Article
Environmental Sciences
Wanhua Shen, Narayan Koirala, Debjani Mukherjee, Kenneth Lee, Min Zhao, Jianbing Li
Summary: This study investigated the preparation of stable conventional heavy crude oil-in-water (O/W) emulsions by mechanical homogenization with the addition of a non-ionic surfactant, Tween-20. The effects of four independent variables, including mixing intensity, mixing duration, water salinity, and the concentration of emulsifier, on the emulsion stability were studied using a central composite design. The results showed that the salinity of 30 g/L, mixing intensity of 8,500 rpm, mixing duration of 35 min, and emulsifier concentration of 1.6 wt% led to the formation of the most stable emulsion.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Qi Sun, Fu-Tang Hu, Lu Han, Xiu-Yu Zhu, Fan Zhang, Gui-Yang Ma, Lei Zhang, Zhao-Hui Zhou, Lu Zhang
Summary: This paper studied the influences of different surfactants on the viscosity of two polymers, HPAM and HMPAM, and conducted experiments in different reservoir environments. The results showed that surfactants acted as electrolytes to reduce the viscosity of HPAM, while they formed aggregates with the hydrophobic blocks of HMPAM molecules, reducing the bulk viscosity. However, zwitterionic surfactant BSB was able to build bridges between different polymer molecules through hydrogen bonding and electrostatic interaction, resulting in an increase in viscosity.
Article
Engineering, Chemical
Xiaoxiao Li, Xiang'an Yue, Jirui Zou, Rongjie Yan
Summary: This study proposes a novel method for evaluating emulsion generation and stability in oil-water systems and designs a new instrument for visualizing emulsion presence and separation. Quantitative methods accurately assess emulsification capability and emulsion stability, and distinguish differences between different oil-water samples. These parameters are of great significance for enhancing oil recovery.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Peyman Koreh, Mostafa Lashkarbolooki, Majid Peyravi, Mohsen Jahanshahi
Summary: This study investigated the performance of different types of surfactants on the surface activity, emulsion size, and surface charge of five oil samples. The effects of various parameters on the interfacial tension of crude oil/surfactant solutions were comprehensively analyzed. The results showed that the properties of the surfactants, crude oil type, and ionic strength influenced the interfacial tension, surface charge, and microemulsion size, but not in a straightforward manner. Among the surfactants considered, the cationic surfactant showed the lowest dependency on the crude oil type, while the non-ionic surfactant showed the highest dependency. CTAB cationic surfactant exhibited the most efficient performance with a microemulsion size of 102 nm and surface charge near the isoelectric point.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Tahany Mahmoud, Nadia A. Samak, M. M. Abdelhamid, A. A. Aboulrous, Jianmin Xing
Summary: The study focused on enhancing biosurfactant production using bacteria isolated from Egyptian crude oils, showing promising results in improving surfactin and trehalose productivity by optimizing carbon sources and cultivation strategies. The properties and effectiveness of the produced biosurfactants were demonstrated through various tests, indicating their potential for enhanced oil recovery.
Article
Energy & Fuels
Caiua Araujo Alves, Jose Francisco Romero Yanes, Filipe Xavier Feitosa, Hosiberto Batista de Sant'Ana
Summary: This study compares the effects of asphaltene stability from two different crude oil samples on water-model oil interfacial tension and emulsion stability. The size of molecules in the feedstock has a predominant effect on reducing interfacial tension, while larger molecules are responsible for emulsion stability.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Ahmed F. Ibrahim, Khaled Z. Abdelgawad, Amer Al-Anazi, Jafar S. Al Hamad
Summary: Carbon dioxide (CO2) injection is an effective method for improving oil recovery in hydrocarbon reservoirs. The interfacial tension (IFT) between CO2 and crude oil is a critical parameter, and this study investigates the effects of temperature and crude composition on the minimum miscibility pressure and first-contact miscibility pressure by measuring the IFT values. The results show that temperature has a significant impact on the minimum miscibility pressure, while crude composition has a greater influence on the first-contact miscibility pressure. Correlating the IFT values with crude oil density and acid number provides a simple and cost-effective approach to understand the impact of crude oil composition on IFT under pressure. This research will enhance the simulation of CO2 EOR projects under reservoir conditions.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Xu Jiang, Ming Liu, Xingxun Li, Li Wang, Shuang Liang, Xuqiang Guo
Summary: This study investigated the impacts of Span 80 surfactant and hydrophobic SiO2 nanoparticles on the crude oil-water interfacial characteristics. It was found that the presence of nanoparticles led to higher crude oil-water interfacial tensions, especially at low surfactant concentrations. The effect of nanoparticle concentration was less significant at high surfactant concentrations.
