Article
Environmental Sciences
Jianhui Liu, Xiangnan Wei, Wanqing Sun, Xinxin Guan, Xiucheng Zheng, Jun Li
Summary: Constructing S-scheme heterojunction photocatalysts through a facile ultrasound strategy demonstrates improved separation efficiency of photogenerated carriers and enhanced harvesting ability of solar energy. The ternary CdS-g-C3N4-GA heterojunction exhibits significantly enhanced photocatalytic degradation performance for dyes and antibiotic wastewater, as well as improved photocatalytic H2 production activity.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yifan Ren, Fei Yu, Xin-Gui Li, Jie Ma
Summary: Graphene has excellent physical and chemical properties, making it promising for environmental applications. The inherent problems of nanomaterials hinder its large-scale application, but immobilizing nanomaterials into macroscopic structures can address these issues. Multi-dimensional graphene materials show unique removal performance and mechanisms in adsorption and membrane separation, which are significant for advancing nano-water treatment chemistry and technology.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
Qingsong Hu, Jintao Dong, Yong Chen, Jianjian Yi, Jiexiang Xia, Sheng Yin, Huaming Li
Summary: In this study, MIL-125(Ti)/BiOI nanocomposite was synthesized and applied for the adsorption and degradation of specific organic contaminants in water. The nanocomposite exhibited high adsorption capacity and photodegradation rate due to the advantageous interface contact and electron transfer of MIL-125(Ti) and BiOI. This research extends the knowledge in constructing bifunctional nanocomposites with potential applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Shengnan Jin, Yanan Yang, Jiejing Zhang, Hong Zheng
Summary: This study successfully prepared a 3D TiO2/rGO material with significantly enhanced adsorption-photocatalytic activity, showing great potential for highly efficient removal of MCs in water.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Environmental
Hongyang Pan, Jiamin Gu, Kaiyang Hou, Junyao Li, Yu Wang, Yiying Yue
Summary: Photocatalytic technology is a highly efficient and promising sewage treatment technology. However, its recycling difficulty limits its applications. In this research, a composite aerogel with excellent properties was developed for the adsorption and degradation of RhB dye. The composite showed good adsorption and degradation performance, as well as recycling and mechanical properties.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Truong Thi Phuong Nguyet Xuan Trinh, Do Minh Nguyet, Tran Hoang Quan, Trinh Ngoc Minh Anh, Doan Ba Thinh, Le Tan Tai, Nguyen Thi Lan, Dinh Ngoc Trinh, Nguyen Minh Dat, Hoang Minh Nam, Mai Thanh Phong, Nguyen Huu Hieu
Summary: Three-dimensional graphene aerogel materials were fabricated using ethylenediamine and graphene oxide sheets, and showed high adsorption capacities for methylene blue and methyl orange. Optimal adsorption conditions and mechanisms were identified through experiments.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
A. Jimenez-Almarza, A. Lopez-Magano, R. Cano, B. Ortin-Rubio, D. Diaz-Garcia, S. Gomez-Ruiz, I. Imaz, D. Maspoch, R. Mas-Balleste, J. Aleman
Summary: The mixture of triphenylamine (TPA) and phenyl phenothiazine (PTH) fragments in extended polyimine structures showed varying photocatalytic activities in the degradation of different pollutants under visible light irradiation. Materials with PTH as the sole photoactive unit exhibited the most active photocatalytic performance for polybrominated diphenyl ether-1 and Sudan Red III degradation, while the covalent organic framework containing only TPA was the best photocatalyst for degrading Methylene Blue. These differences were attributed to the versatile abilities of PTH to trigger both photoredox and energy transfer processes, compared to TPA which primarily acts as an energy transfer catalyst.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Ton That Buu, Vo Hoai Son, Nguyen Thanh Hoai Nam, Nguyen Duy Hai, Hoai-Thanh Vuong, Le Tran Ky Quang, Nguyen Minh Dat, Tong Hoang Lin, Mai Thanh Phong, Nguyen Huu Hieu
