Article
Chemistry, Multidisciplinary
Maheshwari Zirpe, Jyotsna Thakur
Summary: The study focused on using delafossite-structured silver ferrite nanoparticles as adsorbents to remove cationic dye Basic Green-4 from aqueous solutions. The results showed that almost all dye was adsorbed within 30 minutes under the conditions of pH 8 and 20 mg nanoparticles.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Environmental Sciences
Sadaf Nikzad, Ali Akbar Amooey, Ali Alinejad-Mir
Summary: The study focused on removing diazinon from aqueous solution using a magnetic tragacanth-montmorillonite nanocomposite as an adsorbent. Various factors and adsorption models were studied, showing the Elovich kinetic model and Langmuir-Freundlich model as the most fitting ones, with the process being endothermic. The results demonstrated the nanoadsorbent's high capability in removing diazinon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Taher Selmi, Ghizlane Enaime, Aida Kesraoui, Abdelaziz Bacaoui, Mongi Seffen
Summary: This study explored the use of Agave americana fibers for the preparation of activated carbon via chemical activation with phosphoric acid, and investigated the effects of preparation conditions on the adsorption capacity towards Alpacide Yellow. The optimal conditions for enhanced properties were found to be an impregnation ratio of 40 g/1 g, impregnation time of 6 h, and carbonization temperature of 400 degrees C. Despite its lower specific surface area compared to commercial activated carbon, the prepared activated carbon exhibited higher adsorption capacity due to the presence of pores and functional groups on its surface. The adsorption process followed a fractal kinetic model, while the adsorption isotherm model was stochastic.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Hanan A. Ahmed, Mahmoud F. Mubarak
Summary: The study investigated the adsorption efficiency of CaNiFe2O4/Chitosan nanocomposite for methylene blue (MB) removal and found it to be about 88%. The highest removal efficiency was observed at 25 degrees C, 7.6 pH, and 100 mg dosage of CaNiFe2O4/Chitosan. Various equilibrium adsorption models were applied to validate the adsorption data, showing spontaneity and viability thermodynamically.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Environmental Sciences
Ana Paula Nazar De Souza, Dalber R. Sanchez, Mariella Alzamora, Marcos Vinicius Colaco, Marcelo Augusto Vieira de Souza, Jefferson Santos De Gois, Jaqueline Dias Senra, Nakedia M. F. Carvalho
Summary: Contamination of water by toxic dyes is a serious environmental problem. In this study, an environmentally safe adsorbent composed of iron oxide nanoparticles and proanthocyanidins was prepared using a green synthesis method. The adsorbent showed excellent adsorption capacity for cationic dyes and could be reused for multiple cycles without loss of efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Mohammed Benjelloun, Youssef Miyah, Gulsun Akdemir Evrendilek, Farid Zerrouq, Sanae Lairini
Summary: The increased environmental awareness and tighter regulatory standards have led various industries to seek appropriate wastewater treatment technologies for colored wastewater. This review provides detailed information on dyes, their classification, the environmental impact of water pollution, and the use of adsorption technology as a sustainable solution for dye removal. Studies evaluating the effectiveness of different adsorbents, particularly low-cost ones, in removing dyes from aqueous solutions are highlighted.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Saad, Hajira Tahir, Seher Mustafa, Osama A. Attala, Waleed A. El-Saoud, Kamal A. Attia, Wessam M. Filfilan, Jahan Zeb
Summary: A sustainable method was used to create Iron-Zinc nanocomposites with the assistance of polyvinyl alcohol, using mint leaf extract as a reductant. The addition of Poly Vinyl Alcohol (PVA) reduced the crystallite size and increased the lattice parameters. The resulting high-performance nanocomposites effectively removed malachite green dye from a simulated wastewater system, with a removal rate of 77.87% and an adsorption capacity of 92.59 mg.g(-1).