Article
Energy & Fuels
Yingwei Si, Yangwen Zhu, Tao Liu, Xinru Xu, Jingyi Yang
Summary: In this study, a boron-containing anionic-nonionic surfactant (SYW) was synthesized and used for emulsification viscosity reduction research on Xinjiang heavy oil. SYW showed a viscosity reduction rate of 97.3%. By compounding SYW with oleic acid and ethanolamine, the resulting surfactant SYG further improved the viscosity reduction rate to 98.6%. Both SYW and SYG significantly reduced interfacial tension and improved the dispersion of the emulsion.
Article
Energy & Fuels
Pattamas Rattanaudom, Bor-Jier Ben Shiau, Jeffrey Harry Harwell, Uthaiporn Suriyapraphadilok, Ampira Charoensaeng
Summary: The study successfully prepared silica nanoparticle (SNP) added ultralow interfacial tension foam (SNP-ULIFT foam) using ternary surfactant systems. The foam exhibited remarkable ability to form foam and ultralow interfacial tension, leading to significant improvement in oil recovery performance in core flood experiments.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Biswadeep Pal, Rahul Kumar, Tarun Kumar Naiya
Summary: The study shows that DEMLOCS demulsifier formulated with coconut extract performs well in separating oil and water, with the ability to effectively degrade emulsions in an environmentally friendly manner. The addition of DEMLOCS can reduce the viscosity of emulsions, facilitate water separation, and does not pose harm to the environment or refining systems.
PETROLEUM SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Xiaoxiao Li, Xiang'an Yue, Zhen Wang, Rongjie Yan, Yabing Guo
Summary: The study revealed that increasing flow rate can facilitate oil film detachment, but the effectiveness is limited by the action area and displacement efficiency. Different surfactants with varying interfacial tensions and emulsification behaviors were found to promote the dislodging of the oil film.
Article
Chemistry, Physical
Hao Ma, Shuqian Xia, Ning Li, Tongyu Wang, Wangang Zheng, Tiantian Yu, Qinglin Shu, You Han
Summary: This study synthesized two types of polymers and compounded them with surfactant to reduce the viscosity of heavy crude oil. The results showed that the surfactant-polymer composite system had advantages in emulsifying stability, with a water segregation rate of 60.6% and a viscosity reduction rate of more than 92.1% after optimization. The electrostatic interaction played a major role in the emulsion systems, and the presence of divalent cations affected the conformation of the water-soluble polymer. The variations in interaction energy in salt solutions led to experimental and simulated differences, ultimately determining the emulsifying properties of heavy crude oil. This research provides insights into the interactions and influences of complex mixtures in oil-water systems and facilitates the design and application of innovative chemical additives in heavy crude oil extraction and transportation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Limin Xu, Ming Han, Dongqing Cao, Jinxun Wang
Summary: This study explores the impact of dynamic IFT on emulsification capacity and oil production improvement, finding that quick initial IFT reduction is crucial for oil mobilization. Comparing surfactants with different initial values, it is shown that systems with lower initial IFT achieve significantly higher incremental oil production.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Muhammad Irfan, Javed Akbar Khan, Hussain H. Al-Kayiem, Sharjeel Waqas, Waqas Aleem, Nor Erniza Mohammad Rozali, Sabih Qamar, Abdulnour Ali Jazem Ghanim, Dobrochna Ginter-Kramarczyk, Stanislaw Legutko, Izabela Kruszelnicka, Saifur Rahman
Summary: Water separation is a significant issue in production facilities due to the use of chemical enhanced oil recovery methods that suppress oil/water separation with stable emulsions. This study assessed the impact of different emulsifiers on enhanced oil recovery and used laser scattering to measure emulsion stability. The findings showed that increasing surfactant concentration stabilizes the emulsion, while increasing alkali and polymer concentrations destabilize it. The study also focused on carbon number distribution, wax appearance temperature, and wax content in crude oil samples from different field locations, revealing a correlation between high carbon distribution and wax content.
