Article
Chemistry, Multidisciplinary
Diego F. Muriel, Joseph Katz
Summary: This study investigates how the properties of crude oil and dispersant concentration impact the viscosity, viscoelastic properties, and microstructure of salt water-in-crude oil emulsions. Microscopy combined with machine learning analysis is used to determine the size and spatial distribution of seawater droplets. The findings reveal that the size and distance between droplets decrease as viscosity increases, with smaller droplets clustering around larger ones. The emulsions exhibit non-Newtonian behavior, with viscosity decreasing as shear rate increases.
Article
Materials Science, Paper & Wood
Liwei Shen, Tianqi Liu, Kecang Huang, Dalei Zhang, Xincai Luo, Ying Yang, Xuening Feng, Zejun Zhang, Fan Ye, Yuanzhu Mi
Summary: A RH-NH2 demulsifier was prepared for the separation of stable oil-in-water emulsions. The demulsifier showed high efficiency in removing oil from the emulsion, and can potentially be used in industrial applications due to its low cost.
Article
Energy & Fuels
Ahmad A. Adewunmi, Muhammad Shahzad Kamal, Sunday O. Olatunji
Summary: An SVR-based model was proposed in this study to predict the performance of ionic liquid demulsifiers in water/oil separation. The model demonstrated high accuracy and can be used for smart screening of ionic liquids to enhance demulsification efficiency in industries such as petroleum.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Acoustics
Ali Sadatshojaie, David A. Wood, Seyyed Mohammad Jokar, Mohammad Reza Rahimpour
Summary: The study evaluated the performance of ultrasonic fields in demulsifying crude oil emulsions using horn-type piezoelectric ultrasonic transducers with a frequency of 20 kHz. The experiments demonstrated that increasing the intensity of ultrasonic fields improves the efficiency of water segregation from crude oil, while irradiation time and initial water content also affect the separation rate.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Xue Xia, Zhiqi Zhao, Wei Cai, Chuanxian Li, Fei Yang, Bo Yao, Guangyu Sun
Summary: The content of paraffin waxes affects the stability of W/O emulsions. Increasing the paraffin content improves emulsion stability but weakens the stability of asphaltene. Test temperature also has a significant impact on emulsion stability. Increasing the paraffin content at 30℃ benefits emulsion stability, while increasing the paraffin content at 15℃ helps to form a stronger wax crystal network structure and improve emulsion stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Soroush Ahmadi, Azizollah Khormali, Fridel Meerovich Khoutoriansky
Summary: This study investigates the effect of oil to kerosene ratio, space velocity, temperature, demulsifier dosage, and wash water ratio on the performance of demulsification of water-in-heavy crude oil emulsions. The results show that the oil to kerosene ratio has the greatest impact on water removal efficiency (WRE) and salt removal efficiency (SRE).
Review
Energy & Fuels
Saidulla Faizullayev, Akbota Adilbekova, Wojciech Kujawski, Mojtaba Mirzaeian
Summary: The oil industry is facing the issue of crude oil emulsions formation, requiring the research and development of more environmentally friendly and cost-efficient demulsifiers and methods.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Mohammadjavad Fazeli, Mehdi Escrochi, Zohreh Sadat Hosseini, Behzad Vaferi
Summary: Asphaltene often causes issues in crude oil transportation and processing equipment. This research investigates the impact of angular frequency and n-heptane concentration on asphaltene precipitation and rheological behavior. The results suggest that optimizing the angular frequency and n-heptane concentration can reduce asphaltene content and viscosity.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Yujiang Li, Chuanxian Li, Zhiqi Zhao, Wei Cai, Xue Xia, Bo Yao, Guangyu Sun, Fei Yang
Summary: This study investigates the effects of test temperature and asphaltene concentration on the stability of water-in-waxy crude oil emulsions. The results indicate that dissolved-state wax facilitates the adsorption of asphaltenes and enhances the interfacial properties, while wax crystals form a network structure and immobilize water droplets, thus improving the stability of the emulsions.
Article
Engineering, Chemical
Kazim Nadirov, Manap Zhantasov, Zhanna Nadirova, Nurlybek Otarbaev, Gulmira Bimbetova, Rashid Nadirov
Summary: Saline water in crude oil forms stable water-in-oil emulsions, which can be broken and separated by adding special materials. This study found that freshly milled quartz particles can reduce emulsion stability and increase water adhesion, leading to improved demulsification.
Article
Energy & Fuels
Abdelrahman O. Ezzat, Ayman M. Atta, Hamad A. Al-Lohedan
Summary: Novel multifunctional tricationic pyridinium ionic liquids were synthesized and investigated for their potential application as demulsifiers for heavy crude oil emulsions, showing promising prospects in the petroleum industry.
Article
Chemistry, Physical
Ming Lei, Hua Huang, Junliang Liu, Feng Peng
Summary: In this study, a gemini ionic liquid called PGE-TFA was prepared and found to have excellent demulsification properties for crude oil emulsions, even at a lower temperature of 40 degrees C. It exhibited higher efficiency and faster rate of demulsification compared to commercial demulsifiers, and could be used in a wide range of conditions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Huy-Hong-Quan Dinh, Enric Santanach-Carreras, Veronique Schmitt, Francois Lequeux, Pascal Panizza
Summary: The study investigates the role of adding a water-soluble surfactant as a demulsifier in stabilizing water-in-dodecane emulsions. The formation of a dense packed layer significantly slows down water separation, leading to an increased water separation efficiency. The efficiency of demulsifiers in breaking W/O emulsions is strongly correlated to their adsorption strength at the W/O interface, providing valuable insights for chemical demulsifier selection.
Review
Engineering, Chemical
Oluwaseun Ruth Alara, Nour Hamid Abdurahman, Moses Oludayo Tade, Hassan Alsaggaf Ali, Kehinde Temitope Alao
Summary: Effectively breaking emulsions in the petroleum industry is crucial for minimizing environmental issues and ensuring smooth operation of transportation, refining, and treatment facilities. Previous and current studies have demonstrated that combining different separation modes and demulsification modeling can enhance the efficiency of emulsion breaking.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Abdelrahman O. Ezzat, Hamad A. Al-Lohedan, Ayman M. Atta
Summary: This study focuses on the preparation of new green oilfield chemicals based on ionic liquids with enhanced demulsification efficiency. Through modifications of the chemical structure, a new amphiphilic molecule was synthesized, showing promising demulsification performance at low doses and temperatures.