Article
Engineering, Chemical
Imad Eddine Kimi, Mohamed Miloudi, Seddik Touhami, Djamel-Eddine Fekir, Amar Tilmatine
Summary: The study aims to investigate a modified FFTES configuration with rotating cylindrical electrodes to overcome the particle impacting effect, leading to a significant increase in purity and recovery rates of the separator.
PARTICULATE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hongshen Zhang, Xiang Gao, Shengqi Xu
Summary: This paper aims to achieve high value-added reuse of waste vehicle polymers to alleviate resource shortage and environmental degradation. The study focuses on the clean and efficient separation of mixed polymers, using polyamide (PA)/polypropylene (PP)/acrylonitrile-butadiene-styrene (ABS) and polyethylene (PE)/PP/polyvinylchloride (PVC) as research objects. The double-stage device for tribo-aero-electrostatic separation is designed, and tribo-electrostatic separation experiments are conducted based on determined parameters, achieving high purities of separated particles. This research provides valuable reference for the two-stage tribo-electrostatic separation of vehicle polymer mixed particles.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Hyun Sik Choi, Jungho Hwang
Summary: This study successfully removed submicron particles using electrical agglomeration in an AC electric field before collection in an ESP, confirming the effectiveness of this method.
Article
Engineering, Chemical
Jingsi Yang, Venkatesh Meda, Lifeng Zhang, Michael Nickerson
Summary: The urgent need for sustainable sources of nutrients due to the worldwide pressure on food consumption has led to the development of the tribo-electrostatic separation (T-ES) technique. This technique, which charges particles through physical contact and separates them in an electric field, has shown promise in fractionation of protein and starch in various crops. However, challenges and gaps in the understanding of the charging mechanism and conflicting conclusions in published papers highlight the need for further research.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Energy & Fuels
Wieslaw Lyskawinski, Mariusz Baranski, Cezary Jedryczka, Jacek Mikolajewicz, Roman Regulski, Dariusz Sedziak, Krzysztof Netter, Dominik Rybarczyk, Dorota Czarnecka-Komorowska, Mateusz Barczewski
Summary: This study focused on investigating the impact of specific parameters during the tribocharging process of PET and PE-HD plastics on accumulated electric charge and electrostatic separation effectiveness. Through experimental examination of container material, tribocharging time, and airflow intensity, it was found that surface charge accumulation on polymer particles and successful separation could be achieved effectively. The proposed approach's effectiveness was demonstrated through empirical validation based on test results.
Article
Engineering, Chemical
Chunlei Wang, Guodong Liu, Zhanhu Zhai, Xinyao Guo, Yao Wu
Summary: Models describing particle triboelectric charging and electrostatic interactions were added to the Computational Fluid Dynamic coupled Discrete Element Method (CFD-DEM) for numerical simulations. It was found that as particle size decreases, bipolar charged particles exhibit a chaining stage and an agglomerating stage, with different interactions between triboelectric charging and fluidization. The effect of the wall is positively correlated to the ratio of the particle-wall collision rate to the total particle collision rate, and the fluidization conditions of particles affect the charging process via this correlation. This work contributes to a better understanding of the interaction between triboelectric charging and particle fluidization, and helps optimize fluidized bed design and conditions.
Article
Food Science & Technology
Yue Qi, Xinglian Xu, Hualin Dong, Zongyun Yang, Peng Wang
Summary: The study found that carnosine improves the dispersibility of myosin under low-salt conditions by increasing solubility, turbidity, and decreasing particle size and aggregate mass. Electrostatic interaction is the main force between carnosine and myosin. However, excessive carnosine has a negative effect on the long-term stability of the protein solution, possibly due to increased hydrophobicity of the myosin head.
