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)
Review
Energy & Fuels
Murray R. Gray, Harvey W. Yarranton, Martha L. Chacon-Patino, Ryan P. Rodgers, Brice Bouyssiere, Pierre Giusti
Summary: The molecules in petroleum asphaltenes form nanoaggregates in solution with debated size distribution, impacting phase behavior, physical properties, and processing of heavy petroleum fractions. The molecular weight ranges high with sizes below 100 nm, and large aggregates play a significant role in phase separation and emulsion stabilization. Average properties of asphaltene fraction can predict phase separation, gravity segregation, and other properties.
Article
Automation & Control Systems
Syed Imran Ali, Shaine Mohammadali Lalji, Zahoor Awan, Muhammad Qasim, Thamraa Alshahrani, Firoz Khan, Sami Ullah, Almas Ashraf
Summary: The main aim of this study is to predict asphaltene stability in crude oil as a function of its SARA values using machine learning algorithms. Four machine learning algorithms, Linear discriminant analysis (LDA), Linear regression (LR), decision tree (DT), and random forest (RF) were applied to predict the asphaltene stability of 95 crude oils. SARA values of these oil samples were taken as input parameters and visualized comprehensively using different plots. The overall accuracy of LDA was observed to be the highest and the Resins feature was found to be the most important parameter in predicting asphaltene stability.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2023)
Article
Energy & Fuels
Roque Guzman, Silvano Rodriguez, Pablo Torres-Mancera, Jorge Ancheyta
Summary: Appropriate prediction of asphaltene stability is crucial for anticipating operational problems in petroleum production, processing, transportation, and storage. This study evaluated the stability of crude oils using various methods and found discrepancies in the results, highlighting the importance of using multiple methodologies for accurate prediction.
Article
Energy & Fuels
Syed Imran Ali, Shaine Mohammadali Lalji, Javed Haneef, Usama Ahsan, Syed Mohammad Tariq, Syed Talha Tirmizi, Ramsha Shamim
Summary: The main goal of Petroleum Exploration and Production (E&P) companies is to achieve sustainable hydrocarbon production throughout the oil field life, but asphaltene precipitation and deposition pose a major challenge to this goal. Proper screening of asphaltene stability in crude oils can help predict stability accurately and plan preventive measures. Different dead and live oil screening techniques have their own limitations, risks, and advantages, and a detailed analysis and comparison can help in selecting the best technique for monitoring asphaltene stability in crude oils.
Article
Multidisciplinary Sciences
Arafat Husain, Ahmad A. A. Adewunmi, Afeez Gbadamosi, Mamdouh A. A. Al-Harthi, Shirish Patil, Muhammad Shahzad Kamal
Summary: Efficient demulsifiers with varying viscosities were evaluated for their demulsification potential on asphaltene stabilized crude oil emulsions. The demulsifiers showed better performance at ambient conditions in demulsifying emulsions formed from distilled water, while the higher viscosity demulsifier achieved a lower water removal. Seawater hastened demulsification. In the presence of salts, the demulsifiers demonstrated excellent demulsification and the performance varied depending on the type of salt. Injection of demulsifiers reduced the viscosity and shear stress of the emulsion, with the highest reduction observed in the lower viscosity demulsifier. A demulsification mechanism was proposed based on the analysis of optical microscopic images.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Tamim Mohammad Hasham, Burak Ay, Dogan Kaya, Emel Yildiz, Ahmet Ekicibil
Summary: New nanostructures of TiO2/VOx, TiO2/SiO2, and VOx/SiO2 were synthesized via hydrothermal methods and characterized. The X-ray diffraction results showed an increase in the anatase structure of each structure. The nanostructures exhibited weak ferromagnetic behavior with a coercive field, and their magnetic properties were found to be dependent on temperature and composite composition.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Mingxuan Li, Yupeng Tian, Chuangye Wang, Cuiyu Jiang, Chaohe Yang, Longli Zhang
Summary: This study investigated the effect of temperature on asphaltene precipitation during crude oil production. The results revealed that the solubility of asphaltene increased with temperature and smaller particle size led to higher dispersion rate. Different asphaltenes showed different sensitivity to temperature. The aggregate structure was found to be an important factor for asphaltene stability. X-ray diffraction and molecular dynamics simulation were used to support the findings.
