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Study on the flow and collision characteristics of catalyst particles in FCC reactor Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Fang Liu, Caifu Li, Xingyang Zeng, Jun Chen, Jingjun Guan, Li Yang
Fluid Catalytic Cracking (FCC), a typical fluidization technology, faces serious issues of catalyst particle attrition and loss. Attrition is an important cause of catalyst loss. Due to the small particle size and complex flow process inside the reactor,it is difficult to conduct experimental research on it. The flow, collision and attrition characteristics of catalyst in the reactor are still unclear
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Numerical simulations on the flow regime characteristics of horizontal pneumatic conveying using CFD-DEM Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Jiawei Zhou, Yaojie Xu, Xiaole Guo, Wenshu Cai, Xi Wei, Hongxiang Jiang
To elucidate the flow regime characteristics and boundary conditions of gas-solid two-phase flow in horizontal pipe pneumatic conveying, the flow characteristics were studied based on the four-way coupled CFD-DEM method. Based on the experimental verification of flow regimes, the flow characteristics at different superficial gas velocities were analyzed from three perspectives. The results showed that
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Study of erosion-induced leakage flow in guide vane of Francis turbine using erosion-coupled mesh deformation simulations Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Subodh Khullar, Rahul Tarodiya, Sandeep Kumar
Erosion of the hydro-turbine components in sediment-laden flows results in a reduction in the efficiency and life of turbine components. The particles in the water affect the operation of both stationary and dynamic components. In the present study, the guide vanes and facing plates of a Francis turbine are numerically investigated regarding their susceptibility towards erosion using an erosion-induced
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Thermal conductivity and photothermal characteristic of core-shell Fe3O4@C nanofluids in different particle size Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Mingci Hu, Shan Qing, Xiaohui Zhang, Hao Zhang, Zichang Shi
Instability is a key issue that limits the application of magnetic nanofluids. In this study, FeO@C nanoparticles were obtained using a carbon layer coated with a ferromagnetic material, which improved the instability of the magnetic nanofluid while obtaining higher thermal conductivity and showed excellent photothermal conversion performance in photothermal conversion experiments. Firstly, we prepared
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Study on particle deposition in pipeline groove from gas–particle two-phase flow Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Guang Zhang, Yang Hao Mao, Zhen Xing Liu, De Sheng Chen, Fei Wu, Zhe Lin
In the process of particle–fluid flow, solid particles are easily deposited in pipes, which leads to collisions and abrasion, especially in pipelines with grooves. Therefore, some structural components are always designed above the groove to improve particle trajectories inside the groove in the pipeline. In the present study, the deposition of particles was analyzed in detail by means of experimental
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Research on the reaction behavior of pellets in typical atmospheres of shaft furnaces: Reduction swelling and carbon deposition Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Lian-da Zhao, Xing-jian Deng, Hai-bin Zuo, Qing-guo Xue, Jing-song Wang
In this work, the volume swelling and carbon deposition behavior of pellets under shaft furnace smelting conditions were studied. The research process on swelling reduction utilized an online detection imaging method to determine the volume changes of pellets. The results suggest that an increase in temperature and a higher proportion of carbon monoxide in the reducing gas contribute to an escalation
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Direct reduction of iron-ore with hydrogen in fluidized beds: A coarse-grained CFD-DEM-IBM study Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Bin Lan, Ji Xu, Shuai Lu, Yige Liu, Fan Xu, Bidan Zhao, Zheng Zou, Ming Zhai, Junwu Wang
Hydrogen metallurgy technology uses hydrogen as the reducing agent instead of carbon reduction, which is one of the important ways to reduce carbon dioxide emissions and ensure the green and sustainable development of iron and steel industry. Due to the advantages of high gas-solid contact efficiency and outstanding mass and heat transfer, direct reduction of iron ore in fluidized beds has attracted