Article
Chemistry, Multidisciplinary
Hossein Dartoomi, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: Researchers are exploring new, clean, and accessible sources of energy, and water salinity shows promise as a renewable energy source. The study focuses on NRED systems and their efficiency in converting saline water into electricity. By altering the nanochannel coating and employing different geometries, significant improvements in energy conversion efficiency and power output can be achieved.
Review
Biophysics
Vahid Kordzadeh-Kermani, Masoud Madadelahi, Seyed Nezameddin Ashrafizadeh, Lawrence Kulinsky, Sergio O. Martinez-Chapa, Marc J. Madou
Summary: This review introduces the on-board power supply and electrokinetic applications of electrified-LOD (eLOD) devices. By utilizing electrokinetic phenomena, different microfluids can be propelled, separated, and manipulated. While extensive research exists on stationary platforms, the applications on rotating platforms are still underdeveloped.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Engineering, Chemical
Zahra Seifollahi, Seyed Nezameddin Ashrafizadeh
Summary: This study numerically investigates the electroosmotic flow and ion transport in a conical nanochannel coated with a polyelectrolyte layer. Different types of charge density distribution functions are considered, and it is found that the soft step function enhances ion selectivity. The results demonstrate that considering the soft step function can significantly improve the rectification factor of the conical nanochannel.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Electrochemistry
Hossein Dartoomi, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: Energy production is a pressing issue, and scholars are focusing on finding alternative sources. This study explores the effect of nanochannel shape on ion transfer behavior and investigates the impact of different geometries, soft layer density, and concentration ratio on energy production. The results show that the best geometries for different factors vary, and increasing the soft layer's charge density can significantly boost power production.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Hamed Tavakkoli, Mohammad Reza Aboutalebi, Seyed Hosein Seyedein, Seyed Nezameddin Ashrafizadeh
Summary: The synergistic extraction of samarium and lutetium using D2EHPA and PC88A extractants was studied. It was found that the type of acidic solution played a more significant role in the extraction of samarium compared to lutetium. The optimum ratio of extractants for lutetium extraction was determined to be 0.01 mol center dot dm(-3) of D2EHPA and 0.04 mol center dot dm(-3) of PC88A.
JOURNAL OF SOLUTION CHEMISTRY
(2022)
Article
Chemistry, Analytical
Hossein Dartoomi, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: This study examines the influence of the presence of a soft, layer-by-layer (LBL) coating in charged nanochannels on ion transport parameters. The effects of pH, soft layer charge density, bulk concentration, and hard surface charge density on ionic current rectification and selectivity are determined using modeling. The results present a promising hybrid architecture for enhanced rectification.
ANALYTICAL CHEMISTRY
(2022)
Article
Mechanics
Mohammad Karimzadeh, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: This article numerically investigates the influence of channel geometry on the ionic selectivity and ionic current rectification of soft nanochannels. It shows that the rectification behavior of soft nanochannels can be significantly improved by using denser polyelectrolyte layers, especially at low and moderate salt concentrations.
