Article
Engineering, Chemical
Shenglin Yan, Yan Zhang, Chong Peng, Xiaoyong Yang, Yuan Huang, Zhishan Bai, Xiao Xu
Summary: The interaction process between the moving oil droplet and the gas bubble in flotation was studied using experimental and simulation methods. The results showed differences between the experimental and simulation results, but the BBO model could reflect the velocity change trend of the oil droplet.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Shenglin Yan, Yan Zhang, Xiaoyong Yang, Yuan Huang, Zhishan Bai, Xiao Xu
Summary: Increasing NaCl concentration enhances the covering effect of oil droplets on bubbles, reduces covering time, and promotes more uniform spreading of oil droplets on the surface of bubbles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Environmental Sciences
Ce Wang, Yuling Lu, Chao Song, Dechong Zhang, Feng Rong, Limin He
Summary: This paper summarizes and compares flotation techniques widely used in produced water treatment, and discusses the mechanism of the oil droplet-bubble interaction as well as the effects of flocculant, pH, and salinity on the flotation process. The research status of produced water treatment by air flotation is summarized, and future research directions are proposed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Alexey M. Amdur, Sergei A. Fedorov, Vera V. Yurak
Summary: Adding minerals such as calcite and fluorite to the slag can significantly reduce the sulfur content, decrease the non-ferrous metals content, and prevent precious metals from entering the slag, ultimately improving the recovery rate of gold and platinum.
Article
Physics, Fluids & Plasmas
Gaelle Rondepierre, Francois Lequeux, Emilie Verneuil, Nicolas Passade-Boupat, Laurence Talini
Summary: This study reports on the thinning mechanisms of supported films of surfactant (nTAB) solutions above the critical micellar concentration. Depending on the length of the carbon chain of the surfactant and its concentration, two modes of destabilization of the stratified films are observed, including heterogeneous nucleation and spinodal stratification.
Article
Engineering, Chemical
Hainan Wang, Yannan Liang, Danlong Li, Ruifeng Chen, Xiaokang Yan, Haijun Zhang
Summary: This study investigates the effect of particle hydrophobicity on the bubble-particle collision and subsequent interaction process. It was found that highly hydrophobic particles are more likely to collide and attach to bubbles. The particle hydrophobicity also has a significant impact on the particle trajectories and velocities. The distance between the particle and the bubble remains nearly constant during the particle sliding process. Additionally, hydrodynamic drag plays an important role in the particle sliding process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Jonas Miguet, Florence Rouyer, Emmanuelle Rio
Summary: This paper presents the current knowledge on the physics of surface bubbles lifetime, highlighting the diversity of mechanisms at play. It explores the role of drainage and evaporation on film thinning, emphasizing the existence of two different scenarios depending on the thickness at which the cap film ruptures.
Review
Engineering, Chemical
Rogerio Manica, Bo Liu, Mingda Li, Zhixiang Chen, Qingxia Liu
Summary: The movement of bubbles inside a liquid and their interaction with other bubbles, solid particles, or surfaces is important for understanding natural phenomena and improving industrial applications such as mineral flotation. Recent research has shown that the surface mobility affects the rising speed of a single bubble and the coalescence of bubbles, which in turn affects the efficiency of flotation. It has also been found that the surface mobility is influenced by solution chemistry, the aging of the air-water interface, and hydrodynamic flow.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
T. Uysal, O. Guven, O. Ozdemir, I. E. Karaagaclioglu, B. Tunc, M. S. Celik
Summary: The study introduces a new approach to correlate the aggregation and flotation of sphalerite mineral with morphological variations. Adjusting the morphology of sulfide particles enhances particle-particle interactions, improves bubble-particle interactions, and facilitates the flotation process.