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Comparison of SiO2/TiO2 photocatalysts with different thicknesses synthesized by fluidized bed atomic layer deposition Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Wei Liu, Zuyang Zhang, Daoyin Liu
SiO/TiO core/shell particles are effective photocatalysts, whose performance strongly depends on TiO film thicknesses. Fluidized bed atomic layer deposition (FBALD) can precisely control film thickness at the sub-nanometer scale. In this work, TiO films with different thicknesses are deposited on SiO particles via different ALD cycles at 180 °C in a fluidized bed reactor. TEM images indicate that complete
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Formulation in a drop - Templated granulation and compaction analysis Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Paola Medina Monsanto, Line Koleilat, Shashwat Gupta, Sydney Butikofer, Paul Mort, Jonathan Wade
Binder-powder interactions were investigated using single drop penetration on pharmaceutically relevant static powder beds. Experimental effects included polymer binder type, binder concentration, drug load, and pre-wetting of the powder bed. These screening effects are relevant to formulations requiring binder granulation, especially challenging formulations having high levels of micronized active
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Water and mud inrush dynamics process simulation by using coarse-grained CFD-DEM method Powder Technol. (IF 5.2) Pub Date : 2024-03-12 Kaiwei Chu, Hai Tian, Yuqing Feng, Baoyu Guo, Zongqing Zhou, Haocheng Sun, Jianhong Wang, Weibin Zhu, Xiaochun Zhong
Water and mud inrush disaster is a typical fluid-solid coupling problem, and its forecasting and prevention can reduce human and economic losses. In this work, a coarse-grained discrete element method and computational fluid dynamics model based on bonded particles is employed to investigate an inrush disaster happened in Foshan Metro Line 2. It's shown that the current model can simulate beam bending
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Refractive index measurement of pharmaceutical powders in the short-wave infrared range using index matching assisted with phase imaging Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Cory Juntunen, Adam J. Rish, Carl Anderson, Yongjin Sung
Refractive index is a fundamental optical property of powder and a key input to the measurement of the size distribution using light scattering and the measurement of the absorption and scattering coefficients using diffuse reflectance spectroscopy. In this work, we demonstrate a method that combines index matching with phase imaging to determine the refractive index of complex powder particles at
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Investigating the thermal properties of single-grade engine oil (SAE 50) with the simultaneous addition of MWCNT and CuO nanoparticles Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Mohammad Hemmat Esfe, Davood Toghraie, Seyed Majid Motallebi, Saeed Esfandeh
This study examines the MWCNT-CuO (20%–80%)/SAE50 nanofluid (NF) by considering the temperature changes, solid volume fraction (SVF), and shear rate (SR) parameters. The temperature range is 30–50 °C and SVF of 0.0625, 0.125, 0.25, 0.5, 0.75 and 1%, and different SRs are investigated. Viscosity is obtained using a Brookfield CAP 2000+ viscometer. The results show that the NF has a non-Newtonian behavior
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Comparative evaluation of electrical resistance tomography, positron emission particle tracking and high-speed imaging for analysing horizontal particle-liquid flow in a pipe Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Chiya Savari, Kun Li, Mostafa Barigou
We evaluate three experimental techniques - electrical resistance tomography (ERT), positron emission particle tracking (PEPT) and high-speed imaging (HSI) – for analysing the local particle velocity field and spatial distribution in a horizontal particle-liquid pipe flow under varying conditions of solid concentration. A new ERT methodology is devised for estimating particle velocity, circumventing
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Study of the performance and flow field of a new spiral-roof cyclone separator Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Shiwei Yuan, Guogang Sun, Gang Cao, Yingyi Wu, Yunpeng Yue, Zhengyuan Song
