Article
Materials Science, Multidisciplinary
Sandeep Rellegadla, Shikha Jain, Jitendra S. Sangwai, Meeta Lavania, Banwari Lal, Lisa Gieg, Aruliah Rajasekar, Achinta Bera, Akhil Agrawal
Summary: This study successfully altered the surface wettability by preparing VAG solution, which effectively enhanced the EOR potential.
ACS APPLIED POLYMER MATERIALS
(2021)
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
Engineering, Chemical
Huiyu Wang, Bei Wei, Zezheng Sun, Qingjun Du, Jian Hou
Summary: This study used a microfluidic chip to investigate the flow behavior of heavy oil droplets under different conditions, finding that the shape of the emulsion droplet is related to surfactant flow rate, thickness, and viscosity of heavy oil. In water flooding conditions, heavy oil droplets advance slowly along the solid surface, while they could be emulsified into tadpole-shaped droplets by surfactant.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Han Zhao, Wanli Kang, Hongbin Yang, Zitong Huang, Bobo Zhou
Summary: The study showed that the combination system of amphiphilic polymer and surfactant exhibited better emulsifying ability and emulsion stability compared to using either component alone. The improvement was attributed to the low interfacial tension generated by the addition of surfactant, as well as higher external viscosity and stronger interfacial film strength in the emulsion formed by the combination system. These factors collectively slowed down emulsion droplet migration velocity and prevented droplet coalescence, ultimately increasing emulsion stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biophysics
Fangxiang Hu, Yuyue Liu, Junzhang Lin, Weidong Wang, Dinghua Yu, Shuang Li
Summary: The study revealed that acetoin significantly influenced the conformational change and interfacial assembly of surfactin, leading to decreased cleaning efficiency and altered stability and wettability properties.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Energy & Fuels
Mingchen Ding, Ping Liu, Yefei Wang, Zhenyu Zhang, Jiangyang Dong, Yingying Duan
Summary: This research compares the performance of two fine-emulsification systems and one conventional ultra-low interfacial tension (IFT) system in heavy oil recovery. The results show that fine-emulsification systems can generate more stable emulsions and achieve higher oil recovery rates compared to the ultra-low IFT system in certain conditions. However, the difference between the two systems becomes less significant as the water-oil viscosity ratio increases.
Article
Energy & Fuels
Rohan M. Jadhav, Ganesh Kumar, N. Balasubramanian, Jitendra S. Sangwai
Summary: This study investigates the synergistic effect of nickel nanoparticles and solvent tetralin on the rheological properties and composition of extra-heavy crude oil, revealing that the addition of 0.2 wt% nickel nanoparticles can significantly reduce the viscosity of oil. Aquathermal upgrading of EHO was conducted with nanoparticles, confirming the catalytic properties of nickel nanoparticles in upgrading EHO through tests such as FT-IR, GC-MS, and SARA characterization. Additionally, a new mechanism describing the dynamics of nickel nanoparticles in contact with asphaltene clusters has been proposed for better understanding.
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
Chemistry, Physical
Zhenyu Zhang, Yefei Wang, Mingchen Ding, Dihao Mao, Mifa Chen, Yugui Han, Yigang Liu, Xinfang Xue
Summary: The role and contribution of different mechanisms to heavy oil recovery through combination flooding, such as viscosification, ultralow interface tension (IFT) and emulsification, are still unclear. In this study, emulsified and ultra-low IFT mixtures were compared in terms of IFT, emulsion stability, and oil recovery performance. Results showed that while the ultra-low IFT mixture had a very low IFT, its emulsion stability was poor, whereas the emulsified mixtures were more effective in stabilizing heavy oil emulsion. The contribution of emulsification was found to be higher when the viscosity ratio was lower than 0.2, but decreased as the viscosity ratio increased.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
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
Hamid Daneshmand, Masoud Rezaeinasab, Masoud Asgary, Meysam Karimi
Summary: Wettability alteration from oil-wet to water-wet on rock surfaces is important for Enhanced Oil Recovery (EOR), where nanoparticles, especially polymer-grafted nanoparticles, show promising results in improving oil recovery. The challenges in applying nanoparticles for EOR lie in the colloidal stability of nanofluids in harsh reservoir conditions. Modified silica nanoparticles with hydrophobic agent trimethoxy (propyl) silane and mixed polyethylene glycol methyl ether have shown effective retention and wettability alteration properties, particularly in oil-wet substrates due to hydrophobic interaction.