Summary: A zinc oxide-doped titanium dioxide/graphene aerogel (ZnO-TiO2/GA) nanocomposite was synthesized for efficient removal of dyes and toxic metals in aqueous media. The material showed excellent photocatalytic-adsorption capacity, with degradation efficiencies of 99.7%, 97.3%, and 94.9% for methylene blue, rhodamine B, and methyl orange, respectively, under optimal conditions. The nanocomposite also exhibited high reusability and a maximum absorption capacity of 380.6 mg g-1 for Cd2+ ions and 230.1 mg g-1 for Co2+ ions, making it suitable for water treatment and textile dyeing waste.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zohreh Ghahghaey, Malak Hekmati, Masoud Darvish Ganji
Summary: In this study, different functionalized graphene structures were investigated for their ability to remove phenol. The results showed that functionalized graphene structures are more stable and efficient for phenol removal compared to pristine graphene.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Ramin Shadkam, Malek Naderi, Arash Ghazitabar, Somaye Akbari
Summary: With the advancement of industries, the environment is facing increasing pollution from effluents, posing threats to ecosystems and living organisms. This study prepared rGO/CNC hybrid aerogels as an adsorbent, enhancing compressive strength and demonstrating excellent adsorption performance.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Yanyang Liu, Xiaofang Yang, Jing Ai, Qigao Shang, Dongsheng Wang, Guiying Liao
Summary: Transforming biomass solid waste and spent adsorbents into high-value products for wastewater remediation is a new concept of green chemistry and environmental protection. In this study, a multistage utilization strategy of solid waste was proposed to prepare adsorbents and photocatalysts. A biomass-based aerogel with excellent adsorption performance was fabricated from waste reed, and then converted into a functional photocatalyst for tetracycline degradation. The study highlights the feasibility of high-value conversion of hazardous waste adsorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Hasan Abedpour, J. S. Moghaddas, Maryam N. Borhani, Tohid N. Borhani
Summary: Water sources are polluted daily due to destructive human activities, and the release of sewage in water bodies has become unacceptable. Regulations are now in place to reduce pollution, as understanding of public health has increased. Adsorption is a commonly used method to remove contaminants from water, with silica aerogel (SA) being a suitable adsorbent. Different types of SA-based adsorbents are reviewed, and the appropriate type of silica adsorbent for each pollutant is introduced.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Shen Shen, Hongbo Wang, Jiajia Fu
Summary: In this study, a novel 3D graphene aerogel doped with carbon quantum dots decorated TiO2 nanosheets was successfully fabricated and applied as an efficient catalyst for degrading organic pollutants in aqueous solutions under visible-light irritation. The unique structure of the 3D graphene aerogel provided fast charge transfer channels, leading to significantly higher degradation rates compared to CDs-TNs and 3DGA alone. Additionally, the 3DGA@CDs-TNs exhibited excellent stability and recyclability during the experiments, confirming its durability and practicality.
APPLIED SURFACE SCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Leonardo O. Amaral, Ana L. Daniel-da-Silva
Summary: The need for fresh and conveniently treated water has raised concerns in recent years. Molybdenum disulfide (MoS2) nanomaterials have gained attention in various fields, including energy, hydrogen production, and water decontamination. This review provides an overview of recent developments in MoS2-based nanomaterials for water treatment via adsorption and photodegradation. The combination of MoS2 with other components creates nanocomposites with enhanced properties. The review also summarizes the performance of MoS2-based materials in adsorption and photocatalytic degradation of heavy metal ions and organic contaminants. However, further studies are needed to evaluate the ecotoxicity of MoS2 in water treatment.
