Article
Engineering, Chemical
Ege Ertekin, John M. Kavanagh, David F. Fletcher, Dale D. McClure
Summary: This paper presents a model that accurately simulates the hydrodynamics of bubble columns and shows good agreement with experimental data. The study also takes into account the presence of surface-active compounds in industrial processes, providing computational predictions in line with experimental measurements. Furthermore, a dataset has been provided to facilitate validation work by others and identify areas for further research.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Bochao Cui, Ping Chen, Yuanqi Zhao
Summary: This study investigates the impact of gas volume fraction, elbow angle, and rib installation position on pipe erosion under multiphase bubble flow. The results show that the pipe erosion rate increases as the gas volume fraction and elbow angle increase, while a rib at a suitable installation position can protect the pipe from erosion by particles.
Article
Mechanics
Vikash Pandey, Dhrubaditya Mitra, Prasad Perlekar
Summary: A direct numerical simulation study of buoyancy-driven bubbly flows in the presence of large-scale driving that generates turbulence reveals that increasing turbulence intensity leads to more curved bubble trajectories and decreased average rise velocity. The energy spectrum of the flow exhibits pseudo-turbulence scaling for small length scales and Kolmogorov scaling for larger scales. A scale-by-scale energy budget analysis helps understand the scaling behavior seen in the spectrum, with statistical properties consistent with experiments on turbulence modulation by air bubbles in water despite the weak buoyancy of the bubbles.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Marine
Han Cheng, Yong Liu, Fu-Ren Ming, Peng-Nan Sun
Summary: This paper studies the bouncing and coalescing behavior of two bubbles rising side by side in a fluid, using a multi-phase smoothed particle hydrodynamics (SPH) model. The numerical simulation is validated through various testing cases and the effects of viscous forces and surface tensions on bubble interaction are considered.
Article
Multidisciplinary Sciences
Li Chaoyue, Feng Shiyu, Xu Lei, Peng Xiaotian, Yan Yan
Summary: The use of nitrogen-enriched air (NEA) for scrubbing aviation fuel can reduce dissolved oxygen levels and counteract flammability in aircraft fuel tanks. Factors such as NEA bubble diameter, NEA superficial velocity, and fuel load were found to impact oxygen transfer between NEA and aviation fuel. The study provides insights into the mass transfer characteristics of aviation fuel scrubbing and can aid in the design of fuel scrubbing inerting systems.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Darren G. Crowdy, Anna E. Curran, Demetrios T. Papageorgiou
Summary: Analytical solutions derived demonstrate that a stagnant cap of surfactant at the interface between two viscous fluids can be remobilized by fast kinetic exchange of surfactant. The system is governed by a forced complex Burgers equation and can be linearized using the Cole-Hopf transformation. The surface Péclet number plays a crucial role in the system, and steady equilibria are found explicitly in terms of parabolic cylinder functions.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Stephane Perrard, Alienor Riviere, Wouter Mostert, Luc Deike
Summary: In this study, the deformation modes and lifetime of a bubble in a turbulent flow are investigated through numerical simulations and theoretical analysis. Two temporal regimes are observed during the bubble deformation process, with the first regime driven by inertial forces and the second regime resulting from a balance between inertial forces and surface tension.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Daniel J. Ruth, Marlone Vernet, Stephane Perrard, Luc Deike
Summary: The study shows that the average rising speed of bubbles in liquid decreases with increasing turbulence intensity, following a specific proportional relationship. This is mainly due to the effects of nonlinear drag and the nearly isotropic behavior of the slip velocity on the mean rise speed.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Kazuki Maeda, Masanobu Date, Kazuyasu Sugiyama, Shu Takagi, Yoichiro Matsumoto
Summary: A series of experiments and modelling were conducted to study the interaction of a pair of spherical bubbles rising in a vertical channel. The results showed that bubbles take two preferential configurations depending on their mutual distance, which helps to elucidate the clustering mechanisms.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
D. Raciti, P. Brocca, A. Raudino, M. Corti
Summary: We present a new interferometric method to study the interactions between two gas bubbles in a liquid undergoing small-amplitude oscillations. The technique allows for accurate measurement of the amplitude, frequency, and phase of oscillation, as well as probing the interactions between the bubbles. This method is of great importance for understanding bubble interactions.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Alienor Riviere, Wouter Mostert, Stephane Perrard, Luc Deike
Summary: This study investigates the dynamics and statistics of bubble break-up in homogeneous and isotropic turbulence through direct numerical simulations, focusing on the influence of the Weber number on bubble break-up dynamics. The findings reveal that during the transition to stable conditions, bubble break-up occurs through both local and non-local production processes, resulting in a range of bubble sizes.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Mirko Gallo, Francesco Magaletti, Carlo Massimo Casciola
Summary: This study investigates the impact of solid walls on bubble formation in heterogeneous nucleation processes, exploring the direct effects of boundary conditions compliant with fluctuation-dissipation balance on nucleation.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Chemical
Hongkai Wang, Meng Tang, Dewu Wang, Yan Liu, Fei Yan, Ruojin Wang, Lu Nie, Shaofeng Zhang
Summary: The study analyzed the flow properties of the blade unit of TRST using the multi-fluid VOF method, revealing that the rotational flow ratio for the gas phase ranged from 0.6 to 0.85, and the transition section of the rotational and perforated flows for the liquid phase was at z = 30 mm.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Chemical
Trilokpati Tribedi, Premsagar Pillajetti, Roushni Kumari, Harish Jagat Pant, Pankaj Tiwari, Rajesh Kumar Upadhyay