Article
Engineering, Chemical
Jamaka Thomas, Sama Ghadiri Gargari, Solmaz Tabtabaei
Summary: A tribo-electrostatic separation method was developed for producing protein concentrates from yellow pea flour. A full factorial experiment and a multiple linear regression model were used to assess the impact of operating factors on protein content, separation efficiency, and yield. The results showed that airflow rate, milling type, and screen size significantly affected protein content, while plate voltage mainly influenced protein separation efficiency. The optimal parameters were laminar flow at +/- 6.5 kV electric field strength using pin-milled flour at the smallest tested screen size, resulting in a protein content of 57.1% and separation efficiency of 62%. Theoretical predictions matched experimental data.
Article
Food Science & Technology
Dinara Konakbayeva, Botagoz Kuspangaliyeva, Amin Reza Rajabzadeh, Solmaz Tabtabaei
Summary: The endosperm-enriched oat fraction was processed using a dry and chemical-free tribo-electrostatic separation method to enrich protein. The effects of airflow rate and electric field strength on protein enrichment were assessed. Higher protein enrichments were observed at a laminar airflow rate and higher plate voltages. The NCP fraction showed the highest protein content and particle size, while the PCP and CB fractions were depleted in protein and bran particles.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Javier Perez-Vaquero, Johann Landauer, Petra Foerst
Summary: This study investigates the tribo-electrostatic separation of seven powder materials in a free-fall separator. The results show that the charging behavior of materials determines their proportion on the separated fractions. The study supports the concept of a triboelectric series, where materials located farther apart exhibit larger differences in proportion on each electrode.
JOURNAL OF ELECTROSTATICS
(2023)
Article
Chemistry, Applied
Shengzhe Jia, Xuxing Wan, Tuo Yao, Shengzheng Guo, Zhenguo Gao, Jingkang Wang Junbo Gong
Summary: This study utilized solution crystallization in food engineering to produce a high-purity vitamin intermediate, optimizing its crystal morphology and particle size distribution. Model analysis revealed the significant impact of temperature on separation performance. Under optimal conditions, the product purity achieved exceeded 99.5%, meeting the requirements for subsequent synthesis. High crystallization temperature reduced agglomeration and enhanced particle liquidity. Introducing temperature cycling and gassing crystallization strategies proved beneficial for optimizing particle size.
Article
Engineering, Chemical
Qun Zhou, Cai Liang, Jiawei Hu, Xiaoping Chen, Jiliang Ma
Summary: Size-induced particle segregation during the silo filling process greatly changes the electrostatic charge distribution, influencing the occurrence of the incendiary electrostatic discharge. The study found that the enhancement effect of particle segregation on electrostatic discharge is stronger when the volume fraction of small particles is less than 75%.
Article
Environmental Sciences
Shiyi Zhao, Shanshan Liu, Fei Wang, Xingwen Lu, Zhe Li
Summary: The study investigated the sorption behavior of F-53B on four types of nanomaterials and concluded that surface modified nanoclay (SMNC) was the most effective for removing F-53B from aquatic environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Multidisciplinary
Ahlem Benabderrahmane, Csaba Dani, Karim Medles, Thami Zeghloul, Farida Tomasella, Mihai Lungu, Lucien Dascalescu, Arnaud Parenty
Summary: The aim of this study was to investigate the impact of storage conditions, specifically the relative humidity (RH) of ambient air, on the triboelectric charging and electrostatic separation of granular insulating mixtures containing brominated flame retardants (BFR). Two model granular mixtures consisting of Polypropylene (PP) / Polyethylene (PE) particles, either BFR-free or containing 4.7% of BFR, were used for the experiment. The results showed that the best separation results were obtained for mixtures stored at controlled humidity of 50% or under ambient conditions RH55% to 58%, at temperatures ranging between 18 degrees C and 22 degrees C.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Mohamed Maammar, Thami Zeghloul, Wessim Aksa, Seddik Touhami, Imed Achouri, Lucian Dascalescu
Summary: This paper studies the influence of different factors on the trajectories of charged insulating particles in an electrostatic separator, and develops a numerical model based on the principles of dynamics for simulation. Experimental results validate the accuracy of the numerical model.
JOURNAL OF ELECTROSTATICS
(2022)
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)