This paper addresses deficiencies in the separating efficiency of conventional spiral-roof cyclone separators compared to flat-roof cyclone separators. A novel design is proposed, adding spiral guide vanes into the spiral-roof cyclone separator's annular space. The performance of the new spiral-roof cyclone separator is evaluated through cold-model experiments and numerical simulations and compared
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Effects of vibration on granular chute flow under low-gravity conditions Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Wenqing Niu, Hu Zheng, Wuwei Mao, Yu Huang
The essence of most geological hazards and industrial processes is gravity-driven flows of dense particles. In this research, we use the discrete element method to simulate the particle chute flow, and discuss the effect of vibration acceleration on the granular flow under different gravity conditions. The results indicate that vibration has a greater impact on the particle flow state under low-gravity
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Improving technofunctional performance and emulsion stability of ginsenoside microcapsules by using maltodextrin-inulin/lactose composite wall materials Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Tao Yang, Shanshan Han, Heying Xu, Mengping Ye, Tristan C. Liu, Jianguo Liu, Shuyan Lu, Chang Liu, Yaowei Liu, Peng Zhou
This study prepared ginsenoside microcapsules with different wall materials (maltodextrin, inulin, lactose) by spray drying based on ginsenoside emulsions, and evaluated the influence of maltodextrin-inulin/lactose ratios on the physicochemical characteristics of ginsenoside microcapsules and its reconstituted emulsions. For ginsenoside microcapsules with composite wall materials, the incorporation
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Inter-particle torque scaling in coarse grained DEM with rolling resistance and particle size distributions Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Yuze Hu, Ei L. Chan, Jun-ichi Watanabe, Masahiro Takezawa, Takuya Tsuji, Toshitsugu Tanaka, Kimiaki Washino
Many coarse grain models and scaling laws for Discrete Element Method (DEM) have been reported, but very few properly discussed the scaling laws of inter-particle torques. The Scaled-Up Particle (SUP) model, which is proposed in the authors’ previous work, is a promising coarse grain model based on a set of universal scaling laws. The present work is dedicated to investigating the validity of the SUP
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Deep learning-based online image analysis of the water suspension granulation process for 1,3,5-trinitro-1,3,5-triazacyclohexane-based polymer-bonded explosives Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Zhe Zhang, Qinghai Shu, Ziyang Guo, Xijuan Lv, Xianlong Ma, Shuai Zhao, Haoming Zou, Yansong Shi
Polymer-bonded explosives (PBXs) are typically prepared via water suspension granulation (WSG). However, few studies have reported on online monitoring during WSG. In this study, the WSG process for 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX)-based PBXs was monitored using online imaging and infrared detection technology. The images of the particles and droplets obtained during the WSG process were
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Heat transfer studies in a rotating drum containing non-spherical particles Powder Technol. (IF 5.2) Pub Date : 2024-03-11 Pradeep Muramulla, Sourabh Jogee, Satchit Nagpal, Partha S. Goswami, Srikanth Gopireddy, Thomas Profitlich, Nora Urbanetz
In chemical and pharmaceutical industries, rotating drums are commonly used as mixers, dryers, granulators, and reactors for processing particulate materials (Rutgers, 1965). Most of the earlier studies are limited to the spherical particles and have focused on understanding granular flow in drums operating under a rolling regime. However, there are numerous industrial operations in which non-spherical
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Effects of graphene irradiation plates and infrared temperature on the physiochemical, morphological, structural, and pasting properties of corn flour Powder Technol. (IF 5.2) Pub Date : 2024-03-08 Abdulaziz Nuhu Jibril, Jing Shiliang, Yifan Wang, Ibeogu Isaiah Henry, Abubakar Sabo Ahmad, Zaharaddeen Aminu Bello, Xubo Zhang, Kunjie Chen
In this study, corn grains were dried using a graphene far-infrared dryer and a conventional hot air dryer at three different infrared temperatures of 40, 50, and 60 °C. The aim was to evaluate the changes in various properties of corn flour that occur after drying. The gFIR experiment demonstrated that the drying temperature of 40 °C did not affect the morphology or internal structure of the corn
