Article
Crystallography
Shuai Wang, Ying Jiang, Yufeng Guo, Feng Chen, Lingzhi Yang
Summary: The study demonstrates that adding a small amount of specularite can improve the roasting properties and increase the compression strength of fluorine-bearing iron concentrate pellets, expanding the suitable roasting temperature range. The total iron content of pellets is also increased.
Article
Physics, Multidisciplinary
L. Craco, S. Leoni
Summary: Using density functional dynamical mean-field theory, we explain how correlation effects in pure and doped KFe2Se2 superconductors lead to pseudogap and Kondo-quasiparticle features in the electronic structure, as well as the emergence of an incoherent-coherent crossover in the normal state. This crossover helps understand the puzzling temperature- and doping-dependent evolution of resistivity and Hall coefficient observed in experiments on alkali-metal intercalated iron-selenide superconductors. Our microscopic description highlights the role of incoherent and coherent electronic excitations in unconventional transport responses of strange, bad metals.
Article
Chemistry, Physical
Yanbo Liu, Jinbo Ouyang, Xuemei Wei, Guoqi Yu, Hualiang Shen, Runpu Shen, Xin Zhang, Weiwei Tang, Mingyang Chen, Kangli Li, Junbo Gong
Summary: In this study, an adsorption-desorption mechanism of temperature-driven molecular clustering is proposed to explain the oiling-out phenomenon in solution crystallization. A prediction method for oiling-out phase diagram has been established based on this mechanism, and successfully applied to five systems. Notably, the purity of pyraclostrobin is greatly increased with the assistance of the oiling-out phase diagram. These findings provide insights into understanding and controlling oiling-out during crystallization.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Satoshi Aya, Osamu Haba, Koichiro Yonetake, Fumito Araoka
Summary: Azodendrimers are a class of branched polymers with structure modulated by light irradiation. A new type of liquid crystalline dendrimers has received attention due to their properties changing in response to light. Molecular dynamics and density functional theory analysis are used to explore properties, such as surface anchoring, molecular conformation, and phase structure. The phase transition behavior of azodendrimers is affected by cooling rate and different conformational states can coexist at single liquid crystalline phase.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Qi Cheng, Yonghao Sun, Jiri Orava, Haiyang Bai, Weihua Wang
Summary: The subtle existence of a liquid-liquid transition in 'homogeneous' equilibrium metallic liquids has been detected and a phase diagram inclusive of the transition has been constructed using ultrafast calorimetry.
Article
Crystallography
Wei Han Lin, Zai-Qun Yu, Pui Shan Chow, Reginald Beng Hee Tan
Summary: Liquid-liquid phase separation (LLPS) during crystallization of APIs with low melting points can lead to agglomeration, but seeding and seed ageing at low supersaturation can effectively mitigate this issue. Surfactants such as Tween 80 and hydroxypropyl methylcellulose (HPMC) have been preliminarily confirmed to affect LLPS and crystallization, with further research needed to explore their potential usefulness in LLPS handling. The findings and techniques presented in this study may have broader applications in crystallization of other APIs with low melting points.
Article
Engineering, Chemical
Zai-Qun Yu, Fang-Kun Zhang, Reginald Beng Hee Tan
Summary: The phenomenon of LLPS during pharmaceutical crystallization development is gaining more attention, causing quality issues and potential hindrance to the crystallization process. Many studies have focused on LLPS and a synthesis of the current state-of-art is needed. This review summarizes the recent advances in LLPS research and strategies to cope with it.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Chemistry, Physical
Nikita Orekhov, Mikhail Logunov
Summary: Liquid carbon presents unresolved questions regarding its structure and thermodynamic stability. Experimental observations show a significant density decrease along the graphite melting line, and the reasons behind this phenomenon remain unclear. Recent studies suggest that liquid carbon exhibits a network of sp-hybridized chains and the nanoscale porosity of this phase contributes to the density decrease. Additionally, the excessive heat capacity could be attributed to a smooth transition between high-density sp(2)-hybridized phase and low-density sp-hybridized phase.