Article
Multidisciplinary Sciences
Syed Imran Ali, Shaine Mohammadali Lalji, Muhammad Rizwan, Zahoor Awan, Saud Hashmi, Syed Danish Rasool
Summary: The flow properties of crude oil can be improved by increasing temperature or diluting the oil with lower molecular weight hydrocarbons. However, these operational changes often lead to asphaltene deposition problems. In this study, a two-level full factorial design was applied to investigate the effect of three experimental parameters on the yield of asphaltene weight percentage. The results showed that dilution ratio has a significant positive effect, while molecular weight of precipitant and temperature have a moderate negative effect on the response variable. The study provides a useful methodology for optimizing production parameters.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Mischelle P. Santos, Marcio L. L. Paredes, Eduardo R. A. Lima
Summary: This study investigated the onset of flocculation of asphaltenes and the effect of temperature on the destabilization of shale oil using optical microscopy. The results showed that the volume of larger particles increased after cooling, indicating an irreversible phenomenon. Theoretical analysis revealed that proper parameterization of the model could predict stability changes as a function of temperature. This research provides new insights into the microscopic interactions in asphaltene systems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Muhieddine A. Safa, Shayan Enayat, Abeer M. Rashed, Mohammad Tavakkoli, Ebtisam F. Ghloum, Ridha Gharbi, Sriram Santhanagopalan, Francisco M. Vargas
Summary: In this study, advanced technologies were used to investigate the stability of asphaltenes in different Kuwaiti oils, revealing that characteristics such as H/C ratios, aromaticity, and degree of condensation significantly affect asphaltene precipitation. Additionally, low molecular weight alkanes were found to have a higher tendency to precipitate a wider range of soluble asphaltenes in crude oil. The least stable asphaltenes exhibited the lowest asphaltene onset point detected by the indirect method.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
M. Daniela Contreras-Mateus, Francisco H. Sanchez, Diana M. Canas-Martinez, Nashaat N. Nassar, Arlex Chaves-Guerrero
Summary: This article investigates the adsorptive phenomena of nanomaterials and asphaltenes, focusing on magnetite nanoparticles/asphaltene systems and the effect of resins as stabilizing colloidal agents. The results show rapid asphaltene adsorption following the external mass transfer model and equilibrium adsorption described by the monolayer Langmuir model. The research also discovered that the adsorbed asphaltenes create a steric repulsive barrier between particles, reducing interaction intensity.
Article
Engineering, Chemical
Afshin Tatar, Ali Shafiei
Summary: By collecting 1439 data samples, machine learning models were developed as predictive tools to accurately predict asphaltene precipitation for a wide range of pressure and crude oil properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Syed Imran Ali, Shaine Mohammadali Lalji, Javed Haneef, Clifford Louis, Abdus Saboor, Nimra Yousaf
Summary: This research study compares the performance of different scaling equations and non-scaling models in modeling asphaltene precipitation, finding that all scaling equations are reasonably accurate in predicting asphaltene weight percentage. However, they are less accurate in predicting critical dilution ratio compared to non-scaling models.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Fatemeh Mahmoudi Alemi, Seyed Ali Mousavi Dehghani, Alimorad Rashidi, Negahdar Hosseinpour, Saber Mohammadi
Summary: The study showed that the synthesized MWCNT-Fe2O3 nanocomposite can effectively control the precipitation and aggregation of asphaltene, improving the stability and flow properties of crude oil.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Geosciences, Multidisciplinary
Mehdi Safari, Majid Mohammadi, Mehdi Sedighi
JOURNAL OF APPLIED GEOPHYSICS
(2017)
Article
Chemistry, Physical
Majid Mohammadi, Mitra Dadvar, Bahram Dabir
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2018)
Article
Energy & Fuels
Mehdi Sedighi, Majid Mohammadi, Mojtaba Sedighi, Mostafa Ghasemi
Article
Energy & Fuels
Mehdi Sedighi, Majid Mohammadi, Mojtaba Sedighi
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2018)
Article
Energy & Fuels
Majid Mohammadi, Mehdi Safari, Mostafa Ghasemi, Amin Daryasafar, Mehdi Sedighi
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Chemistry, Multidisciplinary
Mehdi Sedighi, Majid Mohammadi
JOURNAL OF CO2 UTILIZATION
(2020)
Article
Chemistry, Applied
Mostafa Ghasemi, Majid Mohammadi, Mehdi Sedighi
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Analytical
Ali Shamshiri, Vahid Alimohammadi, Mehdi Sedighi, Ehsan Jabbari, Majid Mohammadi
Summary: The present study aims to develop prediction models for the removal of nitrate and phosphate using modified clinoptilolite nanoparticles. Various solutions with different properties were used to treat the nanoparticles. The physicochemical properties of the nanoparticles were analyzed using several methods. Response surface methodology was employed to optimize the parameters for maximum removal. The results showed that the modified adsorbent with H2SO4 and NaCl solution had the best removal efficiency for nitrate and phosphate.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Majid Mohammadi, Mehdi Sedighi, Rajamohan Natarajan, Sedky Hassan Aly Hassan, Mostafa Ghasemi
