Review
Energy & Fuels
Syed Imran Ali, Zahoor Awan, Shaine Mohammadali Lalji
Summary: Asphaltene precipitation and deposition is a major flow assurance issue in the oil industry, and chemical treatment is the most common and preferred method to address it due to its flexibility in chemical recipes, applicability in challenging locations, and high efficiency. Proper screening of chemicals through various experimental techniques is essential for successful chemical treatment.
Article
Engineering, Petroleum
Mukhtar Elturki, Abdulmohsin Imqam
Summary: Gas-enhanced oil recovery by nitrogen injection is efficient but may cause asphaltene deposition. This research focused on nitrogen impact on asphaltene precipitation in nanopores, leading to pore plugging and reduced oil recovery. Increasing nitrogen injection pressure and longer mixing time resulted in higher asphaltene content, causing significant pore plugging.
Article
Energy & Fuels
Shayan Enayat, Muhieddine A. Safa, Mohammad Tavakkoli, Humberto Valdes, Abeer M. Rashed, Ebtisam F. Ghloum, Ridha Gharbi, Sriram Santhanagopalan, Francisco M. Vargas
Summary: This study evaluated the performance of commercial asphaltene inhibitors and proposed a novel nanoparticle-based formulation to reduce asphaltene deposition. The optimal formulation reduced asphaltene deposition on carbon steel by 90% compared to a blank experiment. Therefore, shifting from dispersion analysis to actual asphaltene deposition tests is a more effective way to screen chemicals.
Article
Energy & Fuels
Marc Cassiede, Aurora Mejia, Sadia Radji, Herve Carrier, Jean-Luc Daridon, Mohamed Saidoun, Frederic Tort
Summary: The study investigated the effectiveness of a modified alkylphenol resin in reducing asphaltene deposition on metal surfaces under various temperature and pressure conditions using an immersed quartz crystal resonator. The results show that the presence of the resin can reduce the asphaltene deposition rate and modify the viscoelastic properties of the asphaltene solution.
Article
Chemistry, Physical
Fatemeh Mahmoudi Alemi, Seyed Ali Mousavi Dehghani, Alimorad Rashidi, Negahdar Hosseinpour, Saber Mohammadi
Summary: Synthesized single-walled carbon nanotubes (SWCNTs) effectively delay asphaltene precipitation and reduce the size distribution of asphaltene aggregates. The highest dispersion efficiency value of 93.5% is achieved at a concentration of 100 ppm. The large surface area of SWCNTs and strong pi-pi interactions with asphaltenes contribute to their efficient control of asphaltene precipitation/aggregation.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Ronald Nguele, Hikaru Hirota, Yuichi Sugai, Kyuro Sasaki
Summary: The study indicates that the use of polymer-based nanofluid can effectively reduce asphaltene adsorption in CO2 oil recovery, with nanofluid exhibiting superior interfacial tension reduction compared to water, and can reduce asphaltene adsorption by providing steric hindrance.
Article
Energy & Fuels
Shirin Baghersaei, Babak Mokhtari, Bahram Soltani Soulgani, Nahid Pourreza, Sepideh Veiskarami
Summary: Asphaltene destabilization is a major issue in the petroleum industry, but it can be controlled using chemical compounds such as ionic liquids. In this study, three ionic liquids were synthesized and used as asphaltene dispersants. It was found that tetrabutylammonium cinnamate and tetrabutylammonium oleate were more efficient in dispersing asphaltene aggregates compared to tetrabutylammonium stearate. The results showed that the presence of carbon-carbon K bonds and higher net negative charge of the anion contribute to the stabilization of asphaltene aggregates.
