Article
Energy & Fuels
Zaixing Liu, Jiguang Wang, Weiguo Liu, Yanghui Li, Chen Lang, Mengmeng Zhang, Yongchen Song
Summary: The study shows that an increase in salt concentration can significantly decrease the viscosity of hydrate slurries and improve their stability. High salinity in the aqueous phase is beneficial for extending the stable flow time of hydrate slurries.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Weiguo Liu, Ran Liu, Mengmeng Zhang, Zaixing Liu, Chen Lang, Yanghui Li
Summary: Solid fluidization is a promising method for exploring hydrate resources. The rheological properties of hydrate slurry play a significant role in preventing blockages during pipeline transportation. This study found that the presence of hydrate substantially increases the apparent viscosity of mudflow, with higher water conversion rates leading to significantly increased viscosity of hydrate slurry.
Article
Engineering, Chemical
Y. Salehy, P. Clain, A. Boufares, N. Chami, J-P. Torre, D. Dalmazzone, L. Fournaison, A. Delahaye
Summary: Recent studies have explored the potential use of hydrate slurries in indirect refrigeration systems, but pipeline clogging issues due to hydrate agglomeration can arise. Additives, such as Dioctyl sodium sulfosuccinate (AOT), are commonly utilized to mitigate these problems. This study investigates the rheological properties of CO2 hydrate slurries, specifically the impact of AOT. A capillary viscometer method and a dynamic loop were employed to assess fluid behavior and collect experimental data. The study reveals a shear-thinning behavior and emphasizes the potential of AOT in significantly improving the properties of CO2 hydrate slurries.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Sanehiro Muromachi, Kiyofumi Suzuki, Norio Tenma
Summary: This study reports phase equilibrium data for urea + methane + water and urea + carbon dioxide + water systems, and finds that urea can be used as a thermodynamic hydrate inhibitor in subsea methane hydrate systems. The inhibition effect of urea is slightly weaker than that of methanol, but it can reach applicable hydrate inhibition temperatures under specific conditions. Based on the present equilibrium data and seafloor conditions, urea can be used for methane gas production and hydrate-based carbon capture and storage systems.
FLUID PHASE EQUILIBRIA
(2023)
Article
Engineering, Chemical
Chandan Sahu, Siddhant Kumar Prasad, Rajnish Kumar, Jitendra S. Sangwai
Summary: The rheological properties of CO2 hydrate slurries with and without the surfactant SDS were studied. It was found that dissolved CO2 actively participated in the nucleation and growth of hydrate crystals at higher pressures. The addition of SDS reduced the peak and steady-state viscosities of the slurries and exhibited pseudoplastic behavior. The presence of SDS also delayed the dissociation of CO2 hydrates and improved their stability and flowability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Thermodynamics
Zaixing Liu, Yanghui Li, Jiguang Wang, Mengmeng Zhang, Weiguo Liu, Chen Lang, Yongchen Song
Summary: This study investigates the rheological characteristics of hydrate slurries formed in marine sediments using a high-pressure rheometer. The results indicate that the viscosity change is more significant with higher sediment concentration. Oscillatory measurements show that hydrate slurries display viscoelastic fluid characteristics. The yield stress sharply increases when the hydrate volume fraction exceeds a critical value.
Article
Energy & Fuels
G. Kuznetsov, D. S. Romanov, K. Yu Vershinina, P. A. Strizhak
Summary: The experimental research findings on fuel slurries show that adding up to 10% used oil or wood sawdust can increase slurry viscosity by 50-70%, but exceeding 5% and 10% shares of oil and biomass respectively results in loss of fluidity. The mass fraction of solid part in fuel based on coal sludge should be limited to around 55%. Evaluation indicates that fuel mixtures based on coal sludge and water are the most preferable ones.
Article
Chemistry, Multidisciplinary
Cristina Gallego, Alba Somoza, Hector Rodriguez, Ana Soto
Summary: The study proposed a method to prepare eutectic solvents based on surfactants and polymers for enhanced oil recovery. The most promising combination was found to be AOT + PEG-600, which exhibited good thermal stability and interfacial tension at a 40:60 molar ratio. Core-holder experiments showed an encouraging 34% additional oil recovery with the optimized formulation at room temperature.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Rebeca Fortes Martin, Claudia Prietzel, Joachim Koetz
Summary: In this study, bimetallic magnetite-gold nanostructures were synthesized using microemulsions, with different types of nanoparticles modulating the morphology and surfactant film properties. Phase separation into Winsor phases allowed the formation of micrometer-scale bimetallic heterostructures upon solvent evaporation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Energy & Fuels
Siddhant Kumar Prasad, Jitendra S. Sangwai
Summary: This study investigated the impact of chain length of saturated hydrocarbons on methane hydrate formation and dissociation kinetics in oil-in-water dispersions. Sodium dodecyl sulfate was used as a surfactant to simulate natural surfactants. The results showed that an appropriate concentration of SDS enhanced the hydrate formation during initial stages, but higher concentrations disrupted the structure of local water. With a fixed SDS concentration, higher carbon chain length accelerated the hydrate formation during initial stages before reaching similar formation kinetics. Higher concentrations and higher alkane content delayed the gas release during dissociation.
