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, Environmental
Paul D. Barrette
Summary: Frazil ice formation requires supercooled water and turbulence; laboratory generation of frazil ice necessitates a water containment, cooling method and turbulence source; different options are available for water containments, supercooling of the water column and equipment to induce turbulence.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
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
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
Energy & Fuels
Zhuqing Zhang, Alyssa Perrard, Siwar Trabelsi, Sibani Lisa Biswal
Summary: This study compared the efficiency of D-limonene with other solvent-based microemulsions for removing asphaltene deposits. The results showed that all tested microemulsions had higher removal efficiency than the control formulation, with the type and amount of solvent strongly influencing the rate and amount of removal. The most effective formulations followed a pseudosecond-order desorption kinetic model, supporting a mechanism where the microemulsions solubilize the asphaltene deposits.
Article
Geochemistry & Geophysics
Rong-tao Li, Xin-wei Liao, Jian-dong Zou, Chang-wang Gao, Dong-feng Zhao, Yuan-dong Zhang, Xing-ze Zhou
Summary: The study comprehensively investigated the mechanisms and adverse effects of asphaltene precipitation using experimental and numerical methods. Experimental results showed that asphaltene precipitation increases with pressure before reaching the minimum miscible pressure (MMP), peaks around the MMP, and then decreases slowly. The adverse effects on porosity and permeability resulted from asphaltene deposition were similar to the trend of asphaltene precipitation under the influence of pressure, asphaltene content, and temperature.
Article
Construction & Building Technology
Ali Zalghout, Samuel Castro, Jolina Karam, Kamil Kaloush
Summary: The use of Reclaimed Asphalt Pavement (RAP) in asphalt mixtures has gained attention, but there has been cautious progress in harsh hot climate areas. This study evaluated the performance of RAP mixtures using field produced Hot Mix Asphalt Mixtures (HMA) in the laboratory. The results showed that adding 15% and 25% RAP did not significantly affect stiffness, but improved rutting resistance, had comparable cracking performance, and acceptable moisture damage resistance. Based on the study's results, it is recommended to incorporate RAP as a sustainable paving activity.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Energy & Fuels
Syed Haider Abbas Rizvi, Anil Yadav, Jyoti Phirani, Vikram Singh
Summary: This study discusses the removal of asphaltene from inorganic silica surfaces using hydrodynamic forces. The results show that large aggregates of asphaltene can be removed from the surface with an increase in flow rates. The study also discusses the possible mechanism of asphaltene removal from the surface based on hydrodynamic force calculations.
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
Engineering, Chemical
Esau A. Hernandez, Carlos Lira-Galeana, Jorge Ancheyta
Summary: This study analyzes the performance of various models in predicting asphaltene precipitation and compares them with literature experimental data. The results show the need for further model development to cover a wider range of pressure, temperature, and composition conditions.
Article
Energy & Fuels
Hai Yuan, Azuo Nili, Jiale Chen, Haibo Ding, Han Liu, Yanjun Qiu
Summary: In this study, an improved reduced pressure column precipitation device was used to separate asphaltene subfractions in two types of road petroleum bitumen. The research showed that the solubility of asphaltene subfractions varied in different polar solvents, and as the polarity increased, the dispersion of asphaltenes decreased while hydrogen bonding and aromatic characteristics increased. These findings can explain the phase imbalance in bitumen caused by changes in asphaltene components.
Article
Environmental Sciences
Naruki Hiranuma, Brent W. Auvermann, Franco Belosi, Jack Bush, Kimberly M. Cory, Dimitrios G. Georgakopoulos, Kristina Hoehler, Yidi Hou, Larissa Lacher, Harald Saathoff, Gianni Santachiara, Xiaoli Shen, Isabelle Steinke, Romy Ullrich, Nsikanabasi S. Umo, Hemanth S. K. Vepuri, Franziska Vogel, Ottmar Moehler
Summary: This study investigated the abundance of ice-nucleating particles (INPs) from livestock facilities through laboratory experiments and field surveys. Results showed that livestock dust proxies had higher freezing efficiency than soil dust samples, and a high concentration of INPs was found in the air near livestock facilities during summer months.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Energy & Fuels
Priyanka Juyal, Shayan Enayat, Rebecca Lucente-Schultz, Qiwei Li, Mahtab Karimipour, Mohammad Tavakkoli, Tran-Bich Cao, Andrew Yen, Christopher Russell, Francisco M. Vargas
Summary: Asphaltene deposition is a growing concern in oil fields worldwide, and continuous injection of asphaltene inhibitors is a common strategy to mitigate this problem. The performance ranking of inhibitors depends on the type of test used, and there is still a need to develop a correlation between laboratory and field performance. This study investigates a commercial asphaltene inhibitor's performance in the laboratory and its behavior in a deepwater-oil well, with a focus on the effects of asphaltene polydispersity. The results aim to expand knowledge on this topic and provide best practices for testing the performance of asphaltene inhibitors in the laboratory.
Article
Chemistry, Medicinal
Ekneet K. Sahni, Jim A. Searles, Mark Nachtigall, Eric Owen, Dina Lyne
Summary: Vial breakage during lyophilization can be reduced by changing the lyophilization cycle and freezing temperature, as well as using special materials for vials. Small-scale strain gauge and breakage challenge studies are effective in minimizing vial breakage.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2023)
Article
Energy & Fuels
Zeinab Hosseini-Dastgerdi, Ashkan Maleki, Ebrahim Elyassi, Alimorad Rashidi
Summary: This study evaluates the potential application of silica-polyacrylamide nanocomposites in inhibiting asphaltene precipitation. The nanocomposites delay the onset of asphaltene precipitation and control the size of aggregates through adsorption. This research demonstrates the effectiveness of silica-polyacrylamide nanocomposites in handling asphaltene precipitation.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)