Article
Environmental Sciences
Shu Chen, Rui Liu, Zeyuan Kuai, Xuezhi Li, Shanshan Lian, Donglin Jiang, Jianfeng Tang, Ling Li, Ruoxi Wu, Chang Peng
Summary: A novel BaSnO3/PDDA/MXene (BSO/P/MX) nanocomposite photocatalyst was synthesized through electrostatic self-assembly method for efficient removal of toxic organic pollutants from aqueous solutions. The nanocomposite exhibited excellent catalytic activity towards the photodegradation of 4-nitrophenol, achieving a high degradation rate and rate constant under UV light irradiation.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Azam Sobhani, Masoud Salavati-Niasari
Summary: This review investigates hydrothermal synthesis of metal selenides and diselenides, discussing their structures, applications, and formation mechanisms, as well as strategies for developing various metal selenides. Over 50 hydrothermal methods for synthesizing metal selenides are discussed, along with the investigation of the photocatalytic activities of these compounds.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zaid Hamzah Abdulhusain, Hassan Abbas Alshamsi, Masoud Salavati-Niasari
Summary: Ternary nanocomposites of Ag-ZnO-rGO were prepared and optimized for photocatalytic performance. The concentration of dye and pH of solution were found to affect the photocatalytic efficiency. Additionally, the silver content in the composite also influenced the photocatalytic yield, with an ideal efficiency of 98.92%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
Shima Shahi, Samira Saeednia, Parvaneh Iranmanesh, Mehdi Hatefi Ardakani
Summary: In this study, copper sulfide and zinc sulfide nanostructures were synthesized using a solvo/hydrothermal method and a thio Schiff base ligand. The effects of different synthesis parameters on the morphology of the products were investigated, and the structural aspects and optical properties of the samples were characterized using various analytical techniques. The photocatalytic ability of the synthesized sulfides was explored by studying the color removal of methylene blue under ultraviolet light irradiation.
Article
Chemistry, Inorganic & Nuclear
Xinlin Wang, Rudong Zhu, Xiangkui Wang, Fengjiao Liu, Yan Gao, Rongfeng Guan, Yalei Chen
Summary: This study investigates the application of metal organic frameworks (MOFs) doped with carbon dots in fluorescence detection. CDs@Eu-MOF/PVDF thin films were prepared through a simple solvothermal method, carbon dots modification, and in-situ growth process. The structure and morphology of the film were characterized using XRD, SEM, FT-IR, and XPS. The results demonstrate that CDs@Eu-MOFs membrane exhibits strong red fluorescence, good stability in methanol solvent, and high selectivity and sensitivity to nitrobenzene and 4-nitrophenol. The CDs@Eu-MOFs/PVDF film material can be utilized for detecting nitrobenzene and 4-nitrophenol in both methanol solvent and gaseous state, with detection limits of 0.2807 mg/L and 0.0168 mg/L in liquid, and 0.346 mg/L and 0.0136 mg/L in gaseous state.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Dong Liang, Xiaoyu Zhang, Yanle Li, Yumiao Zhou, Mengyu Ren, Xiaoyue Zhang, Yongxiang Li, Na Zhu
Summary: An energy-saving and friendly process was used to enhance the photocatalytic ability of the Ag/g-C3N4 photocatalyst for the ipso-nitration of bromophenols and nitrite. The presence of Ag nanoparticles on the surface of g-C3N4 was confirmed using SEM, TEM, and XRD, and their role in improving the photocatalytic ability was demonstrated through UV-vis, PL spectra, and photoelectronic analysis. The regioselective conversion of bromophenols was found to be influenced by their substituents, with fluoro-, chloro-, and bromo-substituted bromophenols showing higher nucleophilic potential. The photo-generated superoxide and active holes were identified as crucial in the photo-catalytic nitration process, leading to the formation of center dot NO2 radicals via the peroxynitrite pathway. The electrostatic potentials of the bromophenols were calculated to explain the distribution of photo-driven nitration products.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Engineering, Environmental
Atul Verma, Sanath Kumar, Yen-Pei Fu
Summary: The study synthesized a bi-functional hybrid material and investigated its potential applications in photocatalysis and electrochemical sensing. The 2D-ternary hybrid showed significant activity in photocatalytic degradation and promising sensing properties towards 4-nitrophenol, demonstrating its potential application in both fields.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Sangamithra Nehru, Sharmiladevi Ramamoorthy, Chandran Murugan, Anandhakumar Sundaramurthy
Summary: A simple and one-step hydrothermal method was developed to synthesize highly active catalytic Cu2O microcubes, and their catalytic activity for converting p-nitrophenol into p-aminophenol was investigated. The results showed that the formed Cu2O microcubes exhibited enhanced catalytic activity, and the {110} and {111} facets were identified as the predominant active sites. The positive charge resulted from the dangling Cu atoms on the {110} and {111} facets enhanced the adsorption of hydride ions.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Hafiz Muhammad Tahir Farid, Reem Altuijri, Lamia Abu El Maati, Ahmed Hussain Jawhari