Article
Engineering, Environmental
Hajar Azad, Mohsen Mohsennia, Chun Cheng, Abbas Amini
Summary: The new PVB-PVA/SA-ε-MnO2 nanocomposite demonstrates high adsorption efficiency for Cu2+, Cd2+, and Pb2+ ions in aqueous solutions, with the ability for repeated use, mainly attributed to various physicochemical interactions such as electrostatic interactions and surface complexation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Yarui Zhou, Zilong Li, Lili Ji, Zhen Wang, Lu Cai, Jian Guo, Wendong Song, Yaning Wang, Alexander M. Piotrowski
Summary: Novel N-doped biochar (AKB) nanomaterials derived from raw kelp root exhibited excellent adsorption performance for cationic dye removal, with high specific surface area and abundant functional groups, suitable for dye wastewater treatment applications.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Ceramics
Shifa Wang, Hao Liu, Maoyuan Li, Mengjun Han, Huajing Gao, Hua Yang, Leiming Fang, Huijun Zhang, Angadi. V. Jagadeesha, S. O. Manjunatha, Chao Cai, Dengfeng Li
Summary: Various carbon-based MgAl2O4 (MAO) adsorbents were synthesized using ultrasound irradiation technology and different carbon sources. The optimal synthesis conditions were determined by studying the addition of different carbon types and mass ratios. The adsorption behavior of the carbon-based MAO adsorbents for different dyes and drugs was discussed, and various adsorption isotherm models were studied. The study demonstrated the potential of carbon-based MAO adsorbents as eco-friendly adsorbents for the removal of dyes and drugs.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Yi-Hao Chen, Po-Jung Huang
Summary: The study developed a green method for synthesizing a metal-organic framework (MOF) from waste PET bottles, combined with sono-assisted adsorption for enhanced dye removal efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Environmental Sciences
Efaq Noman, Adel Al-Gheethi, Radin Maya Saphira Radin Mohamed, Mohamed Al-Sahari, Md Sohrab Hossain, Dai-Viet N. Vo, M. Naushad
Summary: This article reviews the removal of nickel (Ni2+) ions from wastewater. Adsorption is the most commonly used method, with nanoparticles, bacterial biomass, and activated carbon from agricultural waste being the preferred adsorbents. Bacterial biomass and activated carbon exhibited high efficiency and renewable biomass sources for Ni2+ ion removal. The biosorption capacity of Ni2+ ions by bacterial biomass ranged from 5.7 to 556 mg/g, while activated carbon ranged from 5.8 to 150 mg/g. Nanocomposite adsorbents may have a biosorption capacity of up to 400 mg/g. Selective biomass adsorbents, such as tolerant bacterial cells biomass, are needed for the elimination of nickel ions.
Article
Multidisciplinary Sciences
Ali H. Jawad, Shihab Ezzuldin M. Saber, Ahmed Saud Abdulhameed, Ahlam M. Farhan, Zeid A. ALOthman, Lee D. Wilson
Summary: This research aimed to use natural Iraqi bentonite clay (NIBC) to adsorb the organic dye (methylene blue, MB) from aqueous media. Analytical methods were performed to analyze the physicochemical characteristics of NIBC. The study examined the impacts of adsorbent dosage, pH, and initial concentrations on the removal of MB. Results showed that NIBC had a maximum adsorption capacity of 256 mg/g for MB.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Environmental Sciences
Allen Rhay B. Bayantong, Yu-Jen Shih, Dennis C. Ong, Ralf Ruffel M. Abarca, Cheng-Di Dong, Mark Daniel G. de Luna
Summary: MFe2O4@GO (M = Cu, Co or Ni) synthesized via solution combustion method efficiently removes dye molecules from aqueous solutions with maximum adsorption capacities of 25.81, 50.15 and 76.34 mg g(-1) respectively. Among the graphene-metal ferrites investigated, NiFe2O4@GO exhibits the highest adsorbent performance due to its high specific surface area and presence of mesopores.
Article
Polymer Science
Somayeh Rahdar, Abbas Rahdar, Mostafa Sattari, Laleh Divband Hafshejani, Athanasia K. Tolkou, George Z. Kyzas
Summary: Dyes are hazardous industrial pollutants, and effective removal from wastewater is crucial. A BaFe12O19/CoFe2O4@PEG nanocomposite showed high efficiency in removing Acid Blue 92, with a maximum of 77.54% removal at pH 2. Adsorption isotherm and kinetic data fit well with models, especially the pseudo-second order and Freundlich isotherm models.