Article
Engineering, Chemical
Ali Ghamartale, Sohrab Zendehboudi, Mohamad Mohamadi-Baghmolaei
Summary: This study utilized molecular dynamics simulation to investigate asphaltene deposition on a calcite surface with chemical inhibitors. The results showed that n-octylphenol reduced asphaltene aggregation through hydrogen bonding, while 1-butyl-3-methylimidazolium chloride could mitigate face-to-face aggregation of asphaltene. The combination of inhibitors demonstrated improved efficiency in reducing deposition and aggregation compared to using a single inhibitor.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Harvey W. Yarranton, Francisco Ramos-Pallares
Summary: Asphaltenes, the least soluble fraction of crude oil, can phase separate from the oil with changes in temperature, pressure, or composition. A phase behaviour model that can predict asphaltene precipitation onset and amount is desired for design and operation of processes. The regular solution modelling approach, based on activity coefficients, is suitable for liquid-liquid phase separations such as asphaltene precipitation in heavy oil mixtures. New updates and future applications of this approach are discussed with highlighted strengths and limitations for oilfield applications.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Yunshi Huang, Yunfeng Liang, Yoshihiro Masuda, Wuge Cui, Takeshi Tsuji, Toshifumi Matsuoka, Edo S. Boek, Katsumo Takabayashi
Summary: The solubility parameters of asphaltenes were calculated using molecular dynamics simulations, and a new method for calculating asphaltene Hansen solubility parameters was proposed and implemented. Hansen solubility sphere diagrams were drawn to estimate the solubility of asphaltenes in solvents, and the Flory-Huggins thermodynamic model was utilized. An optimal toluene-IPA mixing solvent concentration ratio was found for asphaltenes of the target oilfield.
Article
Mathematics
Aleksey I. Shinkevich, Nadezhda Yu. Psareva, Tatyana V. Malysheva
Summary: The article presents a methodology for solving the multicriteria problem of choosing industrial zones for the development of chemical industries. The methodology uses an additive global criterion and includes multi-criteria selection, data scaling, convolution of criteria, and statistical analysis. The chosen industrial zones in the Russian region demonstrate above-average environmental sustainability but are affected by adjacent environmentally unfavorable industries. The article suggests that the proposed methodology can be applied in developing intelligent systems for monitoring and controlling the development of chemical industries while considering environmental safety.
Article
Energy & Fuels
Seyed Mohammad-Amin Hosseini-Moghadam, Ali Zahedi-Nejad, Masoud Bahrami, Mohammad Torkaman, Mohammad-Ali Ghayyem
Summary: DBSA was found to be the most effective inhibitor in reducing asphaltene aggregates size at different temperatures, while SA increased aggregate size at high temperatures. The collision efficiency was influenced by both efficient inhibitors and temperature reduction, with a size-dependent collision efficiency halving the model error on average compared to a size-independent one.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Ali Sanati, M. Reza Malayeri
Summary: This study demonstrates the potential of using environmentally-friendly chemicals, a hydrophobic deep eutectic solvent (DES) and a glycolipid biosurfactant known as rhamnolipid (RL), as asphaltene precipitation inhibitors. Experimental results confirm that these green chemicals interact with asphaltenes and alter their structure. Additionally, theoretical analysis based on the extended DLVO theory suggests that acid-base interactions play a key role in retarding asphaltene precipitation.
Article
Optics
Juechen Ni, Xiao Shu, Jianzhao Liu, Jing Zhi Sun
Summary: We report the synthesis and investigation of a piperazine-modified tetraphenylethene (TPE-Pz) with multi-functional properties. After acidification, the cationic TPE-Pz(+) molecules can form stable suspensions in tetrahydrofuran/water mixture solutions and exhibit aggregation-induced emission. The suspension can be used as a fluorescent probe for the detection of hazardous chemicals, such as aldehydes and picric acid. The piperazine group in TPE-Pz allows for high specificity for lysosome with low cytotoxicity and high contrast compared to LysoTracker Red.
JOURNAL OF LUMINESCENCE
(2022)
Article
Physics, Applied
Ananya Renuka Balakrishna, Richard D. James
Summary: The study reveals that the reduction in hysteresis of Permalloy is related to specific values of magnetostriction and anisotropy constants, which are balanced at the particular composition Fe21.5Ni78.5, resulting in a significant decrease in hysteresis.
APPLIED PHYSICS LETTERS
(2021)