Summary: In recent years, semiconductor-based photocatalysis has been studied for its potential in solving the energy crisis and environmental degradation. This study focuses on the synthesis of MnS/g-C3N4 for the mineralization of methylene blue (MB) using various analytical techniques. The fabricated nanocomposite demonstrates a higher photocatalytic efficiency compared to MnS and g-C3N4, thanks to the dispersion of nanoparticles on the graphitic sheet. This nanocomposite holds promise for future applications in water-related issues and environmental concerns.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Elvan Hasanoglu Ozkan
Summary: In this study, zinc-oxides with three different morphologies were synthesized using the hydrothermal method. The synthesized products were characterized using EDX, SEM, XRD, FT-IR, and BET analysis. It was found that the ZnO-2 microparticles had a significantly higher surface area compared to previous studies. The catalytic performance of these zinc-oxides was evaluated for the reduction of 4-NP, a hazardous compound released in wastewater, and it was observed that the morphology and surface area of the zinc-oxide microparticles affected the reduction efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Biotechnology & Applied Microbiology
Mayra A. Alvarez Lemus, Ariana Lizbeth Jimenez Rodriguez, Cinthia Garcia Mendoza, Ruth Lezama Garcia, David S. Garcia Zaleta, Dora M. Frias Marquez, Patricia Quintana Owen, Rosendo Lopez Gonzalez
Summary: In this study, the effect of nickel on the photocatalytic properties of TiO2 nanostructures was investigated. The obtained powders were thermally treated and characterized. The Ni/TiO2-HT-400 sample showed high efficiency in the photoreduction of 4-nitrophenol, with a decrease in efficiency over subsequent cycles. The increase in photocatalytic reduction was attributed to the presence of oxygen vacancies and reduced electron-hole recombination.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yunlei Ma, Yunjing Zhu, Haopeng Yue, Guojian Jiang, Dandan Wu
Summary: In this study, a Co3O4-CuO nanocomposite catalyst dispersed on mesoporous silica nanospheres (MSN) was successfully synthesized via a hydrothermal method. The catalyst showed high dispersibility and a large specific surface area, enabling efficient contact with catalytic substrates. The catalytic reduction of 4-nitrophenol to 4-aminophenol was studied, and the nanocomposite catalyst exhibited excellent performance with complete conversion in 200 seconds.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Environmental
Y. M. Hunge, A. A. Yadav, Seok-Won Kang, Hyunmin Kim, Akira Fujishima, Chiaki Terashima
Summary: The study focuses on the catalytic reduction of nitroaromatic compounds in wastewater using nanostructured materials, specifically a ternary spinal nickel cobalt oxide electrode, which also has applications in supercapacitors. The synthesized nanoflakes-like NiCo2O4 show efficient catalytic activity and high specific capacitance for energy storage, particularly at higher synthesis temperatures like 120 degrees C. Increasing the concentration of sodium borohydride leads to improved catalytic efficiency in reducing 4-nitrophenol.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Mohammad Ahmadi, Mehrdad Moslemzadeh, Azra Naderi, Milad Zehtab Salmasi, Motahareh Harati, Roshanak Rezaei Kalantary, Babak Kakavandi
Summary: A CoFe2O4-ZnO (CFZ) composite was prepared and evaluated for its efficiency in degrading nitrobenzene (NB) under UV light. CFZ showed the highest efficiency in NB decontamination, illustrating a strong synergy effect between CF and ZnO. Intermediates and possible decomposition pathway of NB were analyzed.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Chemistry, Physical
Xi Zhu, Ziwei Pan, Wenqiang Lu
Summary: Ti3C2Tx nanosheets are used as a template for growing CuS/NiS2/Ti3C2Tx hierarchical heterostructure, which provides enlarged active sites for photocatalytic processes. The heterostructure exhibits increased hydrogen generation rate and retention, attributed to improved conductivity and efficient separation of electrons and holes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
K. Karthikeyan, Senthil Kumar Kandasamy, P. Saravanan, Abdullah Alodhayb
Summary: The objective of this study is to optimize the performance of a micromixer device through design, simulation, and analysis of input parameters such as device structure, flow rate, and diffusion coefficient, and output parameters including concentration, velocity, pressure, and time domain. Fuzzy logic analysis was used to gather and optimize the data, and the results showed that the herringbone shape with obstacles micromixer achieved 100% mixing efficiency within a short time and low pressure drop.