Article
Chemistry, Physical
Rabindranath Lo, Martin Pykal, Andreas Schneemann, Radek Zboril, Roland A. Fischer, Kolleboyina Jayaramulu, Michal Otyepka
Summary: Covalent hybrids of graphene and metal-organic frameworks (MOFs) have great potential in various technologies, especially catalysis and energy applications, due to their combination of conductivity and porosity. The formation of an amide bond between carboxylate-functionalized graphene acid (GA) and amine-functionalized UiO-66-NH2 MOF is an efficient strategy for creating such hybrids. This study used density functional theory (DFT) calculations to elucidate the mechanism of amide bond formation between GA and UiO-66-NH2, highlighting the crucial role of zirconium within UiO-66 as a catalyst. Insight into the binding interactions between graphene derivatives and MOFs can lead to tailored synthesis strategies for these nanocomposite materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Zehao Huang, Junye Cheng, Huibin Zhang, Yingfei Xiong, Zhanxin Zhou, Qingbin Zheng, Guangping Zheng, Deqing Zhang, Maosheng Cao
Summary: Hierarchical heterostructures based on VB-group laminated vanadium disulfide nanosheets embedded with cobalt tetroxide nanoparticles were constructed, which showed strong electromagnetic coupling and enhanced microwave absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Wentao Yang, Guangping Zheng
Summary: High-entropy ceramics (HECs) (Bi0.2Na0.2K0.2La0.2Sr0.2)TiO3 (BNKLST) with a single-phase perovskite structure were successfully prepared by a modified citrate acid method. Compared to (Bi0.5Na0.5)TiO3 (BNT) ceramics, BNKLST HECs exhibit dense nanostructures with improved electrical and dielectric properties at elevated temperatures, making them promising dielectrics for electrical energy storage applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Huibin Zhang, Tingting Liu, Zehao Huang, Junye Cheng, Honghan Wang, Deqing Zhang, Xuewei Ba, Guangping Zheng, Ming Yan, Maosheng Cao
Summary: This research focuses on the synthesis of WS2-carbon fiber composites using a simple hydrothermal method and their application in EMI shielding for electronic devices. The results show that the EMI shielding performance of WS2-CF is significantly improved, especially at S- and C-bands. The composite material achieves an EMI shielding efficiency of 36.0 dB at 2 GHz, which is much better than that of pure carbon fiber.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Multidisciplinary
Huibin Zhang, Junye Cheng, Honghan Wang, Zehao Huang, Qingbin Zheng, Guangping Zheng, Deqing Zhang, Renchao Che, Maosheng Cao
Summary: VB-Group NbS2 nanosheets prepared through a facile one-step solvothermal method exhibit remarkable electromagnetic wave absorption performance, showing tunable absorbing frequency bands (C-, X-, and Ku-bands) and the ability to adjust performance by changing material contents.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
S. Qiu, G. P. Zheng, Z. B. Jiao
Summary: Alloying plays a crucial role in determining the phase stability and mechanical behavior of medium/high entropy alloys. This study quantitatively investigates the effects of Al, Ti, Mo, and W additions on CoCrNi alloys through first-principles calculations. The results reveal that different alloying elements have varying effects on the stability and structure of the alloy, with the solute strengthening effect decreasing in the order of W > Mo > Ti > Al.
Article
Physics, Condensed Matter
Shujuan Jiang, Guang-ping Zheng
Summary: In this study, a series of Janus XYP2 monolayers with multifunctional properties, including good stability, electronic, mechanical, piezoelectric, and ferromagnetic properties, were predicted based on density functional theory. These materials have potential applications in various fields.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Zhuo Han, Tian Li, Guangping Zheng
Summary: Heterogeneous structures of lead-free 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3) solid-solution thin film and few-layer graphene oxide (GO) were prepared and investigated for their morphology, piezoelectric properties and electrical energy storage performances. It was found that the electrical breakdown strength of the solid-solution thin film was significantly improved due to the presence of covalently bonded GO nanosheets that could counteract the applied electric field. The heterostructures exhibited outstanding electrical energy storage density up to 4.26 J cm(-3) at elevated temperatures (80-120 degrees C). The results demonstrate that developing dielectrics-GO heterostructures is an effective approach to enhance the energy storage density of dielectric capacitors for practical applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Shujuan Jiang, Chang Liu, Pengyu Liu, Huabing Yin, Guang-Ping Zheng
Summary: The effects of carrier doping on the magnetic and electronic properties of 2D Janus TiXO systems were investigated using first-principles calculations. It was found that Janus TiXO possesses tunable magnetic properties, making it a promising material for electronics and spintronics applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Chemistry, Physical
Honghan Wang, Huibin Zhang, Junye Cheng, Tingting Liu, Deqing Zhang, Guangping Zheng, Shangru Zhai, Maosheng Cao
Summary: The addition of biomass-based glucose derived carbon (GDC) on the surface of VB-Group transition metal disulfides (TMDs) VS2 nanomaterials enhances their electromagnetic wave (EMW) absorption performance, increases the effective absorption bandwidth (EAB), and improves environmental stability and electronic parameters. The VS2/GDC hybrids exhibit promising potential as candidate materials for tunable EMW absorbers with enhanced absorption performance and environmental stability.