Article
Materials Science, Multidisciplinary
Jian-Tao Ju, Ke Ma, Xiang-Dong Xing, Gui-Qing Zhao, Qi-Di Li
Summary: This paper investigates the oxidation induration mechanism of barium-bearing magnetite concentrate pellets with BaSO4 as an additive. The results show that BaSO4 reacts with SiO2 and Fe2O3 to form BaSiO3 and BaFe2O4. The addition of BaSO4 promotes the induration process of the pellets, but excessive BaSO4 suppresses the growth of hematite grains, leading to a decrease in compressive strength and an increase in porosity.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Fengmiao Li, Ilya Elfimov, George A. Sawatzky
Summary: The discovery of higher-temperature superconductivity in FeSe monolayers on SrTiO3 substrates has sparked a surge of interest in interface superconductivity. The study finds that modulation doping by impurities in the substrate is critical for enhancing superconductivity, and there is likely an important interaction limiting the FeSe doping. Furthermore, the polarization change of the interface Se and the titanate substrate acting as a charge reservoir play important roles in the interface superconductivity.
Article
Materials Science, Multidisciplinary
Sudip Pokharel, Huaxiang Fu
Summary: The study found that the local magnetic moment significantly stabilizes the FeSe system and induces a strong magnetostriction effect. Furthermore, the LMM substantially alters the electron band structures and Fermi surfaces in the superconductor, leading to rich and interesting physics that can be tuned.
Article
Materials Science, Multidisciplinary
Pavel A. Maksimov
Summary: This study investigates the field-induced phase transitions of BaCo2(AsO4)2, a candidate for the Kitaev honeycomb model, using numerical methods. The observed sequence of steplike transitions in magnetic field is realized in the phase diagram of the minimal model. Interestingly, an intermediate up-up-down plateau phase is stabilized near a double-zigzag-zigzag phase boundary.
Article
Chemistry, Physical
Y. Arai, Kenta Kuroda, T. Nomoto, Z. H. Tin, S. Sakuragi, C. Bareille, S. Akebi, K. Kurokawa, Y. Kinoshita, W-L Zhang, S. Shin, M. Tokunaga, H. Kitazawa, Y. Haga, H. S. Suzuki, S. Miyasaka, S. Tajima, K. Iwasa, R. Arita, Takeshi Kondo
Summary: Rare-earth intermetallic compounds exhibit rich phenomena induced by the interplay between localized f orbitals and conduction electrons. In this study, the low-energy electronic structures of CeSb were examined through anomalous magnetostructural transitions, revealing a new type of quasiparticle called the 'multipole polaron', which consists of a mobile electron dressed with a cloud of the quadrupole crystal-electric-field polarization. The coupling strength between the mobile electrons and the crystal-electric-field excitations is strong, exhibiting anomalous step-like enhancement during the transition.
Article
Multidisciplinary Sciences
Andrew Hardy, Arijit Haldar, Arun Paramekanti
Summary: We propose and study a two-orbital lattice extension of the Sachdev-Ye-Kitaev model in the large-N limit. The phase diagram of this model features a high-temperature isotropic non-Fermi liquid which undergoes first-order thermal transition into a nematic insulator or continuous thermal transition into a nematic metal phase, separated by a tunable tricritical point. These phases arise from spontaneous partial orbital polarization of the multiorbital non-Fermi liquid. We explore the spectral and transport properties of this model, including d.c. elastoresistivity, which exhibits a peak near nematic transition, as well as nonzero frequency elastoconductivity. Our work offers a useful perspective on nematic phases and transport in correlated multiorbital systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Chihiro Miura, Yusuke Sanada, Yukiteru Katsumoto, Keisuke Watanabe
Summary: The structure and phase behavior of mixtures of two ionic liquids were investigated at low temperatures, and a phase diagram was established. The mixtures exhibited complex phase transitions, which depended on their composition.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Physical
Yekai Zhang, Shuai Wang, Hong Zhong, Xin Ma, Zhanfang Cao
Summary: In this paper, a self-supporting catalyst-Ni3S2@FeCrMoSx/NF was prepared using metal organic frameworks as templates. The morphology of the pre-catalyst was significantly changed after the sulfidation reaction, leading to a remarkable improvement in the composition and catalytic performance of the catalyst. The Ni3S2@FeCrMoSx/NF catalyst exhibited low overpotential, high electrochemical stability, and a low Tafel slope, which can be attributed to the increased electrochemical surface area, synergistic effect among multi-metals, and the synergistic effect of polymetallic sulfides generated by sulfidation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Xiang Liu, Jiali Tang, Likang Fu, Hao Wang, Shuai Wang, Chao Xiong, Shixing Wang, Libo Zhang
