biochemistry & Molecular Biology
Feng Wang, Yan-Hua Liu, Yong Ma, Zheng-Gang Cui, Lin-Lin Shao
PROCESS BIOCHEMISTRY
(2017)
Article
Biochemistry & Molecular Biology
Feng Wang, Ting Ting Nie, Lin Lin Shao, Zhenggang Cui
BIOCATALYSIS AND BIOTRANSFORMATION
(2014)
Article
Biochemistry & Molecular Biology
Feng Wang, Pei Liu, Tingting Nie, Huixian Wei, Zhenggang Cui
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2013)
Article
Biochemistry & Molecular Biology
Zhibin Liu, Han Bao, Jin Cai, Jun Han, Lirong Zhou
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2014)
Article
Biochemistry & Molecular Biology
Feng Wang, Dengfa Huang, Yong Ma, Fuming Zhang, Robert J. Linhardt
BIOCATALYSIS AND BIOTRANSFORMATION
(2019)
Article
Chemistry, Physical
Feng Wang, Jinwen Zhu, Tingting Yan, Xiaomei Pei, Fuming Zhang, Robert J. Linhardt
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Engineering, Chemical
Dengfa Huang, Feng Wang, Jingwen Zhu, Xiaomei Pei
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Chemistry, Applied
Feng Wang, Lu Yu, Youhua Li, Dengfa Huang
Summary: Support-free cross-linked polyethyleneimine sorbent (CPEI) was evaluated as a regenerable sorbent for CO2 capture, showing high CO2 capacity in slurry bubble column reactor and stable performance during temperature swing adsorption/desorption cycles. The diffusion resistance was found to have a more significant impact on adsorption than the driving force.
ADSORPTION SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Feng Wang, Lu Yu, Chao Li, Xiaofeng Xia, Fuming Zhang, Robert J. Linhardt
Summary: In this paper, a reusable heterogeneous catalyst of papain was prepared and used to catalyze the polymerization for oligo-glutamate. The immobilization of papain on PS-PEG-DDI increased its stability and resistance to metal ions, and resulted in a higher yield of oligo-glutamate. The immobilized papain also showed a more favorable active conformation, leading to a reduced activation energy and improved catalytic activity.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Multidisciplinary
Feng Wang, Youhua Li, Lu Yu, Jinwen Zhu, Fuming Zhang, Robert J. Linhardt
Article
Biochemistry & Molecular Biology
Feng Wang, Yong Ma, Yan-Hua Liu, Xuan Zhang, Fuming Zhang, Robert J. Linhardt
BIOCATALYSIS AND BIOTRANSFORMATION
(2017)