MINERALS ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Masatoshi Ohashi, Takafumi Maruishi, Atsushi Toramaru
Summary: This study investigates the dynamics of bubble coalescence in ascending magma and reveals the important influence of bubble growth on film drainage. Experimental results show that the capillary number is related to bubble shape and drainage timescale, and can explain the variations of bubbles during decompression.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Mechanics
Daniela F. S. Ribeiro, Miguel R. O. Panao, Jorge M. M. Barata, Andre R. R. Silva
Summary: The goal of this study is to investigate the mechanism of bubble encapsulation when a drop impacts a thin liquid film. The results show that the mechanism consists of two stages. In the first stage, the drop impacts the liquid film, causing a prompt splash and a crown splash. The collapsing crown-bounding rim encapsulates air, forming a bubble. In the second stage, three different phenomena of bubble encapsulation can occur. The study also examines the first perturbation imposed by the drop impact and proposes an empirical correlation for its propagation velocity. Additionally, the geometry of the bubble is investigated.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Engineering, Chemical
You Zhou, Boris Albijanic, Rasoul Panjipour, Yuling Wang, Jianguo Yang
Summary: Understanding and predicting attachment efficiency (P-a) and induction time (ti) are crucial for optimizing flotation circuits. Experimentally determined P-a is more sensitive to changes in experimental conditions compared to ti and flotation rate constant (k).
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yvonne Wu, Leia Fan, Elaine Jian, Eric Lee
Summary: This study theoretically investigates the electrophoresis of dielectric fluid droplets with arbitrary surface potentials. It is found that the viscosity-dependence of droplet mobility is synchronized with the presence of an exterior vortex flow surrounding the droplet, and critical points are discovered for highly charged droplets where the droplet surface becomes immobile and the interior fluid becomes motionless.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Seongsoo Han, Anh Nguyen, Kwanho Kim, Jai-koo Park, Kwangsuk You
Summary: The attachment of air bubbles to solid surfaces in water is studied experimentally, with attachment time quantified from transient force curves or film thickness. The presence of interfacial gas enrichment (IGE) is found to be a significant factor in controlling hydrophobic attraction between the bubble and surface attachment. This factor must be considered for accurate theoretical predictions.
Article
Green & Sustainable Science & Technology
Guangxi Ma, Xiangning Bu, Ugur Ulusoy, Guangyuan Xie
Summary: This study investigates the role of particle shape in their adhesion to air bubbles during flotation. The results show that cubic particles have the highest attachment efficiency, while spherical particles have the lowest. The study also highlights the importance of particle edges and vertices in improving attachment efficiency. These findings provide important insights for selecting and controlling particle shape in the flotation process.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Wenquan Gu, Shenglin Yan, Zhishan Bai
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Engineering, Chemical
Xiaoyong Yang, Bingjie Wang, Huiqing Luo, Shenglin Yan, Jian Dai, Zhishan Bai
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2020)
Article
Chemistry, Physical
Bin Zhang, Bingjie Wang, Shenglin Yan, Zhishan Bai, Ziqiang Hu, Zhaojin Lu
Summary: This study introduced a method that combines CFD with DEM to simulate fixed bed reactors and validated the reliability of the model used. The research demonstrated that, when the diameter ratio was 5, the velocity distribution was uniform, and the pressure drop was relatively small, which was beneficial for the reaction process.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Jin Li, Xiaoli Fu, Shenglin Yan
Summary: A new type of combined seal structure (CSS) consisting of the labyrinth structure and the nozzle structure has been proposed based on the study of leakage characteristics of labyrinth seal structure (LSS). The performance of CSS is much better than that of LSS, with a decrease in leakage rate of 30%-40% compared to LSS. The leakage rate increases as the internal resistance of the device increases, while it decreases with larger inlet flow.
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Chemical
Shenglin Yan, Yan Zhang, Xiaoyong Yang, Yuan Huang, Zhishan Bai, Xiao Xu
Summary: Increasing NaCl concentration enhances the covering effect of oil droplets on bubbles, reduces covering time, and promotes more uniform spreading of oil droplets on the surface of bubbles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Junjie Zhao, Bin Zhang, Xiaoli Fu, Shenglin Yan
Summary: This study focuses on the impact and optimization of vortex generators in radiators on the ends of motor coils, concluding that a 45-degree attack angle generator is most effective. Results show that FD with a longitudinal distance of 4 h performs well at Reynolds numbers below 4000, while FU-4 h-0.5 h is more prominent at higher Reynolds numbers.
Article
Green & Sustainable Science & Technology
Bin Zhang, Jin Li, Xiaoli Fu, Shenglin Yan
Summary: This study established a three-dimensional model to investigate the influence of pressure ratio and rotational speed on the leakage characteristics of a combined seal structure. The results showed that the leakage rates of different seal structures decreased with increasing pressure ratio and rotational speed. A critical value for the influence of rotational speed on the leakage rate was identified. The study also found that the jet structure had a significant impact on the sealing characteristics.
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)