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
Chemistry, Physical
Kei Watanabe, Yuki Watanabe, Kazuki Masuda, Zhang Yang, Ami Kaneshima, Akira Motoyama, Takaaki Shima, Koji Tsuchiya, Hideki Sakai
Summary: This study investigates the formation of the sponge phase in a commercial polyethoxylated nonionic surfactant system. The irregularity of the phase formation is revealed, and the important factors for sponge phase formation are identified. Furthermore, the study demonstrates the phenomenal wetting behavior of the sponge phase on a hydrophobic surface with unevenness.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
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
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
Chemistry, Applied
Frederike Cattelaens, Thomas Myrdek
Summary: Parameters concerning the microemulsion phase behavior of nonionic surfactants of the alkyl polyglycol ether type have been extensively investigated in recent years. This study focused on the influence of technical grade nonionic surfactants on phase behavior and surfactant efficiency. The results show that varying the alkyl chain length has a significant impact on efficiency, while the ethoxylation degree has a minor effect. The introduction of propylene oxide improves the efficiency, and the order of alkoxylation is crucial.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2023)
Article
Medicine, Research & Experimental
Amali G. Guruge, Dallas B. Warren, Hassan Benameur, Leigh Ford, Hywel D. Williams, Vincent Jannin, Colin W. Pouton, David K. Chalmers
Summary: This study utilized molecular dynamics simulations and experimental validation to investigate the phase behavior of Type III lipid-based formulations in the gastrointestinal tract, providing valuable insights for the design of efficient drug delivery systems.
MOLECULAR PHARMACEUTICS
(2021)
Article
Chemistry, Multidisciplinary
Zhonghao Chen, Hongping Quan, Zhiyu Huang, Yang Wu
Summary: In this study, a nonionic acidizing retarder AAO was synthesized and its effect on the reaction between hydrochloric acid and carbonate rock was investigated. The results showed that AAO could defer the acid-rock reaction and its adsorption behavior followed the pseudo-second-order kinetic model. In addition, the addition of urea reduced the adsorption amount of AAO. The findings of this study contribute to the research on carbonate acidizing for reservoir stimulation.
Article
Energy & Fuels
Ekarong Sukjit, Atthaphon Maneedaeng
Summary: Microemulsion biofuels, prepared from rice bran oil and ethanol using mixed nonionic surfactant systems, showed good solubility and fuel properties, although some parameters were slightly substandard. Experimental data revealed that the combustion and exhaust emission characteristics of microemulsion biofuels were promising, although less efficient than commercial diesel fuel.
Article
Biochemical Research Methods
Lei Zhao, Pengfei Niu, Eudald Casals, Muling Zeng, Chen Wu, Yang Yang, Sheng Sun, Zongwei Zheng, Zhaoxun Wang, Yuan Ning, Xuexin Duan, Wei Pang
Summary: This article explores the patterning and migration of submicron particles in a standing surface acoustic wave field, revealing that acoustic radiation force can be used to control the behavior of particles in a non-ionic surfactant solution. The migration of acoustically patterned locations is not limited to submicron particles, but also occurs in micrometer-sized particles in solutions with higher surfactant concentrations, opening up a novel avenue for controllable acoustic manipulation.
Article
Chemistry, Physical
Wenning Zhou, Long Jiang, Xunliang Liu, Yang Hu, Yuying Yan
Summary: The study found that mixed surfactants exhibit superior performance by attracting and reducing repulsion between molecules to improve interfacial properties. Controlling the number of ethylene oxide groups can prevent surfactant aggregation and enhance interfacial performance. The positive charge of DTAC molecules shows strong repulsion to salt ions, increasing the overall salt resistance of mixed surfactants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Yi Guo, Qiansong Wu, Cheng Yao
Summary: The newly synthesized pH-sensitive cationic-nonionic silicone surfactant exhibited excellent surface activity under different pH conditions, with significant changes in critical micelle concentration (CMC) and micelle particle size.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Polymer Science
G. Pier Villegas, A. G. Alvarado Mendoza, L. G. Guerrero, L. C. Rosales-Rivera, J. Aguilar, F. J. Moscoso
Summary: The polymerization process and the type of surfactant influence the properties of polyaniline, with the semicontinuous process showing higher conductivity and larger particle size compared to the batch process.
DESIGNED MONOMERS AND POLYMERS
(2022)
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
Chemistry, Physical
M. Turchi, A. P. Karcz, M. P. Andersson
Summary: The critical micelle concentration, a key property in formulation design, can be experimentally determined or computationally predicted. This study introduces a method based on interfacial tension calculations rooted in COSMO-RS theory for accurate prediction of various surfactants' critical micelle concentrations.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
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
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
