Article
Computer Science, Interdisciplinary Applications
Pengwei Zhang, Baoguo Liu, Liming Hu, Jay N. Meegoda
Summary: A coupled multiphase flow computational model is developed to simulate gas hydrate extraction with phase transition and pore compression. The model is validated and used to investigate the factors influencing gas hydrate extraction efficiency through the simulation of a gas hydrate chimney.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Environmental
Zhengbiao Peng, Shaolei Gai, Milan Barma, Mohd. Mostafizur Rahman, Behdad Moghtaderi, Elham Doroodchi
Summary: The study examines the gas-liquid-solid flow patterns and characteristics in slurry Taylor flow-based multiphase microreactors, determining their dependence on operating conditions. The research identified four STF patterns based on bubble surface distortion and particle travel between slugs, with different patterns occurring at varying fluid velocities. Empirical correlations were developed to predict bubble rising velocity, bubble size, and slug length in STFRs, valid across a wide range of fluids and channel sizes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Marciellyo Ribeiro de Oliveira, Marcio Ferreira Martins, Humberto Belich, Leandro Amorim
Summary: This paper presents a general model for two-phase flow and investigates the influence of pipe inclination on flow pattern transitions. Mathematical relations for shear stress and velocity profile are derived, and a new methodology based on geometric parameters is proposed to simplify the equations.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Thermodynamics
Xiangyuan Zhao, Qiang Xu, Quanhong Wu, Yingjie Chang, Yeqi Cao, Suifeng Zou, Liejin Guo
Summary: Severe slugging poses a threat to the operation of high-pressure long petroleum pipelines. An experiment is conducted in a 380m long and 75mm inner diameter pipeline-riser system, and flow pattern maps are established. Under high-pressure conditions, liquid fallback and second blowout of severe slugging disappear, flow pattern types reduce, and severe slugging region shrinks. The correlation equation proposed can predict the severe slugging period with an average error of less than ±7.9%.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Construction & Building Technology
Dalong Jin, Dajun Yuan, Jiahua Mao
Summary: This paper focuses on the face stability analysis of a tunnel driven by a slurry shield machine in the water-bearing ground. A multifield model coupling seepage flow and face stability of the tunnel is developed. The study shows that the support effectiveness decreases with the slurry penetration into the ground, and the traditional membrane model leads to an overestimation of the face stability.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Mechanics
Fryderyk Wilczynski, Christopher J. Davies, Christopher A. Jones
Summary: This study develops and analyzes a continuum model of two-phase slurry dynamics in planetary cores. The results suggest that a pure iron slurry F-layer in Earth's core would contain a mean solid fraction of at most 5%.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Polymer Science
Abdelsalam Alsarkhi, Mustafa Salah
Summary: This paper presents a comprehensive experimental investigation on the effect of drag reducing polymers (DRP) in enhancing throughput and reducing pressure drop in a horizontal pipe carrying two-phase flow of air and water mixture. The study also tests the ability of these polymers to damp turbulence waves and change flow regime. The results show that maximum drag reduction occurs when highly fluctuated waves are effectively reduced by DRP, leading to phase transition.
Article
Engineering, Manufacturing
Yan Hu, Qingwen Dai, Wei Huang, Xiaolei Wang
Summary: This study proposes a multiphase jet machining method using viscous water to suspend abrasives, aiming to enhance the stability of powder mass flowrate and improve the control of the erosion zone.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Energy & Fuels
Pavel G. Struchalin, Vegar H. Oye, Pawel Kosinski, Alex C. Hoffmann, Boris Balakin
Summary: This article discusses a flow loop study on the risk of cohesive particle slurries in subsea petroleum production. The study focuses on a slurry with ice particles consistent with 0.23-mm size in decane. The experiments showed that increased viscosity of the slurry led to higher pressure drops and the formation of plugs, with particle concentration also influencing plug formation.
Article
Energy & Fuels
Guoyun Shi, Shangfei Song, Bohui Shi, Jing Gong, Dongliang Chen
Summary: This study proposes a new transient model for gas hydrate slurry flow, which combines a two-fluid model and temperature equation for describing the two-phase flow and establishes equations for the particulate phase flow using Eulerian and Lagrangian approaches. The model is verified and applied to analyze the transient behavior of gas hydrate slurry multiphase flow, as well as conducting sensitivity analysis on flowrate, initial droplet size, and drag force. These results provide practical insight into hydrate slurry multiphase flow and contribute to better hydrate management in the petroleum industry.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Review
Chemistry, Physical
Jianchao Cai, Yin Chen, Yang Liu, Shuang Li, Chenhao Sun
Summary: This review critically summarizes the fundamentals and concepts of various capillary imbibition models within different geometries over the past 100 years. It discusses the applications of these models and proposes a universal model based on dynamic wetting conditions and equivalent cylindrical geometry. Future research is suggested to focus on analyzing corner flow dynamics, wetting fluid snap-off, capillary rise of non-Newtonian fluids, and employing accurate physical simulation methods for capillary-driven flow processes.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Xuewen Cao, Kairan Yang, Hongchao Wang, Jiang Bian
Summary: The gas-liquid flow behavior laden by hydrate particles is significant for the flow assurance of submarine natural gas hydrate production. This study developed an integrated model to investigate the gas-liquid-hydrate flow problem in a vertical pipe and analyzed the effects of particle behavior on flow pattern transition.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Mechanics
J. Singh, S. Catsoulis, D. Lakehal, C. Narayanan
Summary: The main contribution of this paper is applying computational fluid dynamics (CFD) to study slurry flow using a two-phase mixture model. The study compared the results obtained from the mixture model to experimental results and numerical results from a more advanced Eulerian granular flow model. The authors found that the mixture model with algebraic slip and turbulent dispersion accurately predicted the pressure drop in the slurry flow, challenging the conclusions of a previous study that used the mixture model but observed higher pressure drops without proper justification. The authors also concluded that the mixture model can be used for pressure drop predictions even at high solids fraction.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Engineering, Mechanical
Oluwaseun Ezekiel Adedeji, Lisheng Zhang, David E. S. Breakey, R. Sean Sanders
Summary: Friction loss in slurry pipelines transporting coarse particles is influenced by Coulombic and kinematic friction. Experimental investigations using the Toroid Wear Tester showed that abrasive wear under Coulombic friction conditions could be predicted, with measured wear rates correlating with Coulombic shear stress. This study demonstrates the potential for predicting actual slurry pipeline wear rates from TWT experiments.
Article
Engineering, Chemical
Jai Krishna Sahith Sayani, Kuah Jian Ho, Bhajan Lal, Srinivasa Rao Pedapati
Summary: This work conducts an experimental and modelling study on the phase behavior of gas hydrates formation for a high CO2 content natural gas system and multiphase gas dominant system. The prediction capabilities for gas hydrates formation conditions are verified using CSMGem, PVTSim, and Aspen HYSYS software packages. The results show that PVTSim software package has the best accuracy for both pure and multiphase systems.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
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)