Review
Chemistry, Multidisciplinary
Rahman Izadi, Mostafa Mahinroosta, Kazem Mohammadzadeh, Seyed Nezameddin Ashrafizadeh
Summary: Inorganic gels, as an important group of nanostructured materials, have a wide range of applications. These gels, in the form of solid colloids, are three-dimensional hydrophilic networks with cross-linked bonds made up of inorganic macromolecules. The different types of inorganic gels include xerogels, aerogels, and cryogels. This article comprehensively discusses the various aspects of inorganic gels, including their classification, synthesis methods (such as sol-gel, thermal processes, non-aqueous sol-gel, and precipitation), hybrid gels, and different applications.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Vahid Kordzadeh-Kermani, Hossein Dartoomi, Mina Azizi, Seyed Nezameddin Ashrafizadeh, Masoud Madadelahi
Summary: The performance of leaf-shaped obstacles as the oscillatory part of acoustic micromixers in a Y-junction microchannel was investigated. The influence of different leaf-shaped oscillatory obstacles on the mixing performance of two fluid streams was evaluated through numerical simulations, showing that increasing the number and length of lobes can enhance mixing efficiency. The effects of inlet velocity, frequency, and intensity of acoustic waves on mixing efficiency, as well as the occurrence of a bimolecular reaction at different reaction rates in the microchannel, were also studied.
Article
Electrochemistry
Amin Alinezhad, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: This article examines the use of nanofluidic membranes containing straight nanopores as nanotransistors, focusing on the PNP nanotransistor with its three regions representing the emitter, base, and collector. Applying voltage to the base region increases the current flowing between the emitter and collector regions. The study investigates the effect of electrolyte concentrations on the PNP nanotransistor's performance and suggests that adjusting these concentrations can enhance the device's functionality and open up new opportunities for nanoscale electronics.
ELECTROCHIMICA ACTA
(2023)
Article
Environmental Sciences
F. Raji, M. Zafari, A. Rahbar-Kelishami, S. N. Ashrafizadeh
Summary: Anion exchange membranes based on polyvinylchloride matrix were used as adsorbents for the adsorption of methyl orange. The membrane surface was modified to enhance the adsorption performance. The effects of solution pH, contact time, initial dye concentration, and adsorbent dosage were studied. The modified adsorbent showed higher adsorption capacity and proved to be a potential approach for industrial dye removal.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mahdi Khatibi, Hossein Dartoomi, Seyed Nezameddin Ashrafizadeh
Summary: Access to and use of energy resources are crucial for modern human existence. Traditional energy sources pose challenges, leading to a need for new and environmentally friendly alternatives. Reverse electrodialysis utilizing the salinity gradient can be a viable choice for energy generation. Understanding the mechanisms at the nanoscale is important for developing and disseminating this technology.
Article
Mechanics
Amirhossein Heydari, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: This study investigates a hybrid nanochannel with a soft layer exhibiting different spatial distribution functions. The research focuses on modifying behavior and enhancing performance in nanochannels inspired by nature. The findings contribute to the development of effective strategies for controlling and manipulating the behavior of charged nanochannels.
Article
Engineering, Chemical
Ahmad Aminnia, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: Water purification has received a lot of attention from researchers due to the worldwide problem of fresh water supply. This study focuses on enhancing membrane performance for water treatment by examining a nanochannel embedded in a nanofluidic membrane. By applying an electric field and inducing electroosmotic flow, the researchers found that increasing the charge density of the soft layer and lowering the electrolyte concentration can reduce fouling in the nanochannel. Using an AC field at intermediate frequencies was more successful in reducing fouling compared to a DC field.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Amirhossein Heydari, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: This research explores the ion transport behavior and functionality of a hybrid nanochannel consisting of two conical and cylindrical parts. The study investigates various properties such as electroosmotic flow, ionic current, rectification, and selectivity, and analyzes the effects of different factors on these properties. The findings reveal the influences of the length of each part in the nanochannel on rectification, selectivity, and conductivity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