Article
Energy & Fuels
Limin Wang, Xin Zheng, Peng Xiao, Xing Huang, Bei Liu, Zhi Li, Guangjin Chen, Changyu Sun
Summary: The role of wax crystals in hydrate nucleation and growth is complex, with inhibitory effects on growth but dual effects on nucleation. The mass transfer of methane is influenced by the presence of wax crystals, whereby smaller crystals promote nucleation and larger crystals hinder mass transfer.
Article
Engineering, Chemical
Zaixing Liu, Weiguo Liu, Chen Lang, Ran Liu, Yongchen Song, Yanghui Li
Summary: A new viscosity model for hydrate slurries was developed based on the Camargo-Palermo model and the bimodal suspension model, and validated through rheological measurements using a high-pressure rheometer. The model predictions matched well with experimental data in metastable hydrate suspension systems with varying initial water cuts or water conversion rates.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Jun Chen, Yaosong Zeng, Chenzhe Liu, Mengqi Kang, Guangjin Chen, Bin Deng, Fanhua Zeng
Summary: This study shows that different types of anti-agglomerants have different effects on methane hydrate dissociation, and water cut and anti-agglomerant dosage also affect dissociation. The increase of water cut significantly increases the maximum dissociation rate.
Article
Thermodynamics
Liang Mu, Qiqi Tan, Xianlong Li, Qingyun Zhang, Qingyan Cui
Summary: A novel method for storing methane by forming hydrate in high water cut emulsions using an excellent anti-agglomerant (CDA) and sorbitan monododecanoate (Span 20) was developed. The methane storage achieved a volume ratio of gas to hydrate of 151.1 v/vh within 60 minutes in the 60 vol% systems, which was significantly higher than previous tests using single and combined additives. The effects of CDA concentration, initial pressure, and stirring speed on hydrate formation were investigated. The fastest hydrate growth occurred within 20 minutes at 1000 rpm, with methane storage reaching 151.9 v/vh. The maximum gas uptake was achieved within 2 hours at 8.2 MPa.
Article
Chemistry, Multidisciplinary
Hannah McPhee, Vikram Soni, Sepehr Saber, Mohammad Zargartalebi, Jason Riordon, Michael Holmes, Matthew Toews, David Sinton
Summary: This study investigates the rheological behavior of encapsulated and nonencapsulated phase change slurries (PCSs) in flowing thermal energy systems. The physical and thermal properties, as well as the rheological behavior, of the PCS candidates are examined at different shear rates, temperatures, and concentrations. The effect of shell robustness and melting on shear thickening and shear thinning is discussed, along with an analysis of pumping power requirements. A viscosity limit of 0.1 Pa·s for optimal thermal performance in high-flow applications is identified through hysteresis and oscillatory flow tests.
Article
Computer Science, Interdisciplinary Applications
Matthew W. Liberatore, Kayla E. Chapman, Katherine M. Roach
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2020)
Article
Dentistry, Oral Surgery & Medicine
Prabaha Sikder, Jessica A. Ferreira, Ehsan Akbari Fakhrabadi, Karla Z. Kantorski, Matthew W. Liberatore, Marco C. Bottino, Sarit B. Bhaduri
Article
Chemistry, Medicinal
Frank Oppong, Zehui Li, Ehsan Akbari Fakhrabadi, Tanvi Raorane, Paras M. Giri, Matthew W. Liberatore, Jeffrey G. Sarver, Christopher J. Trabbic, Corey E. Hosier, Paul W. Erhardt, William A. Maltese, Jerry Nesamony
JOURNAL OF PHARMACEUTICAL SCIENCES
(2020)
Article
Chemistry, Applied
A. Huynh, A. G. Garcia, L. K. Young, M. Szoboszlai, M. W. Liberatore, G. Baki
Summary: This project quantitatively characterized the rheology and textural properties of six cosmetic emulsions containing green, bio-derived emollients and identified statistical relationships between consumers' descriptions of products and instrumental measurements. The results showed differences in texture and rheology among the emulsions, with the use of olive oil instead of heptyl undecylenate as an emollient leading to increased firmness, spreading, stickiness, viscosity, and droplet size.
