Article
Energy & Fuels
Anahita Sharifi, Zohreh Hamidi-Esfahani, Hassan Ahmadi Gavlighi, Hamed Saberian
Summary: This study investigated the optimal conditions for extracting pomegranate pectin using the ohmic heating method, and compared its properties with pectin extracted using the conventional acidic method. The findings showed that ohmic heating extraction resulted in significantly higher galacturonic acid content in the pectin.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Engineering, Electrical & Electronic
Seyed Faraz Jafari, Reza Sarraf Shirazi, Gholamreza Moradi, Alain Sibille, Joe Wiart
Summary: This article presents a novel technique for noninvasive assessment of absorbed power density (APD) by considering antenna-human body coupling. The technique solves the electric field integral equation using spatial dyadic Green's functions (DGFs) and method of moments (MoMs) to reconstruct the equivalent currents, which are then used to assess APD beneath the air-phantom interface. The proposed technique shows promising results, with reconstruction errors below 11.1% for maximum spatially averaged power density at 60 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Physical
K. V. Vamsi, S. Karthikeyan
Summary: This study focused on the impact of planar fault energies and elastic anisotropy on deformation modes and yield strength anomaly in superalloys. It was found that the addition of alloying elements in Ni3Al(1-x)Cx had a non-monotonic effect on fault energies and elastic moduli. Experimental results confirmed the significant influence of alloying elements on yield strength anomaly.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Zixuan Feng, Jianhua Wang, Yinliang Diao
Summary: This study showed the increase of absorbed/epithelial power density (APD/EPD) due to antenna/body interaction using full-wave simulations, and proposed a hybrid method combining spherical near-field measurement and numerical simulation to assess the exposure dose in human body. The proposed method gives an accurate estimation of the upper bound of the area-averaged APD with relative differences < 28% compared to full-wave simulated results at 30 GHz for various antenna arrays. It eliminates the need for specific measurement equipment and can be utilized as an efficient method for electromagnetic safety assessment.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Agriculture, Multidisciplinary
Li Guang-hao, Cheng Qian, Li Long, Lu Da-lei, Lu Wei-ping
Summary: The study found that planting maize at a density of 7.5 plants/m² with slow-released fertilizer can lead to highest grain yield and nutrient use efficiency over two years of field experiments.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2021)
Article
Computer Science, Information Systems
Sinwoo Jeong, Soobum Lee, Honghee Yoo
Summary: This study investigates the design scalability of a Gamma-shaped piezoelectric energy harvester using the generalized classical Ritz method and a differential evolution algorithm. The accuracy of numerical simulation is experimentally validated, and a power maximization design study is conducted to determine the optimal design parameters. The optimized Gamma EH achieves the highest normalized power density among reviewed PE harvesters, indicating its superior performance in power output.
Article
Chemistry, Physical
Uzair Ahmed, Mohsan Jelani, Najam Ul Hassan, Muhammad Naeem, Tahir Zaman, Shahbaz Ahmad
Summary: This study investigates the cluster dynamics of gold and copper ions in a low energy range through bombardment of gold and copper targets with low energy cesium ions. The results show that the sputtering behavior of copper remains constant, while the cluster sputtering probability of gold clusters slightly increases with an increase in incident ion energy.
SURFACE REVIEW AND LETTERS
(2022)
Article
Thermodynamics
Tom Sawai, Kenji Yokota, Nami Tagami-Kanada
Summary: This study investigates a generalized higher heating value (HHV) estimation method for torrefied woody biomass, using the pyrolysis kinetics of cellulose, lignin, and xylan as primary constituents. Experimental correlations of HHV for torrefied constituent polymers are proposed, enabling the estimation of HHV for torrefied woody biomass based on the mass fractions of the constituent polymers. The method shows approximately 10% accuracy in evaluating HHV, although there is a slight underestimation.
JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Arevik Vardanyan, Narine Vardanyan, Mohamed Aatach, Pierre Malavasi, Stoyan Gaydardzhiev
Summary: The effect of different process parameters on the bioleaching of metals from end-of-life printed circuit boards (PCBs) was investigated. The results showed that the concentration of ferric iron and pH had a significant influence on the degree of metal dissolution. The study found that under specific conditions, a substantial amount of copper, zinc, and nickel could be extracted from the PCBs. These findings provide possibilities for further research and suggest that bioleaching could be an economically and environmentally friendly technology for urban mining of non-ferrous metals.
Article
Computer Science, Information Systems
Kevin R. Moon, Kumar Sricharan, Alfred O. Hero
Summary: This passage introduces the concept and application of mutual information, and proposes an ensemble estimator called GENIE for estimating mutual information measures between continuous and mixed variables. The estimator can achieve a parametric mean squared error convergence rate of 1/N and is suitable for complex scenarios commonly encountered in practical applications.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Kento Suzuki, Tomohiko Mitani, Naoki Shinohara
Summary: The study aims to achieve uniform microwave heating over a large area by utilizing the Orbital Angular Momentum (OAM) mode irradiation pattern. The results demonstrate that the synthesized power density distribution can be made uniform by adjusting the weights appropriately. The method using OAM modes is effective for achieving uniform microwave heating over a large area.
2022 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)
(2022)
Article
Environmental Sciences
Tarik Ouchbani, Mohammed Bennis, Anass Khaili, Mohamed Zahar, Mitsutoshi Nakajima
Summary: The heating ring temperature of the extraction cylinder significantly affects the oil extraction yield, with optimal results achieved between 80-120 degrees Celsius. Lower temperatures caused difficulties in the extraction process. Monitoring temperatures during extraction showed that extracted oil remained lower in temperature than the heating ring, yet all oils extracted were of extra virgin grade.