JOURNAL OF MATERIOMICS
(2023)
Article
Materials Science, Multidisciplinary
Yu Liu, Guangping Zheng
Summary: The dislocation plasticity of TiZr-based hexagonal close-packed (HCP) concentrated solid-solution alloys (CSAs) is investigated using a multiscale simulation approach. The addition of Y and Sc in TiZrHf CSAs significantly enhances dislocation-mediated slip. The multiscale simulation approach accurately predicts the mechanical properties of CSAs and elucidates the deformation mechanisms at atomic scales.
Article
Materials Science, Multidisciplinary
X. F. Gong, Z. H. Gao, L. P. Nie, S. Qiu, Q. Yu, H. Wu, G. P. Zheng, Z. B. Jiao
Summary: This study systematically investigated the effects of 3d, 4d, and 5d transition elements on the phase stability, mechanical properties, and deformation behavior of L12 Co-Ti-based alloys using first-principles calculations. The results showed that certain transition elements tend to occupy specific sites, reducing the structural stability of the alloys. The analysis also revealed that the strengthening of the alloys is attributed to the strong covalent character of the Co-M bonds. The study provides insights into the fundamental understanding of multicomponent L12 compounds and offers guidelines for designing superior Co-based superalloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yu Liu, Guang-Ping Zheng
Summary: In this study, the influences of oxygen interstitials and magnetisms on the phase stability and structural transformation of CoCrFeNi high-entropy alloy (HEA) were investigated using first-principles calculations. It was found that oxygen interstitials tend to form at octahedral sites neighboring with more Cr or less Ni in the face-centered cubic (FCC) CoCrFeNiOx HEA. The HEA prefers FCC over hexagonal close-packed (HCP) phases when the oxygen concentration exceeds a certain value, and this structural transformation may be driven by magnetisms. Moreover, the synergy effects of oxygen interstitials and magnetisms facilitate the structural transformation.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Chemistry, Physical
Shujuan Jiang, Guangping Zheng
Summary: Novel two-dimensional Janus GaOClX (X = F, Br, and I) monolayers with superior energy storage properties are predicted based on first-principles calculations. They possess anisotropic carrier mobility, strong mechanical flexibility, and excellent out-of-plane piezoelectricity, making them potential candidates for dielectric capacitors with high energy storage density. The GaOCl monolayer and Janus GaOClX monolayers have been found to exhibit an ultrahigh energy storage density comparable to that of electrochemical supercapacitors and batteries, surpassing other dielectric materials reported so far.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Hassan Raza, Junye Cheng, Cong Lin, Soumyadip Majumder, Guangping Zheng, Guohua Chen
Summary: The development of lithium-sulfur (Li-S) batteries with high energy density and cycling stability is hindered by the slow polysulfide conversion and adverse shuttling effects. Therefore, new electrocatalysts are needed to facilitate the practical applications of Li-S batteries. In this study, a single-phase high-entropy stabilized oxide (Ni0.2Co0.2Cu0.2Mg0.2Zn0.2)O is prepared and integrated into the sulfur host, functioning as both the catalytic converter and chemical inhibitor towards the shuttle species. The resulting cathode exhibits significantly improved discharge capacity and cycling stability compared to other cathodes, demonstrating the potential application of high-entropy oxides (HEOs) in enhancing the performance of Li-S batteries.
Article
Chemistry, Physical
Xiaobo Shi, Shujuan Jiang, Xianwei Han, Min Wei, Bing Wang, Gaofeng Zhao, Guang-Ping Zheng, Huabing Yin
Summary: The structural stability, electronic properties, mechanical flexibility, and intrinsic piezoelectricity of InSeBr-type monolayers are comprehensively investigated. The results show that InSeBr-type monolayers exhibit ultrahigh mechanical flexibility and superior piezoelectric response, making them promising for applications in sensors and energy harvesters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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.