Summary: In order to efficiently and selectively remove lead ions from industrial wastewater, researchers synthesized a novel Zr-based metal-organic framework adsorbent (UiO-DCCA) with a novel N,N'-(4carboxylic-pyridine-2,6-diyl) dipicolinimidamide ligand for the efficient and selective capture of Pb(II). The selective adsorption experiment showed unique affinity of UiO-DCCA for Pb(II), with a maximum adsorption capacity of 353.29 mg/g. This study demonstrates the value of new self-designed organic ligands in metal-organic framework materials for selectively capturing heavy metal ions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Qiren Wang, Xin Ma, Shuai Wang, Zhanfang Cao, Zongwei Hua, Hong Zhong
Summary: This study presents an efficient process for the preparation of fertilizers using sintering dust as raw material. The K, S, and Cl in the dust were selectively leached using water, followed by adsorption of Cl- ions to form K2SO4 solution and desorption to form NH4Cl solution. The purified solutions were crystallized to obtain superior potassium sulfate and ammonium chloride products, providing a new potassium source for fertilizer manufacturing.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Mathematics
Shuai Wang, Fuli He
Summary: In this paper, the Riemann boundary value problem for Liapunov open curve in variable exponent space is studied. The open curve is supplemented as a closed one, and the problem is converted to the Riemann boundary value problem for closed curve in the variable exponent space. The problem is solved by discussing the singularity of the endpoints. Furthermore, the results are utilized to solve the Hilbert boundary value problem for piecewise Liapunov closed curve in the variable exponent space. The singularity of the discontinuity is also discussed, and the solvable conditions and explicit solutions of the Hilbert problem for piecewise Liapunov closed curve in the variable exponent space are obtained.
JOURNAL OF GEOMETRIC ANALYSIS
(2023)
Article
Chemistry, Organic
Jia Yang, Lei Fan, Chen Chen, Mingyue Wang, Bingqian Sun, Shuai Wang, Hong Zhong, Yongbo Zhou
Summary: In this study, we developed an efficient Ni-catalyzed C-F bond phosphorylation of aryl fluorides using the intermediates of P-P(O) and P(O)OR. We observed that active aryl fluorides can generate organophosphorus compounds via P-P(O) mediation, while inactive aryl fluorides can also be activated and phosphorylated through a P(O)OR-mediated pathway, which has been rarely reported. The scalability to gram level and the possibility of upgrading bioactive molecules suggest promising applications of this protocol in synthetic chemistry.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Physical
Chao Wang, Yufeng Guo, Shuai Wang, Feng Chen, Lingzhi Yang, Yu Zheng
Summary: In this paper, a calcification and reduction roasting process was proposed to remove sodium from vanadium tailings. The effects of Ca(OH)(2) addition, reduction temperature, and roasting time on the sodium removal behavior and compression strength of pellets were studied. The treated product after removing sodium can be recycled in the ironmaking process in a steel company.
Article
Metallurgy & Metallurgical Engineering
Jianfa Jing, Yufeng Guo, Feng Chen, Shuai Wang, Lingzhi Yang
Summary: This study proposes a novel process to prepare boiling chlorinated charges from modified titanium slag, which includes sulfuric acid leaching, hydrochloric acid leaching, and removing silica from the hydrochloric acid leach residue. The leaching efficiencies of various elements were systematically investigated and achieved acceptable results. The product obtained in this process meets the requirements of the chemical compositions for boiling chlorinated charge.
Article
Materials Science, Multidisciplinary
Jiayao He, Jing Li, Shuai Wang
Summary: The study proposes a copper slag price adjustment method for dechlorination and a synergistic high-activity copper deep dechlorination method. Comparative experimental studies show that the single-stage chloride ion removal rate is 86.1%, and the synergistic effect can increase the chloride ion removal rate to 92.43%. Under ultrasonic conditions, the chloride ion removal rate can be further increased to 96.6%, achieving deep dechlorination effect.