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Shaping technical catalyst particles in a bottom-spray fluidized bed Powder Technol. (IF 5.2) Pub Date : 2024-03-08 Ali M. Alkadhem, Hend Omar Mohamed, Shekhar R. Kulkarni, Torsten Hoffmann, Diego Zapater, Valentina E. Musteata, Evangelos Tsotsas, Pedro Castaño
This work aims to elucidate the particle growth mechanism during agglomeration using a bottom-spray fluidized bed process to produce technical catalysts. The influences of the fundamental operating parameters of the granulation process were investigated through (i) experiments in a newly designed small-scale bottom-spray fluidized bed reactor, (ii) morphological characterization of the catalytic particles
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Granular impedance and its role in energy transfer in vibro-fluidized low-friction granular materials Powder Technol. (IF 5.2) Pub Date : 2024-03-08 Hui Cai, Guoqing Miao
Impedance, a concept commonly applied to electrical circuits and simple mechanical systems, is seldom used in the context of multibody mechanical systems undergoing forced vibration. This study explored the impedance characteristics of vibro-fluidized low-friction granular materials experimentally. Owing to the consumption, storage, and release of mechanical energy by vibrated particles, the notions
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Comprehensive analysis of Chinese hamster ovary cell viability loss in mini-hydrocyclones Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Peng Yuan, Jianguo Yu, Liqun He, Li Ji, Xiaojie Wang, Kaiwei Chu, Shibo Kuang
Mini-hydrocyclones are gaining popularity as effective tools for cell retention in perfusion cultivation. As the most widely used mammalian cell for cultivation, Chinese hamster ovary (CHO) cells experience a decline in viability after passing through mini-hydrocyclones. The reasons behind the cell viability loss within mini-hydrocyclones are not understood. This study aims to comprehensively examine
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Numerical investigation of flow patterns in cuttings transport for extended-reach horizontal wells with rotation drillpipe Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Yi Sun, Xianzhi Song, Mengmeng Zhou, Zhengming Xu, Zhaopeng Zhu, Silin Jing, Hao Xiao, Yiqun Qi, Gensheng Li
During the drilling process of extended-reach horizontal wells, the formation of the cuttings bed at the bottom of the wellbore is prone to cause drilling sticking and pump accidents. A coupled method of Computational Fluid Dynamics and Discrete Element Method (CFD-DEM) is used here to study the flow patterns and transition of cuttings transport. Firstly, the model is validated with experimental results
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Anisotropic turbulence of dense and dilute phases of particles in fluidized risers characterized using four-way coupled second-order moment method Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Dan Sun
The gas-particle flow in a fluidized bed is characterized as a “core-annulus” pattern with transient clusters moving along the circulating fluidized bed riser. These clusters exist as regions with a higher concentration of particles and are surrounded by dispersed particles at lower concentrations. In this study, fluid dynamics of both the clusters and dispersed particles suspended in the risers were
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Experimental investigation of wet particle flow characteristics in a pseudo two-dimensional fluidized bed Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Zhiyang Ma, Yi Xu, Qiuya Tu, Haigang Wang, Raffaella Ocone
The flow characteristics of wet particles in a fluidized bed are extremely complicated due to the presence of moisture. It is essential to understand the complex behavior and flow characteristics of wet particles in the drying, coating and granulation process for optimizing the process efficiency and product quality. Thus, the flow characteristics of wet particles, such as pressure fluctuation, bubble
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Effect of oxidation degree of iron-based oxygen carriers on their mechanical strength Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Victor Purnomo, Robin Faust, Lidiya Abdisa Ejjeta, Tobias Mattisson, Henrik Leion