Summary: In this study, oilfield produced water was treated in a microbial fuel cell (MFC) using response surface methodology and central composite design (RSM/CCD) to optimize the process. The effects of two parameters, SPEEK and nanocomposite (CNT/Pt), on COD removal and power generation were discussed, with XRD, SEM, TEM, and NMR used for analysis. Results showed that under optimized conditions of DS=80 and CNT/Pt of 14 wt% CNT- 86 wt% Pt, the MFC could remove 92% of COD and generate 545 mW/m(2) of power density.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Majid Mohammadi, Mehdi Sedighi, Mostafa Ghasemi
Summary: This study developed a method for removing nitrate and phosphate using silver/reduced graphene oxide nanocomposite as an adsorbent, optimizing factors such as initial pH, temperature, adsorbent dosage, and contaminant concentration for maximum removal. Under optimal conditions, simultaneous maximal removal of 88.97% nitrate and 91.48% phosphate was achieved.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Energy & Fuels
Zainb Y. Shnain, Alyaa K. Mageed, Hasan Sh Majdi, Majid Mohammadi, Adnan A. AbdulRazak, Mohammad F. Abid
Summary: Study has shown that the precipitation of asphaltenes could significantly influence well productivity during crude oil processing. This study investigates the use of TiO2-based nanofluid to stabilize crude oil flow. Gaussian Process Progression (GPR) with five kernel functions was used to analyze the relationship between the ratio of TiO2/SiO2 nanocomposite, the salinity of the nanofluid, pH, and the amount of organic solvent added to stabilize the crude oil flow. The models generated by GPR accurately represented the relationship.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Thermodynamics
Mostafa Baghsheikhi, Majid Mohammadi
Summary: The growth of the electronic government and the increase in the number of internet service providers has led to the development of data centers. A major equipment in these centers is the cooling system, which is responsible for the continuous exhaust of heat generated by the equipment. Optimizing the efficiency of these systems is of great importance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Economics
Mojtaba Sedighi, Majid Mohammadi, Saeed Farahani Fard, Mehdi Sedighi
Article
Nanoscience & Nanotechnology
Majid Mohammadi, Mehdi Sedighi, Vahid Alimohammadi
INTERNATIONAL JOURNAL OF NANO DIMENSION
(2019)
Article
Engineering, Multidisciplinary
Mehdi Sedighi, Saad A. Aljlil, Mohammed Druis Alsubei, Mostafa Ghasemi, Majid Mohammadi
ALEXANDRIA ENGINEERING JOURNAL
(2018)
Article
Chemistry, Physical
Rajalaxmi Sahoo, C. Reshma, D. S. Shankar Rao, C. V. Yelamaggad, S. Krishna Prasad
Summary: This study investigates the influence of the flexible spacer parity of a guest photoactive liquid crystalline dimer on the photonic bandgap features of the cholesteric and twist grain boundary smectic C phases of the host molecule. The results show that the parity of the photoactive dimer affects the width of the photonic bandgap and the blue-shift of the cholesteric phase. Additionally, the parity of the dimer also affects the layer spacing and two-dimensional periodicity of the liquid crystalline phases.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Sara Rozas, Alberto Gutierrez, Mert Atilhan, Alfredo Bol, Santiago Aparicio
Summary: This study presents a multiscale theoretical investigation on the use of bifunctional hydrophobic Deep Eutectic Solvent for carbon capture using tetrapropylammonium chloride, acetic acid, and ethanolamine. The characterization includes nanoscale analysis of CO2 absorption mechanisms and changes in liquid phase properties during gas capture.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Tabouli Eric Da-yang, Alhadji Malloum, Jean Jules Fifen, Mama Nsangou, Jeanet Conradie
Summary: In this study, the potential energy of different glycine tautomers and their interaction with Cu2+ cations was investigated. The results showed that the solvation medium and the presence of Cu2+ cations influenced the stability of glycine tautomers.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Xiaoliang Gou, Nan Ye, Qingqing Han, Junjie Cui, Long Yi Jin
Summary: In this study, amphiphilic rod-coil molecules with rigid DSA parts and flexible oligoether chains were designed and their assembly capacities were investigated. The morphology of the molecular aggregates was influenced by the pH of the solution and UV light, and the aggregates showed adsorption capacity for nitroaromatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Shuang Liu, Liyan Shan, Cong Qi, Wenhui Zhang, Guannan Li, Bei Wang, Wei Wei
Summary: Optimizing the design of styrene-butadiene-styrene copolymer (SBS) is crucial for producing cost-effective SBS modifiers and improving road quality. This study examined the influence of SBS content and molecular structure on viscosity and compatibility. The results showed that the viscosity contribution of SBS is determined by its molecular structure and phase morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Artem A. Petrov, Ekaterina A. Titova, Aydar A. Akhmadiyarov, Ilnaz T. Rakipov, Boris N. Solomonov