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
Energy & Fuels
Anastasiya Y. Yadykova, Sergey O. Ilyin
Summary: This article studies and analyzes the morphological features, thermophysical properties, and rheology of bio-oil in comparison with light and heavy crude oils. The study demonstrates that bio-oil is a water-in-oil emulsion, light crude oil is a suspension of paraffin waxes in oil medium, and heavy crude oil is a homogeneous liquid. The article also explores the blends of bio-oil with fossil oils and their miscibility, showing that macroscopically compatible blends are formed only when heavy crude oil is mixed with bio-oil at a low content of the latter.
Article
Energy & Fuels
Edward Andrews, Ann Muggeridge, Alistair Jones, Samuel Krevor
Summary: Low salinity water flooding is a promising enhanced oil recovery technique, but it is currently difficult to predict which systems will respond favorably. This study provides insights into the role of pore geometry and topology on oil mobilization during low salinity water flooding.
Article
Engineering, Chemical
Sunil Kumar, Aseem Pandey, Milana Trifkovic, Steven L. Bryant
Summary: Developing a cost-effective and efficient system for continuous liquid-liquid emulsification and separation is a challenge in various industries. This study introduces a simple and scalable design strategy using porous beds made of inexpensive sand to achieve stable oil in water emulsions and complete demulsification by tuning sand properties. The industrial applicability of this system for heavy crude oil in water emulsion separation demonstrates its potential for industrial-scale use.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Rahul Saha, Ramgopal V. S. Uppaluri, Pankaj Tiwari
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2018)
Article
Chemistry, Physical
Rahul Saha, Ramgopal V. S. Uppaluri, Pankaj Tiwari
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2018)
Article
Energy & Fuels
Rahul Saha, Vaibhav V. Goud
BIOMASS CONVERSION AND BIOREFINERY
(2015)
Article
Energy & Fuels
Rahul Saha, Ramgopal V. S. Uppaluri, Pankaj Tiwari
Article
Energy & Fuels
Rahul Saha, Ranjan Phukan
Summary: This study investigates the adsorption behavior of a potentially identified non-ionic surfactant on reservoir rock surfaces. The adsorption is found to be affected by mineral composition and surface area, with the Langmuir isotherm model and pseudo-second-order kinetics providing the best fit for the data. Additionally, the use of hydrophilic nanoparticle-surfactant flooding shows promise in improving oil recovery mechanisms.
Article
Chemistry, Applied
Ranjan Phukan, Rahul Saha, Pritam Mazumdar
Summary: This study investigates the adsorption behaviors of surfactants in sandstone reservoir rocks with different amounts of carbonate cement/minerals and their impact on wettability alteration under low-salinity conditions. The results show that the mineralogy of sandstone reservoir rocks, especially carbonate minerals, affects the brine-rock interactions, including wettability alteration and surfactant adsorption. Low salinity surfactants can positively alter the wettability of both rock types to water-wet conditions, with the most favorable wettability alterations achieved with cationic surfactant solutions.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2023)
Article
Energy & Fuels
Rahul Saha, Aditi Sharma, Ramgopal V. S. Uppaluri, Pankaj Tiwari
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Rahul Saha, Ramgopal Uppaluri, Pankaj Tiwari
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Chemistry, Physical
Rahul Saha, Ramgopal V. S. Uppaluri, Pankaj Tiwari
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2017)
Article
Energy & Fuels
Swapan K. Achar, Swaroopa Rani Dasari, Rahul Saha, Vaibhav V. Goud
INTERNATIONAL ENERGY JOURNAL
(2014)