Summary: In a Geldart's group B CFB riser, the solid motion predominantly lies in the axial direction. The probability distribution function of solid velocity shows wider distribution near the wall compared to the center of the riser. Mean solid velocity depends largely on gas-solid interactions, while fluctuating velocity depends on both gas-solid and solid-solid interactions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Thermodynamics
Haibo Li, Maocheng Tian, Min Wei, Jingzhi Zhang
Summary: This study numerically investigates the direct-contact condensation (DCC) and boiling issues using the Lee model. A new mass transfer coefficient correlation is proposed and its accuracy is confirmed through experimental results. The study reveals that the mass transfer rate causes velocity fluctuations at the interface, affecting the condensation mass transfer rate.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Iman Shiryanpour, Norollah Kasiri-Bidhendi
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Thermodynamics
N. Khalili, N. Kasiri, J. Ivakpour, A. Khalili-Garakani, M. H. Khanof
Article
Engineering, Environmental
Amir Hossein Behroozi, Norollah Kasiri, Toraj Mohammadi
JOURNAL OF WATER PROCESS ENGINEERING
(2019)
Article
Computer Science, Interdisciplinary Applications
Amirhossein Khalili-Garakani, Norollah Kasiri, Javad Ivakpour
COMPUTERS & CHEMICAL ENGINEERING
(2020)
Article
Energy & Fuels
Amin Tamuzi, Norollah Kasiri, Amirhossein Khalili-Garakani
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Thermodynamics
Taraneh Sadat Janfada, Holger Class, Norollah Kasiri, Mohammad Reza Dehghani
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Engineering, Environmental
Zahra Shabani, Mohammad Kahrizi, Toraj Mohammadi, Norollah Kasiri, Soleyman Sahebi
Summary: A novel low-cost PVC membrane was synthesized and modified with polydopamine for forward osmosis applications. By adjusting polymer concentration and dopamine coating time, the membrane achieved optimal water flux and reverse salt flux. Experimental results were validated by computational fluid dynamics model, providing a new approach for FO membrane fabrication.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Thermodynamics
Sepideh Roshdi, Norollah Kasiri
Summary: The performance of liquid-liquid extraction systems can be accurately predicted by using response surface methodology to study the effects of parameters. Terminal velocity, aspect ratio, and extraction fraction are important variables that influence the system performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Elham HajiAghaZadeh Louhi, Norollah Kasiri, Amirhossein Khalili-Garakani, Mohammad Heydari-Fard, Javad Ivakpour
Summary: The study aimed to optimize the distillation column configuration for GTL distillation unit and developed distillation simulation code based on inside-out algorithm and rigorous method. Genetic algorithm was used to minimize the hybrid TAC function. Results showed that direct configuration performed the best overall evaluation and reduced operating costs by 26%.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Zahra Shabani, Toraj Mohammadi, Norollah Kasiri, Soleyman Sahebi
Summary: This study proposes a facile approach for fabricating a hydrophilic and high-flux TFC membrane. By adjusting the dopamine (DA) concentration and co-deposition time, membranes with high water flux and acceptable reverse salt flux were achieved. Moreover, the optimum membranes exhibited excellent performance in seawater desalination test.
Article
Engineering, Chemical
Zahra Shabani, Toraj Mohammadi, Norollah Kasiri, Soleyman Sahebi
Summary: In this study, UiO-66-NH2 metal-organic frameworks (MOFs) were modified using a mussel-inspired approach to synthesize polydopamine (PDA)-MOF hybrid nanoparticles (NPs), which were then embedded within a polyamide (PA) layer to fabricate thin-film nanocomposite (TFN) membranes for desalination and heavy metal removal. The modified membranes demonstrated enhanced water flux and selectivity due to the establishment of extra water channels and improvements in hydrophilicity.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Mahya Nezhadfard, Amin Tamuzi, Amirhossein Khalili-Garakani, Norollah Kasiri
Summary: This study presents a new version of the Reaction/Distillation Matrix algorithm, which generates attractive reactive distillation configurations and prevents the loss of unreacted feed components. The algorithm was evaluated using case studies on cumene and dimethyl ether production, showing lower cost compared to conventional processes.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Sepideh Roshdi, Norollah Kasiri, Javad Ivakpour, Seyed Hassan Hashemabadi
Summary: This study numerically investigates the effect of open hole area (OHA) on the performance of distillation trays. The results show that increasing OHA leads to an increase in froth density, clear liquid height, and wet pressure drop, while reducing froth height. The efficiency and entrainment values of different trays with varying OHAs are compared using Fr number and air dynamic pressure, and the tray with 14% OHA is found to have the lowest values. Pure hydrodynamic analysis can be used to qualitatively study the effects of geometric changes on entrainment and efficiency.
Article
Chemistry, Multidisciplinary
Taraneh Sadat Janfada, Norollah Kasiri, Mohammad Reza Dehghani
Summary: This research investigates the phenomenon of direct-contact condensation in porous media using computational fluid dynamics. A new combined model is developed to consider steam condensation in saturated porous media systems, using the direct contact condensation model and Navier-Stokes equations. The model results are in good agreement with experimental and simulation results, predicting steam saturation content and temperature distributions over time.
IRANIAN JOURNAL OF CHEMISTRY & CHEMICAL ENGINEERING-INTERNATIONAL ENGLISH EDITION
(2022)
Article
Engineering, Environmental
Mohammad Mirzaei, Toraj Mohammadi, Norollah Kasiri, Maryam Ahmadzadeh Tofighy
Summary: In this study, magnetized GO/Fe3O4/PES membrane exhibited superior performance over conventional membranes, with higher permeance, lower water contact angle, high rejection towards proteins, high pure water flux, and lower fouling rate. The magnetized membrane showed significant enhancement in performance compared to the regular membrane, making it suitable as a support layer for high-quality nanofiltration and reverse osmosis membranes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)