Article
Chemistry, Analytical
Akash Deb, Animesh Debnath, Nilanjana Bhattacharjee, Biswajit Saha
Summary: The alarming increase in water pollution caused by the disposal of industrial wastewater containing toxic dye has led to the development of highly functionalised novel composite materials for dye-loaded wastewater remediation. In this study, a conducting polymer (polyaniline) functionalised ZnO nanocomposite (PAn/ZnO-PNC) was synthesised and its adsorptive behaviour for the removal of an anionic dye (EBT) under ultrasonic irradiation was investigated. The results showed that the functionalised composite had a higher adsorption capacity and a lower pH dependency compared to pure polymer and pure nanoparticles. The adsorption mechanism was attributed to electrostatic attraction, hydrogen bonding, and pi-pi interaction. The synthesized composite showed great potential for the removal of dyes from wastewater.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Payel Das, Saimatun Nisa, Animesh Debnath, Biswajit Saha
Summary: In this study, a novel magnetic manganese ferrite/polyaniline nanocomposite (MnFe2O4-PANI-NC) was prepared for the removal of toxic anionic methyl orange (MO) dye from wastewater. The adsorption efficiency of MO dye using sono-assisted adsorption was found to be higher compared to batch stirring and shaking methods. The adsorption kinetics followed a pseudo-second order model and the adsorption mechanism can be described by the synergistic effect of electrostatic interaction and pi-pi dispersive bonding. The MnFe2O4-PANI-NC showed stability and good adsorption capacity even after multiple cycles of adsorption-desorption.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Akash Deb, Animesh Debnath, KartickLal Bhowmik, Sajal Rudra Paul, Biswajit Saha
Summary: In this research, a new nanocomposite (Fe-Mn-Zr/PANI-NC) was prepared by impregnating a mixed phase nanocomposite onto polyaniline. The nanocomposite showed high efficiency in adsorbing methyl orange (MO) and eosin yellow (EY) dyes from wastewater. The adsorption process was driven by electrostatic attraction and pi-pi interaction between the dye molecules and Fe-Mn-Zr/PANI-NC. The nanocomposite exhibited short equilibrium time, high reusability, and favorable adsorption in a wide range of solution pH.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Ajit Debnath, Jayanta Das, Krishna Deb, Kartick L. Bhowmik, Biswajit Saha
Summary: By incorporating tin dioxide (SnO2) into polyaniline (PANI) and treating it with camphor sulfonic acid (CSA), the electrical conductivity and Seebeck coefficient can be simultaneously increased. This improvement is attributed to the formation of a highly ordered molecular arrangement, reduced conjugation defects, and modification of the hopping path and activation energy in the composite. CSA treatment further enhances the performance of the composite, resulting in a high power factor. This method shows the potential for application in thermoelectric generators operating at low temperature differences.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Materials Science, Multidisciplinary
Dipankar Das, Jayanta Das, Ajit Debnath, Santanu Chakraborty, Biswajit Saha
Summary: This study develops flexible electronic materials of polyaniline (PANI) that chemically interact with Na2S, aiming to improve and tune their electrical transport properties and optical properties. The chemical interaction between Na2S and PANI leads to an increase in resistivity with the increase of Na2S concentration. The emeraldine form of partially polymerized PANI shows an excellent positive temperature coefficient of resistance, which is technologically significant for self-controlled overheating protection of electronic devices.