EURO-MEDITERRANEAN JOURNAL FOR ENVIRONMENTAL INTEGRATION
(2021)
Article
Physics, Condensed Matter
G. G. Bondarenko, V. I. Kristya, Myo Thi Ha, M. R. Fisher
Summary: A model of glow gas discharge in the presence of a thin insulating film on the cathode is proposed, taking into account ion-induced secondary electron emission and thermal-field emission of electrons. The study shows that the thermal-field mechanism can significantly influence the emission properties and discharge characteristics at high cathode temperatures.
JOURNAL OF SURFACE INVESTIGATION
(2022)
Article
Engineering, Chemical
Mohamad Hamdi Zainal-Abidin, Maan Hayyan, Gek Cheng Ngoh, Won Fen Wong
CHEMICAL ENGINEERING SCIENCE
(2019)
Article
Energy & Fuels
Li Wan Yoon, Gek Cheng Ngoh, Adeline Seak May Chua, Muhamad Fazly Abdul Patah, Wen Hui Teoh
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2019)
Article
Nanoscience & Nanotechnology
Mohamad Hamdi Zainal-Abidin, Maan Hayyan, Gek Cheng Ngoh, Won Fen Wong, Chung Yeng Looi
APPLIED NANOSCIENCE
(2020)
Review
Agricultural Engineering
Yee Tong Tan, Adeline Seak May Chua, Gek Cheng Ngoh
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Seow Wah How, Adeline Seak May Chua, Gek Cheng Ngoh, Tadashi Nittami, Thomas P. Curtis
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Engineering, Environmental
Seow Wah How, Jia Huey Sin, Sharon Ying Ying Wong, Pek Boon Lim, Alijah Mohd Aris, Gek Cheng Ngoh, Tadashi Shoji, Thomas P. Curtis, Adeline Seak May Chua
WATER SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Mohamad Hamdi Zainal-Abidin, Maan Hayyan, Gek Cheng Ngoh, Won Fen Wong
Article
Agricultural Engineering
Yee Tong Tan, Adeline Seak May Chua, Gek Cheng Ngoh
INDUSTRIAL CROPS AND PRODUCTS
(2020)
Article
Polymer Science
Shiou Xuan Tan, Hwai Chyuan Ong, Andri Andriyana, Steven Lim, Yean Ling Pang, Fitranto Kusumo, Gek Cheng Ngoh
Summary: This study presents the preparation of chitosan reinforced starch-based bioplastic film by the solution casting and evaporation method. The effects of processing parameters on mechanical properties were examined and the results showed that the chitosan-reinforced starch-based bioplastic possessed good strength, elongation, thermal stability, and water resistance. It also exhibited a higher degradation rate compared to petroleum-based plastics.
Article
Polymer Science
Shiou Xuan Tan, Andri Andriyana, Hwai Chyuan Ong, Steven Lim, Yean Ling Pang, Gek Cheng Ngoh
Summary: Petroleum-based plastics pose environmental pollution problems due to their non-biodegradable and toxic properties, but renewable and biodegradable bioplastics have the potential to replace them. The fabrication of bioplastic films requires a delicate mixture of film-forming agents, plasticizers, and solvents. Research has focused on enhancing bioplastics' performance by using environmentally friendly nanoparticles. This review paper highlights the influencing factors on the properties of starch-based bioplastics and discusses their formation mechanism.
Article
Polymer Science
Shiou Xuan Tan, Andri Andriyana, Steven Lim, Hwai Chyuan Ong, Yean Ling Pang, Gek Cheng Ngoh
Summary: This study successfully optimized the extraction yield of sago starch using ultrasound assistance, resulting in a higher purity and swelling power of the extracted starch. The starch was further transformed into a bioplastic film with good mechanical properties and water vapor permeability, demonstrating its feasibility as a bioplastic material.
Article
Engineering, Chemical
Li Wan Yoon, Ishrak Shariar Rafi, Gek Cheng Ngoh
Summary: This study investigates the potential of eliminating washing step in glucose recovery and ethanol production scheme when DES pretreatment is applied. The most suitable DES for pretreating sugarcane bagasse was found to be ChCl-MA, which resulted in high sugar recovery and low sugar loss during the process. The maximum amount of glucose recovered after 48 hours of enzymatic hydrolysis from both washed and unwashed pretreated substrate was insignificantly different, but slightly higher bioethanol was obtained from the unwashed pretreated substrate compared to the washed substrate.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Applied
Haliza Abdul Aziz, Rozita Yusoff, Ngoh Gek Cheng, Zainab Idris, Nur Aainaa Syahirah Ramli
Summary: The production cycle of heterogeneous catalyzed-transesterification for the production of esterquats precursor is considered as a cleaner and sustainable process. Reusing the catalyst reduces the formation of wastewater, consumption of toxic chemicals, and production costs.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2023)
Article
Chemistry, Physical
Wai Keng Teng, Rozita Yusoff, Mohamed Kheireddine Aroua, Gek Cheng Ngoh
Summary: Glycerol carbonate (GC) was successfully produced from industrial grade crude glycerol using calcium oxide (CaO) catalysis via microwave assisted transesterification (MAT). By optimizing reaction parameters, a high GC yield of 99.5% was achieved under specific conditions including a reaction temperature of 65 degrees C, reaction time of 3 min, and DMC/Gly molar ratio of 2.5.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Environmental Sciences
Seow Wah How, Tadashi Nittami, Gek Cheng Ngoh, Thomas P. Curtis, Adeline Seak May Chua
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)