Article
Chemistry, Physical
Sofia Jeniffer Rajasekaran, Andrews Nirmala Grace, George Jacob, Abdullah Alodhayb, Saravanan Pandiaraj, Vimala Raghavan
Summary: This study focuses on the synthesis of biomass derived activated carbon and its electrochemical behavior in different electrolytes. The specific capacitance, energy density, and power density of the synthesized activated carbon material were characterized in various aqueous electrolytes. The results showed that the RCS-AC material exhibited excellent electrochemical performance in 3 M KOH, with a specific capacitance of 137 F g(-1), energy density of 18.2 W hkg(-1), and power density of 663.4 W kg(-1). The stability of the capacitance in 3 M KOH was maintained at 97.2% after 5000 continuous charge and discharge cycles, indicating long-term stability. The study concluded that the synthesized RCS-derived activated carbon has promising commercial applications in energy storage.
Article
Materials Science, Multidisciplinary
Parthiban Venkatesan, Rajakumar Govindasamy, Govindasami Periyasami, Mostafizur Rahaman, Saravanan Pandiaraj, Muthu Thiruvengadam, Natesan Thirumalaivasan, Shu-Pao Wu
Summary: In this study, carbon dots (MCDs) were synthesized from mushrooms using hydrothermal method. The MCDs exhibited bright blue fluorescence, exceptional biocompatibility, high quantum yield, and efficient biolabeling ability. They also showed extraordinary specificity towards HOCl and could detect it in deionized water with a detection limit of 3.38 nM. Furthermore, the MCDs had potent antioxidant properties, low cytotoxicity, and high cell permeability, making them highly useful in various biological applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Biotechnology & Applied Microbiology
Shitharth Selvarajan, Hariprasath Manoharan, Celestine Iwendi, Rakan A. Alsowail, Saravanan Pandiaraj
Summary: The purpose of this study is to prevent severe health issues in elderly people by observing the internal digestive systems. To achieve this, an advanced system with wireless sensor setups and parametric monitoring system integrated with neural networks is proposed. The results of four different cases show that the proposed approach can reduce data loss to an optimized value of 1.39%.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Ghada Ahmed Khouqeer, S. Suganthi, Nadyah Alanazi, Abdullah Alodhayb, Muthumareeswaran Muthuramamoorthy, Saravanan Pandiaraj
Summary: This paper presents a design of a MEMS capacitive comb accelerometer for seismology application, using the COMSOL Multiphysics platform. The seismic device has a larger frequency band compared to traditional geophones and seismographs. The study measures amplitudes and frequencies of vibrations and compares the results for perforated mass and solid proof mass. The displacement sensitivity and capacitive sensitivity of the accelerometer are calculated.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Ravuri Syamsai, Andrews Nirmala Grace, Ganesan Anandha Babu, Kamala Bharathi Karuppanan, Senthil Kumar Eswaran, Mani Navaneethan
Summary: Double-ordered titanium tantalum carbide MXene nanosheets were successfully synthesized with a hexagonal crystal structure and 2D layered morphology. HF etching effectively removed the intermediate aluminum layers. The synthesized MXenes demonstrated improved thermal stability and high electrical conductivity, with a decrease in thermal diffusivity with temperature. The electrochemical properties showed that the double-ordered MXene nanosheets had a specific capacitance of around 200 F/g, with a capacitance retention of 80% over 30 days in 1 M H2SO4.
ACS APPLIED NANO MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Saheb Ali, Kattakgoundar Govindaraj Sudha, Natesan Thirumalaivasan, Maqusood Ahamed, Saravanan Pandiaraj, Vijayarangan Devi Rajeswari, Yamini Vinayagam, Muthu Thiruvengadam, Rajakumar Govindasamy
Summary: This study focused on the synthesis of magnesium oxide (MgO) nanoparticles (NPs) using Abrus precatorius L. bark extract through the green chemistry method. Characterization techniques such as XRD, FTIR, SEM, TEM, and UV-visible analysis were used to confirm the synthesis of MgO NPs. The synthesized MgO NPs exhibited small particle size and specific surface area. The study also assessed the efficacy of MgO NPs in dye degradation, antioxidant activity, and toxicity using zebrafish embryos and human melanoma cancer cells (A375).
