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
Xin Zhao, Qingchao Fang, Zhengsong Qiu, Shiyou Mi, Zhiyuan Wang, Qi Geng, Yubin Zhang
Summary: The research found that in oil-free gas-water systems, traditional anti-agglomerants had no effect on agglomeration, while kinetic inhibitors could slow down hydrate formation but not inhibit agglomeration. An amphiphilic amide compound DCA effectively prevented hydrate agglomeration and blockage by reducing the cohesion force between hydrate particles and changing the surface characteristics of the particles, preventing liquid bridges from forming and inhibiting adhesion and agglomeration.
Review
Engineering, Chemical
Shaobai Li, Xuelin Sun
Summary: This article reviews the research progress on the droplet motion characteristics in non-Newtonian fluids, including the mechanism of droplet deformation, the influence of different rheological properties on droplet shape, and the empirical correlations of droplet aspect ratio. The dimensionless correlations of drag coefficient are also discussed. Currently, there are relatively few drag coefficient correlations of droplets in non-Newtonian fluids, but the correlation of drag coefficients of bubbles in non-Newtonian fluids can provide some reference. Finally, the possible prospects for future studies of the subject are proposed.
CHEMBIOENG REVIEWS
(2023)
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
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)
Review
Mechanics
Randy H. Ewoldt, Chaimongkol Saengow
Summary: Taking a step away from Newtonian fluid behavior opens up a wide range of possibilities in terms of non-Newtonian fluid properties. This complexity introduces challenges that need to be addressed. The article explores useful rheological complexity, organizing principles, and design methods to answer questions related to the utility and attainment of non-Newtonian properties.
ANNUAL REVIEW OF FLUID MECHANICS
(2022)
Article
Chemistry, Physical
Marta Stachnik, Monika Sterczynska, Emilia Smarzewska, Anna Ptaszek, Joanna Piepiorka-Stepuk, Oleg Ageev, Marek Jakubowski
Summary: The study on the rheological properties of hot trub in industrial settings revealed that regardless of the raw materials and extract used, all samples exhibited the same rheological properties with different values. The viscosity of hot trub was found to be influenced by both the composition of the raw materials and the temperature.
Article
Energy & Fuels
Xufeng Li, Zilong Meng
Summary: Gas hydrate, an ice-like crystal, can plug offshore oil and gas pipelines. This study focuses on finding new anti-agglomerates to reduce the cost of hydrate control. Fourteen different polymers were selected and experimentally tested for their ability to prevent agglomeration of gas hydrate. The results show that two of the polymers are effective in preventing plugging at low hydrate concentrations.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Jie Zhang, Chuanxian Li, Fei Yang, Lei Shi, Bo Yao, Guangyu Sun
Summary: This study investigates the transformation of water droplets into hydrate particles in the presence of waxes and asphaltenes in crude oil. The results show that dissolved wax molecules enhance the porosity, degree of transformation, and surface roughness of hydrate particles. Furthermore, the size of hydrate particles increases over time. In addition, the precipitation of waxes precedes hydrate formation, and the viscosity of the continuous phase increases significantly once the crystal network structure is formed, inhibiting the hydrate transformation process. Moreover, the presence of asphaltenes influences adsorption at the oil-water interface and inhibits the effect of wax molecules on hydrate particles. The concentration of asphaltenes needed to inhibit the effect of wax molecules is proportional to the wax concentration.
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)
Review
Physics, Condensed Matter
Christopher Ness, Ryohei Seto, Romain Mari
Summary: This article reviews the current understanding of the relationship between particle-scale physics and macroscopic rheology, and demonstrates how this perspective opens new avenues for the development of continuum models for dense suspensions.
ANNUAL REVIEW OF CONDENSED MATTER PHYSICS
(2022)
Article
Mathematics, Applied
Jakub Woznicki
Summary: The paper discusses a system of PDEs describing a non-homogeneous, non-Newtonian and incompressible fluid in a space-periodic domain. It defines generalized dissipative weak solutions and proves their existence with provided boundary data. The main result of the work is the weak-strong uniqueness of the defined solutions.
NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
(2022)
Article
Chemistry, Physical
Sepehr Saber, Mohammad Zargartalebi, Amin Kazemi, David Sinton
Summary: By adjusting environmental variables such as salinity and temperature, stability of Pickering phase change slurries (PPCS) can be achieved, and their shear-induced instability can be improved. Experimental results indicate that increasing salinity enhances the formulation's resistance to shear-induced instability, and within a certain volume fraction range, viscosity increases significantly. Regardless of salinity, the resulting PPCS formulations remain stable under high pressure and temperature conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Nadia Kashif, Boris Albijanic, Jing Jing Xu, Syahida Syahida, Teresa McGrath, Bogale Tadesse, Muhammad Kashif Nazir
Summary: The influence of bentonite on the grinding efficiencies of ores has been examined in this study. It was found that the presence of bentonite in the ore negatively affected the grinding performance of the ore, but this negative effect was mitigated by adding Ca2+ ions. The addition of Ca2+ ions reduced the repulsive forces between bentonite particles, leading to improved settling rates and grinding performance.
APPLIED CLAY SCIENCE
(2023)
Article
Mechanics
R. H. Hernandez
Summary: This study investigates the evolution of concentrated particle suspensions in a two dimensional channel flow, focusing on shear-induced migration phenomenon in both Newtonian and non-Newtonian carrier fluids. A numerical model based on the finite volume method is developed to predict flow field, particle migration fluxes and gravitational mechanisms.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)