Summary: This work focuses on the thermochemistry of solvation of azeotropes. The enthalpies of dissolution of azeotropes in different mediums were determined, and the impact of the structure of the azeotropes on their properties in solution was discussed. A correlation between enthalpies of solvation and molar refraction was used to determine the vaporization enthalpies of azeotropes for the first time. The results were found to be consistent with literature data, obtained using direct and calculated methods. These findings contribute to the analysis of the structure-property relationships of azeotropes.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
L. V. Kamaeva, E. N. Tsiok, N. M. Chtchelkatchev
Summary: Understanding the correlations between liquids and solids allows us to predict the thermodynamic parameter range favorable for the formation of intriguing solid phases by studying liquids. In this study, we experimentally and theoretically investigated an Al-Cu-Co system within different composition ranges, and identified high-temperature solid phases. Our findings demonstrated the correlation between the boundaries of different solid phases and undercooling and viscosity in the concentration area.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
R. Aneesh Kumar, S. Jamelah Al-Otaibi, Y. Sheena Mary, Y. Shyma Mary, Nivedita Acharjee, Renjith Thomas, Renjith Raveendran Pillai, T. L. Leena
Summary: In this study, the interactions between doped and pristine coronenes and adenine nucleobases were investigated using Density Functional Theory. The optimal configurations, adsorption energies, charge transfer, and electrical properties of each complex were calculated. It was found that doped coronene had stronger adsorption strength and charge transfer compared to pristine coronene. The stability of the complexes was attributed to non-covalent interactions in the interactive region. The change in electrical conductivity of coronenes after adsorption suggested their sensitivity towards DNA bases. The predicted energy gap and prolonged recovery time for adenine-coronene configurations indicated the potential application of pristine/doped coronene in DNA detection.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Gang Zhou, Yongwei Liu, Biao Sun, Zengxin Liu, Cuicui Xu, Rulin Liu, Qi Zhang, Yongmei Wang
Summary: The CFD-DEM method was used to simulate the dust deposition pattern in the bronchus of anchor digging drivers, revealing the highest dust concentration in the vortex region of the working face. The study also found a positive correlation between dust particle diameter and bronchial deposition rate, and a negative correlation with alveolar deposition rate.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Yan Zhang, Yafei Luo, Lingkai Tang, Mingyan E, Jianping Hu
Summary: This study investigates the effects of different transition metal decorations on B12N12 nanocages on the adsorption properties of nitrosourea drugs using computational methods. The results reveal the presence of weak non-covalent interactions between metals and nanocages, and the interaction between drugs and nanocages plays a significant role in drug adsorption. Compared to free drugs, the adsorption of drugs on nanocages can facilitate electron transfer, reduce energy gaps and chemical hardness, indicating activity at the target site.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
C. I. Alcolado, J. Poblete, L. Garcia-Rio, E. Jimenez, F. J. Poblete
Summary: In this study, the selective oxidation of aromatic aldehydes was investigated using Ru(VI) as a catalyst and hexacyanoferrate (III) as a cooxidant in an alkaline medium. The reaction mechanism involves complex reaction orders for the oxidant and the aromatic aldehyde, while the reaction order for Ru(VI) is one. The proposed mechanism includes two catalytic cycles and the formation and decomposition of complexes. Quantitative structure-activity relationship analysis showed that deactivating groups in the para-position enhance the process.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Hongyan Huang, Chunquan Li, Siyuan Huang, Yuling Shang
Summary: This study examines the sensitivity of the thermal conductivity of water-based alumina nanofluids to changes in concentration, sphericity, and temperature. The results show that volume fraction and temperature have a significant impact on the thermal conductivity, while sphericity also needs to be considered. A support vector machine regression model was created to analyze the sensitivity of the thermal conductivity to different parameters. The findings indicate that temperature, sphericity, and volume fraction are the most sensitive variables.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Correction
Chemistry, Physical
V. M. Pergamenshchik, T. Bryk, A. Trokhymchuk
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Valentyn Rudenko, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, Yuriy Garbovskiy
Summary: This paper reports on the synthesis, structural characterization, spectral and nonlinear-optical properties of glass nanocomposites made of glass forming ionic liquid crystals and nanoparticles. The study reveals that by exciting the nanocomposites within their absorption band, a control over effective optical nonlinearities can be achieved, allowing the modification of the magnitude and sign of the effective nonlinear absorption coefficient. The proposed strategy using metal-alkanoates based glass-forming ionic liquid crystals and nanoparticles shows great potential for the development of nanophotonics and plasmonics technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2024)