Iron-based oxygen carriers are currently one of the most popular choices for chemical looping processes. In order to minimize losses of oxygen carrier materials in the system, it is important to assess attrition characteristics. Furthermore, in chemical looping gasification where the oxygen transfer capacity needs to be limited, a higher reduction degree of oxygen carriers can be expected. As different
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Investigating the behavior of six limestones in presence of steam in dual interconnected fluidized beds, under operating conditions relevant for sorption-enhanced gasification Powder Technol. (IF 5.2) Pub Date : 2024-03-07 Fiorella Massa, Antonio Coppola, Fabio Montagnaro, Fabrizio Scala
This paper presents results on the behavior, in terms of CO capture capacity and attrition/fragmentation tendency, for six limestones processed in a dual interconnected fluidized beds system under operating conditions simulating those of sorption-enhanced gasification in presence of water vapor. Ten calcination/carbonation cycles have been carried out for each sorbent; in particular, carbonation has
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Study of the stochastic dynamics of particles in the coal screening based on the Markov process Powder Technol. (IF 5.2) Pub Date : 2024-03-06 Peng Chen, Long Huang, Miao Pan, Chenlong Duan, Haishen Jiang
The model of the stochastic dynamics for the screening and screen-penetration processes was developed based on the Markov process to reveal the mechanism of the coal screening effect. As a partial differential equation, the model of the stochastic dynamics describes the relationship between particle position in the direction, screening time, and particle screen-penetration probability. The obtained
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Amoxicillin adsorption from aqueous solution by Cu(II) modified lemon peel based activated carbon: Mass transfer simulation, surface area prediction and F-test on isotherm and kinetic models Powder Technol. (IF 5.2) Pub Date : 2024-03-05 Mohamad Firdaus Mohamad Yusop, Ahmad Zuhairi Abdullah, Mohd Azmier Ahmad
This study addresses concerns about amoxicillin (AMOX) in wastewater by enhancing its removal using Cu salt-modified lemon peel-based activated carbon (Cu-LPAC). The F-test is employed to assess variances between linear and non-linear methods for isotherm and kinetic models. The Polymath mass transfer (PMT) model is used to simulate kinetic data. AMOX adsorption onto Cu-LPAC increased by 38.93%, in
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Using vibration to attenuate the adhesive friction behavior between screw conveyor blades and wet coal particles Powder Technol. (IF 5.2) Pub Date : 2024-03-05 Kuidong Gao, Lisong Lin, Wenhe Zhang, Weipeng Xu, Liqing Sun
Screw conveyors are widely used in the transportation of materials in the mining field. The characteristics of material the water content and material shape differences make it different from other powdery and other uniform particle adhesion and friction phenomena, which affects the conveying performance. In order to improve the capability of conveying particles, this paper adds the consideration of
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Parameter optimization and spatio-temporal distribution of material for variable trajectory combined equal-thickness screen Powder Technol. (IF 5.2) Pub Date : 2024-03-05 Haishen Jiang, Yuhan Liu, Wenhao Li, Pengfei Wen, Long Huang, Jiale Yuan, Shijie Yu, Miao Pan, Chenlong Duan
Vibrating screen is important screening equipment used extensively in coal separation and utilization at the global scale. Traditional vibrating screen usually adopts a single vibration mode, which leads to poor screening effect. In this study, the equal-thickness screening theory was applied to the combined vibrating screen, and non-uniform frequency operation of the vibrating screen was achieved
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Numerical simulation of the optimization for the inlet structure of the furnace in the Phosphogypsum reduction process by sulfur vapor Powder Technol. (IF 5.2) Pub Date : 2024-03-05 Leilei Zhang, Yanxin Chen, Bo Zhao
Amidst the backdrop of carbon peaking and the pursuit of carbon neutrality targets, the co-production of sulfuric acid and cement from phosphogypsum through sulfur reduction in a dilute phase suspended gas system has emerged as the focal point in recent research, aiming to harness the high-value potential of solid waste phosphogypsum. This paper employs a combination of numerical simulation and pilot