INTERNATIONAL JOURNAL OF COSMETIC SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Colin Shortridge, Ehsan Akbari Fakhrabadi, Leah M. Wuescher, Randall G. Worth, Matthew W. Liberatore, Eda Yildirim-Ayan
Summary: The study investigated the effects of the digestive inflammatory environment on scaffold degradation, prevention of premature degradation using genipin crosslinking, and how genipin crosslinking affects IL-4 release and differentiation of naive macrophages. The results showed that the digestive inflammatory environment led to increased protein release from the scaffold, which was improved through genipin crosslinking. The optimal genipin concentration improved IL-4 release, cell viability, mechanical strength, scaffold porosity, and immunomodulation studies, but also decreased the immunomodulatory capacity of the scaffold.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Mechanics
Ehsan Akbari Fakhrabadi, Chloe A. Bullard, Matthew W. Liberatore
Summary: This study reveals shear thickening behavior in colloidal dispersions at various shear rates and concentrations, with the critical shear rate strongly depending on silica concentration. Introducing different sizes and concentrations of silica particles can tune the critical thickening shear rate, but the thickening phenomenon exhibits irreversibility.
Article
Engineering, Chemical
Ehsan Akbari Fakhrabadi, Chris Kajzer, Jonathan J. Stickel, Matthew W. Liberatore
Summary: The study aims to investigate the flow behavior of compressed biomass under conditions similar to compression-screw feeders, finding that the deformation of compressed biomass is strongly dependent on screw speed and moisture content. Shear stress in woody biomass decreases with shear rate, while viscosity decreases with increased screw speed and moisture content.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Mechanics
Sedi Helsper, Abdualbaset A. Ali, Matthew W. Liberatore
Summary: The study found that shear rate, cooling rate, and wax concentration affect the wax appearance temperature, with shear rate having a relatively small impact on WAT. Different fluid characteristics influence the change in yield stress upon wax formation. Adding shear rate to the phase diagrams of waxy oils could help address flow assurance needs in the industry.
Article
Chemistry, Applied
Briana Maktabi, Matthew W. Liberatore, Gabriella Baki
Summary: The study found that meadowfoam seed oil performed similarly to castor oil and octyldodecanol as a pigment dispersing agent in lipsticks. The hardness and other characteristics of lipsticks varied based on differences in viscosity of dispersing agents and oil absorption of the powder, showing that by modifying the amount of pigment and dispersing agent used, lipsticks with similar characteristics to commercial products can be formulated.
INTERNATIONAL JOURNAL OF COSMETIC SCIENCE
(2021)
Article
Chemistry, Applied
Sedi Helsper, Wesam A. Hatem, Lisa Young, Zane Wilhelm, Matthew W. Liberatore
Summary: The demand for biodiesel has increased due to its environmental friendliness. This study investigated the crystallization temperature of fatty acid methyl esters (FAMEs) in biodiesel and found that their composition, shear rate, and cooling rate all affect the crystallization temperature.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2022)
Article
Engineering, Chemical
Ehsan Akbari Fakhrabadi, Jonathan J. Stickel, Matthew W. Liberatore
Summary: Friction between wood particles is a crucial factor in designing processing equipment for cellulosic biofuels and similar natural products. Understanding the friction between wet and dry wood particles can assist in the design and modeling of equipment, such as screw feeders.
Article
Computer Science, Interdisciplinary Applications
Kayla E. Chapman, Megan E. Davidson, Nneka Azuka, Matthew W. Liberatore
Summary: Interactive digital technologies enable real-time monitoring of student progress in higher education through the capture and analysis of big data. This study uses learning analytics research to examine deliberate practice in a chemical engineering online textbook. The study analyzes metrics such as fraction correct, attempts before correct, and attempts after correct to understand question type and order effects. The study also combines multiple metrics to create a deliberate practice score, which can optimize homework assignments and reward students for solving challenging problems.
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2023)
Article
Chemistry, Multidisciplinary
Uchenna Asogwa, T. Ryan Duckett, Amanda P. Malefyt, Lindsey Stevens, Gale Mentzer, Matthew W. Liberatore
Summary: This study investigated the differences in problem difficulty and problem-solving ability when solving video-inspired student-written problems versus Textbook problems. The findings showed that students perceived both types of problems as equally difficult, but exhibited better problem-solving skills when solving the video-inspired problems. Furthermore, students demonstrated better problem-solving skills on the most difficult video-inspired problems compared to the most difficult Textbook problems.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Education, Scientific Disciplines
Uchenna Asogwa, T. Ryan Duckett, Amanda P. Malefyt, Lindsey Stevens, Gale Mentzer, Matthew W. Liberatore
Summary: This study examined the rigor of student-written YouTube problems and students' problem-solving skills when solving these problems compared to textbook problems. The results showed that students demonstrated better problem-solving ability when completing YouTube problems compared to textbook problems.
INTERNATIONAL JOURNAL OF ENGINEERING EDUCATION
(2021)
Article
Chemistry, Physical
Kavindya K. Senanayake, Namita Shokeen, Ehsan Akbari Fakhrabadi, Matthew W. Liberatore, Ashis Mukhopadhyay