BIOENGINEERING-BASEL
(2023)
Article
Agricultural Engineering
Rasiravathanahalli Kaveriyappan Govindarajan, Rekha Thiruvengadam, Amer M. Alanazi, Saravanan Pandiaraj, Krishnamurthy Mathivanan, Muthu Thiruvengadam, Jin Hee Kim
Summary: The present study investigated the impact of photosynthetically active radiation (PAR), culture temperature, and urea addition on the biomass, total lipid, lipidomic profile, and fatty acid productivity in Scenedesmus obliquus (S. obliquus) and Chlorella vulgaris (C. vulgaris) for sustainable biodiesels. Results showed that both S. obliquus and C. vulgaris exhibited high cell densities and lipid contents. The optimal parameters for biomass yields were a PAR of 60 μmol/m2/sec and a temperature of 27 degrees Celsius. Urea deprivation and a PAR of 60 μmol/m2/sec resulted in the highest proportions of unsaturated fatty acids in both species.
BIOMASS & BIOENERGY
(2023)
Article
Environmental Sciences
Sanjeevamuthu Suganthi, Shanmugam Vignesh, Vairamuthu Raj, Salim Manoharadas, Saravanan Pandiaraj, Haekyoung Kim
Summary: In this study, novel Z-scheme V2O5/g-C3N4 photocatalytic composites were prepared through simple hydrothermal processes. These composites showed significantly improved efficiency and reaction rate for the degradation of methylene blue compared to pristine GCN catalyst. The enhanced activity was attributed to the synergistic interfacial construction of the Z-scheme heterojunctions among V2O5 and GCN, which improved separation/transfer and enhanced visible-light utilization.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Kumar Manimaran, Dede Heri Yuli Yanto, Chinnaperumal Kamaraj, Kumar Selvaraj, Saravanan Pandiaraj, Abdallah M. Elgorban, Shanmugam Vignesh, Haekyoung Kim
Summary: The current study developed a unique biomaterial, CuONPs, that can combat oxidative stress and microbial infections without harm. The synthesized CuONPs using Pleurotus mushroom extract are easy to make, environmentally friendly, long-lasting, and non-toxic. Characterization analysis showed a sharp absorbance peak at 250nm and a spherical structure with an average particle size of 20nm.
ENVIRONMENTAL RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Nadyah Alanazi, Tamil Selvi Gopal, Muthumareeswaran Muthuramamoorthy, Amani Ali E. Alobaidi, Reem Abdullah Alsaigh, Mohammed Hamad Aldosary, Saravanan Pandiaraj, Maram Almutairi, Andrews Nirmala Grace, Abdullah Alodhayb
Summary: Fine-tuning the morphology of nanostructures from 2D to 3D through structural engineering improves biosensing. In this study, a 3D ternary composite (MXene graphene aerogel-Cu2O composite) was synthesized by hydrothermal process and coprecipitation method. The composite exhibited a low crystallite size, spherical-shaped Cu2O, and a large surface area with a porous structure. A sensing electrode was fabricated and showed high sensitivities, wide linear ranges, low detection limit, and good stability, selectivity, and reproducibility. The 3D network of MXene and rGO nanosheets enhances charge transfer and promotes the sensing activity of nonenzymatic glucose sensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Environmental Sciences
Vijayakumar Rajendran, Muthuraman Ponrajan Vikram, Sung Chul Kim, Paride Gullo, Abdullah Alodhayb, Saravanan Pandiaraj, Rajendran Prabakaran
Summary: This study aims to enhance the performance of a solar air heater by introducing broken V-ribs on the absorber plate. The results show that the unit with broken V-ribs has lower absorber and glass plate temperatures compared to the unit with a conventional flat absorber plate. The VSAH also exhibits higher power and thermal efficiency, as well as lower top surface heat losses.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Hemalatha Manivannan, Anikesh Krishnamurthy, Rahul Macherlla, Siva Chidambaram, Saravanan Pandiaraj, Muthumareeswaran Muthuramamoorthy, Selvarajan Ethiraj, G. Mohan Kumar
Summary: The current study describes the fabrication of a nano-catalyst by embedding magnetic nanoparticles in a silica shell and functionalizing it with sulfonyl groups. The characteristics and performance of the nano-catalyst were investigated using various analysis methods. The study also found that the catalyst could efficiently convert banana peel waste into reducing sugar, and the catalyst could be reused. Furthermore, the fermentation efficiency of banana peel hydrolysate reached 83%.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Chemistry, Physical
Adhikesavan Harikrishnan, Vijaykumar Veena, Roshini Kancharla, Sakshi Chavan, Jothi Ramalingam Rajabathar, Hamad Al-Lohedan, Saravanan Pandiaraj, Ponmurugan Karuppiah, Selvaraj Arokiyaraj
Summary: The study identified neoandrographolide from Andrographis paniculata as a potential anticancer molecule that exhibits a strong interaction with PI3K, a protein associated with breast cancer.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