Article
Engineering, Chemical
Hongyu Sun, Xin Ma, Lingyun Fei, Zhanfang Cao, Hong Zhong, Shuai Wang
Summary: This study successfully applied a multifunctional surfactant, 2-dodecanoylamino-pen-tanedioic acid (DPA), to achieve flocculation and recovery of fine rhodochrosite particles. The use of DPA resulted in larger aggregation compared to sodium oleate (NaOL), leading to enhanced collecting ability for fine rhodochrosite particles. The formation of weak-to-medium hydrogen bonds among the functional groups in the DPA complex further strengthened the aggregation between rhodochrosite particles. These findings provide new insights into the aggregation generation among fine particles in the presence of surfactants with multiple functional groups.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zeqiang Xie, Guang Li, Yufeng Guo, Shuai Wang, Feng Chen, Lingzhi Yang, Ganghua Fu, Tao Jiang
Summary: The phase transformation behavior of zinc-containing dust was studied using a calcification roasting process, and zinc-iron separation behavior was examined by ammonia leaching. Results showed that increasing the calcium oxide to dust ratio promoted the conversion of zinc ferrite to zinc oxide. A zinc-iron recovery rate of 86.12% was achieved through ammonia leaching.
Article
Chemistry, Multidisciplinary
Mengbi Zhang, Xin Ma, Shuai Wang, Zhanfang Cao, Hong Zhong
Summary: In this work, inexpensive commercial stainless steel is modified by a simple hydrothermal method, achieving surface corrosion modification and active substance loading simultaneously with oxalic acid. The modified stainless steel shows significantly reduced overpotential and exceptional stability. This work opens up the possibility of large-scale application of stainless steel-based electrocatalysts in actual production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Qiren Wang, Shuai Wang, Xin Ma, Zhanfang Cao, Chao Zhang, Hong Zhong
Summary: A green method for producing electrolytic manganese metal was developed using solvent extraction to address the challenges of impurity magnesium and ammonia nitrogen in electrolyte. The process involved leaching, heavy metal removal, solvent extraction, stripping, and electrolysis. Neodecanoic acid was used as an extractant with excellent separation capacity for impurity magnesium. The electrolytic manganese metal produced met the Chinese national standard for DJMnD grade products and had high resource utilization and clean production advantages.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Qiyang Lin, Shuai Wang, Xin Ma, Jia Yang, Hong Zhong
Summary: In this study, a chelating collector named O-isobutyl-N-hydroxyethyl thionocarbamate (IBHETC) was successfully synthesized using ethanolamine instead of ethylamine. The molecular behavior and flotation performance of IBHETC for chalcopyrite were investigated through various techniques including NMR, MD simulations, and DFT calculations. The research results revealed the existence of two isomers in IBHETC and the formation of an identical IBHETC-(N,O,S)-Cu complex through deprotonation-isomerization mechanism after reacting with Cu+. The selective adsorption of IBHETC onto chalcopyrite surface was confirmed through surface tension test, FTIR, UV, and XPS results, contributing to the hydrophobic flotation. This research is expected to enhance the molecular design and industrial applications of functional surfactants.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Dong Cao, Shuai Wang, Xin Ma, Jia Yang, Hong Zhong
Summary: A novel C=O-NOH-contained compound was synthesized and used for the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selectivity to Cu(II) and strong separation effect compared to other extractants. The investigation of extraction mechanism revealed that O atoms in C=O and O-H groups of DPEHA operated as active sites, enabling powerful chelation with Cu(II) by forming stable five-membered rings. The high copper extraction efficiency and selectivity, along with the simple synthesis of DPEHA, make it a potential selective Cu(II) extractant and contribute to the research and development of economical Cu(II) extractants.
SOLVENT EXTRACTION AND ION EXCHANGE
(2023)
Article
Engineering, Environmental
Hao Wang, Shuai Wang, Shixing Wang, Likang Fu, Libo Zhang
Summary: Due to its irreversible toxicity and harm to human health, lead contamination has attracted a lot of attention. Therefore, the development of low-cost and high-performance removal methods has become a popular issue. In this study, a novel metal-organic framework (AMO-MOF) was developed for the selective adsorption of Pb(II) from water. AMO-MOF inherits the structural characteristics of mesoporous materials and has a specific surface area of 255.251 m2/g. The adsorption reached equilibrium at 180 min, and the maximum adsorption capacity of AMO-MOF for Pb(II) was 472.73 mg/g. The adsorption mechanism mainly involves the chelation and electrostatic interaction of N and O-containing functional groups on the adsorbent with Pb(II). The excellent adsorption performance of AMO-MOF for Pb(II) suggests its great potential for practical environmental remediation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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.
