Article
Chemistry, Physical
Javad Ebrahimi, Behnam Shahsavani, Mojtaba Ghaedi, M. Reza Malayeri, Masoud Riazi
Summary: This study presents a systematic screening approach to evaluate the efficacy of different inhibitors for two crude oils with high asphaltene content. Results show that DBSA is the most efficient inhibitor, but its applicability is limited in cases where both water production and asphaltene deposition occur simultaneously. Additionally, dispersant 110 demonstrates superior dispersion capabilities under low centrifugal force. Overall, dispersant 110 shows the most promising performance in different test methods.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Xue Xia, Chuanxian Li, Yujia Qi, Huimin Shi, Guangyu Sun, Bo Yao, Fei Yang, Yansong Zhao
Summary: It has been found that colloidal asphaltene and polymer pour point depressants (PPD) synergistically modify the rheology of model waxy oil. In the crude oil recovery process, the addition of amphiphilic asphaltene dispersant (AD) affects the synergistic effect of asphaltene and PPD. Several asphaltene dispersants were evaluated for their influence on the modification effect of ethylene-vinyl acetate (EVA) in this study. The results showed that AD deteriorates the synergistic modification function between EVA and asphaltene.
Article
Biochemistry & Molecular Biology
Ariff Mahtar, Aliyu Adebayo Sulaimon, Cecilia Devi Wilfred
Summary: This study aimed to synthesize novel lignosulfonate-based ionic liquids (ILs) for asphaltene dispersion. The synthesized ILs showed high thermal stability and dispersion indices. The results indicate that these ILs have great potential for the cost-effective refining process in the oil and gas sector.
Article
Energy & Fuels
Narges Bahaloo Horeh, Negahdar Hosseinpour, Alireza Bahramian
Summary: This study provides an asphaltene inhibitor (BZSS-012) and emphasizes the mutual dependence of the inhibitor-asphaltene molecular structure/functional groups for successful inhibition. Two dead oil samples were used to extract asphaltenes and prepare model oils, and interfacial rheology measurements and conventional asphaltene dispersant tests were performed to evaluate the inhibitor performance. It was found that the inhibitor achieved an efficiency of 99.2% in the F-model oil, higher than the 66.7% efficiency in the A-model oil. Monitoring the standard deviation of dynamic interfacial tension was considered as an appropriate method to screen asphaltene inhibitors.
Article
Chemistry, Physical
Ali Ghamartale, Sohrab Zendehboudi, Nima Rezaei, Ioannis Chatzis
Summary: Chemical inhibitors, such as surfactants, can improve the asphaltene stability in crude oil by disrupting the asphaltene aggregation intensity and aggregate characteristics. Molecular dynamics simulations show that increasing the concentration of chemical inhibitors can reduce the aggregation intensity of asphaltenes. The research also reveals that the addition of certain inhibitors can significantly affect the dispersity and shape of aggregates, especially for specific types of asphaltenes.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Gina M. Coelho, Ann G. Slaughter, Ruixue Liu, Michel C. Boufadel, Victoria Broje
Summary: The research aims to develop a new field kit, the Dispersibility Assessment Kit (DAK), to help spill response personnel assess the dispersibility of oil slicks under actual environmental conditions, aiming to improve the accuracy and efficiency of spill response decision-making.
MARINE POLLUTION BULLETIN
(2021)
Article
Energy & Fuels
Reza Salehi Nezhad, Amin Kiomarsiyan, Houman Darvish
Summary: In this study, the impacts of various effective parameters and inhibitors on asphaltene deposition rate were investigated. The abilities of SDS, Triton X-100, and salicylic acid in reducing asphaltene deposition were evaluated. The experiments showed that SDS performed better than salicylic acid and Triton X-100. Furthermore, the effect of SDS concentration on the rate of deposition was studied, revealing that an increase in SDS concentration decreased the rate of asphaltene deposition. This study can serve as a helpful tool for petroleum engineers dealing with asphaltene deposition problems.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Polymer Science
Xiaoyan Chen, Weizhi Huang, Bobing He, Yafeng Zhang
Summary: The article introduces a new type of modified tackifying dispersant PVA-AA-t, prepared by high-temperature solution polymerization method, with excellent thickening and dispersing properties.
Article
Energy & Fuels
Jia Meng, Somasekhara Goud Sontti, Mohsen Sadeghi, Gilmar F. Arends, Petr Nikrityuk, Xiaoli Tan, Xuehua Zhang
Summary: This study reveals the significance of asphaltene precipitation in the oil industry and investigates the effects of different solvents and inhibitors on the yield and size distribution of asphaltene particles.
Review
Biochemistry & Molecular Biology
Xiaotian Liu, Shan Wang, Ning Liu, Bo Wei, Tian An
Summary: This paper elucidates the evolution and types of dispersants, explains the mechanisms of how dispersants affect the performance of coal water slurry, and explores the challenges and emerging trends in the domain of dispersants.
Article
Chemistry, Multidisciplinary
Masatsugu Takada, Yutaka Okazaki, Haruo Kawamoto, Takashi Sagawa
Summary: Dry ball milling with excess additives such as l-tartaric acid greatly improves the solubility and dispersion of sulfuric acid lignin (SL) in N,N-dimethylformamide (DMF). The introduction of hydrophilic functional groups and decrease in molecular weight contribute to the dispersion of lignin in DMF. This method is applicable to various types of lignin and can potentially utilize unused lignin resources.
Article
Chemistry, Multidisciplinary
Natalia Borzdun, Artyom Glova, Sergey Larin, Sergey Lyulin
Summary: This study investigates the relationships between the chemical structure of asphaltenes and the morphology of P3HT/asphaltene blends for BHJ solar cells. Molecular dynamics simulations show that carboxyl-containing asphaltenes can lead to the formation of heterophase morphology and highly ordered stacks, with additional stabilizing factors like hydrogen bonding required in blends with conjugated polymers. Aliphatic side groups in asphaltenes can improve miscibility and prevent heterophase morphology. Maintaining a certain ratio of carboxyl-containing asphaltenes to P3HT is crucial for polymer chain folding and blend morphology.
Article
Energy & Fuels
Ivan Moncayo-Riascos, Christian Guerrero-Benavides, Juliana Giraldo, Oscar Ramirez-Jaramillo, Fernando A. Rojas-Ruiz, Jorge A. Orrego-Ruiz, Cristiam Cundar, Wilson A. Canas-Marin, Raul Osorio Gallego
Summary: A machine learning-based classification model and a linear regression model were proposed in this study to predict the risk of asphaltene damage and the asphaltene onset pressure. Through experimental evaluation and comparison, the accuracy and effectiveness of these models were demonstrated. The integrated model contributes to predicting and preventing the decline in oil production caused by asphaltene precipitation.
Article
Energy & Fuels
Aisha T. Khaleel, Caleb J. Sisco, Mohammad Tavakkoli, Francisco M. Vargas
Summary: Asphaltenes, a polydisperse fraction present in crude oil, play a crucial role in deposition processes. Experimental and modeling studies show that the polydispersity of asphaltenes affects the amount of deposition.
Article
Energy & Fuels
Paolo Guida, Eleonora Colombo, Elia Colleoni, Saumitra Saxena, Alessio Frassoldati, William L. Roberts, Tiziano Faravelli
Summary: This study introduces a predictive and generally applicative method for asphaltene pyrolysis modeling, showing good agreement with recent experimental data and providing a foundation for a more comprehensive project in the future.