Article
Environmental Sciences
Mahashweta Bhowmik, Animesh Debnath, Biswajit Saha
Summary: This study presents the synthesis and application of CaFe2O4/ZrO2 magnetic nanocomposite for the removal of metanil yellow dye and Cr (VI) ions from aqueous media. The nanocomposite showed higher adsorption capacities compared to the parent metal oxide nanoparticles. Cost analysis revealed a significant reduction in treatment cost during industrial scale fabrication. The study also demonstrated the potential scalability of the treatment processes and the structural stability and reusability of the adsorbent.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Bibek Saha, Animesh Debnath, Biswajit Saha
Summary: The study focuses on the use of a new hybrid adsorbent, PANI@Fe-Mn-Zr, for the removal of hazardous MR dye from aqueous solution. Experimental results show that the adsorbent has high adsorption efficiency and capacity under specific conditions.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Dipankar Das, Jayanta Das, Krishna Deb, Santanu Chakraborty, Biswajit Saha
Summary: The designing of low-cost, flexible, and easily degradable sensors with organic materials compositions is a challenging task in recent advancements in sensor technology. A high-performance urea sensing device was developed by depositing polyaniline (PANI) on the surface of graphite (Gr) incorporated cellulose paper substrate. The PANI/Gr composite on a cellulose substrate showed notable urea sensing property, making it an active sensing material for low-cost, non-enzymatic detection of urea.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Jayanta Das, Ajit Debnath, Krishna Deb, Biswajit Saha
Summary: In this article, electrically conductive inks based on polyaniline (PANI) were prepared using phytic acid as a cross-linking agent. The resistive response of these inks at low vacuum pressure was investigated. The inks were mixed with SnO2 and graphite flakes to form tin oxide-incorporated polyaniline phytic acid (PPAS) and graphite-incorporated polyaniline phytic acid (PPAG) ink systems, respectively. The prepared ink systems were characterized by X-ray diffractometry, scanning electron microscopy, UV-vis-NIR spectroscopy, and Fourier transform infrared spectroscopy. The results demonstrated the potential applications of flexible, use-and-throw vacuum pressure sensors based on cellulose substrates in various fields.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Akash Deb, Subhajit Das, Animesh Debnath
Summary: Water pollution caused by textile industrial effluents is a growing concern. This study focuses on using a magnesium oxide/polyaniline nanocomposite to effectively treat dye pollutants in textile wastewater. The nanocomposite demonstrated high dye removal efficiency under optimal conditions, and the sorption process followed a pseudo-second-order kinetic model and Langmuir isotherm model. The cost analysis indicated the feasibility of the synthesized nanocomposite in practical applications. Furthermore, the nanocomposite showed good stability and reusability.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Bibek Saha, Sabin Shaji, Animesh Debnath
Summary: A novel nanocomposite named calcium ferrite/polyaniline (CaFe2O4-PANI) was fabricated and its potential for adsorption of the toxic cationic dye Victoria blue (VB) was studied. The CaFe2O4-PANI exhibited improved adsorptive potential for VB dye, following a pseudo-second-order kinetic model and Freundlich isotherm model.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Subhajit Das, Sajal Rudra Paul, Animesh Debnath
Summary: Waste biomass-derived biochar (CLSHB) was used for the effective removal of antibiotic drug ofloxacin (OFL) from water, with a maximum removal percentage of 91.43%. The OFL adsorption data fit well with the Langmuir isotherm model, indicating monolayer adsorption onto the CLSHB surface. The phytotoxicity assessment showed that the treated OFL solution was suitable for seed germination, and the total synthesis cost of CLSHB was found to be only 8.7 $/kg. CLSHB demonstrated strong stability and reusability, with OFL elimination efficacy decreasing to 73.26% after the fifth consecutive use.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Subhajit Das, Anwesha Pal, Animesh Debnath
Summary: In this research, a polyaniline-based magnesium ferrite nanocomposite (Pan-MgF-NC) was synthesized and used for the sequestration of cationic brilliant green (BG) dye. The experimental results showed that Pan-MgF-NC had a surface area of 56.19 m(2)/g and a pore volume of 0.056 cc/g, with pore diameters ranging from 20 to 40 nm. The impact of various parameters on the dye removal efficiency was investigated.
Article
Engineering, Environmental
Bibek Saha, Saptarshi Gayen, Animesh Debnath
Summary: The production of pharmaceuticals has reached its peak due to the rise in diseases, posing a serious threat to the environment through the disposal of untreated pharmaceutical products in water. This study focuses on using a metal oxide-based polymer (ZnO/PPy) for the removal of paracetamol from water through adsorption technology. The fabricated adsorbent was characterized and the adsorption process was found to follow a pseudo-second-order kinetic model. The cost of synthesis and removal of paracetamol were also evaluated. Batch mode scale-up design indicated the required amount of ZnO/PPy for effective treatment of contaminated water.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(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.