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Granulation behaviour of high lactose dairy superconcentrates Powder Technol. (IF 5.2) Pub Date : 2024-03-02 Maheshchandra H. Patil, Laura T. O'Donoghue, Doll Chutani, Gaëlle Tanguy, Cécile Le Floch-Fouéré, Romain Jeantet, Eoin G. Murphy
Granulation of whey permeate (WP) and demineralised whey (DW) superconcentrates was evaluated by addition of powder using a high-shear mixer during which consumption of electrical current was monitored. Granulation of DW required 50% more energy than that of WP and the resulting DW granules were larger (∼2×) indicating greater resistance to fragmentation. Furthermore, addition of whey protein isolate
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Deep-learning based in-situ micrograph analysis of high-density crystallization slurry using image and data enhancement strategy Powder Technol. (IF 5.2) Pub Date : 2024-03-02 Muyang Li, Jian Liu, Tuo Yao, Zhenguo Gao, Junbo Gong
Process analytical technology (PAT) plays a crucial role in optimizing crystalline powder product qualities, improving process stability, and reducing experimental costs by enabling real-time monitoring and control of process variables during the crystallization process. process imaging and analysis have gained significant attention due to their capacity to provide abundant information through images
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Study on silage mixing device of King Grass stalk particles based on DEM simulation and bench test Powder Technol. (IF 5.2) Pub Date : 2024-03-02 Xiaolong Huan, Sibiao Li, Lei Wang, Decheng Wang, Yong You
This study designed a silage mixing device for King Grass stalk particles and optimized the core component, the blender, based on the discrete element method (DEM). Through simulation tests, the effect of different blender forms, blade lengths and blade orientations on the Lacey mixing index (LMI) was studied, and the structural form of the blender was selected as the inclined blade-same-up impeller
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Contributory roles of concentration and pH in CaCO3 growth inhibition for submicron particles synthesis with additive Ca2+ Powder Technol. (IF 5.2) Pub Date : 2024-03-02 Olukayode T. Majekodunmi, Sevgi Kilic, Ekrem Ozdemir
Excessive growth of CaCO precipitates is inhibited by additive Ca. Here, we report the influence of concentration and solution pH on the extent of growth inhibition. Equal volumes of equimolar CaCl and NaCO solutions were mixed and continuously dispersed in Ca(OH) solution, where Ca irreversibly adsorb on the precipitates. Compared to conditions where additive Ca are absent, this method can produce
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Computational and experimental approaches into molecular structure mechanism of ZQV coal and the COx gas releases during pyrolysis Powder Technol. (IF 5.2) Pub Date : 2024-03-02 Wei Feng, Shu Yan, Meilin Zhu, Na Li, Yingju Yang, Jingpei Cao, Yuhua Wu, Jianbo Wu, Hui Zhang, Qingjie Guo, Hongcun Bai
Understanding the structural features of coal and its reactive behaviors in thermal processing is the fundamental to achieve high-efficiency utilization of coal. However, the molecular structural features and the evolution characteristics at atomic scales in thermal processing remain unclear in the microscopic views, particularly for the low-rank coals, which usually exhibits high oxygen content with
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Dynamic damage mechanism of coal with high true triaxial stress level subject to water jets Powder Technol. (IF 5.2) Pub Date : 2024-03-01 Shirong Cao, Xiaojun Wang, Zhaolong Ge, Liang Zhang, Yang Yang, Huarui Hu
Deep mineral resources are abundant, and water jet technology has been proven to be an efficient means of developing this resource. In-situ stress is one of the prominent features in deep mines. However, the dynamic damage process of rock under the in-situ stress environment subject to water jets has not been revealed. Therefore, this study aims to fill this gap. For this study, coal breaking tests
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Numerical simulation for microstructure evolution of magnetorheological fluid based on combined disk DDA-LBM approach Powder Technol. (IF 5.2) Pub Date : 2024-03-01 Binyan Yu, Jian Ma, Xuan Zhao, Yisong Chen
In order to investigate the microstructure evolution characteristic of the magnetorheological fluid (MRF), a novel combined model coupling the disk discontinuous deformation analysis (disk DDA) model with the lattice Boltzmann method (LBM) called the disk DDA-LBM model is developed in this paper, and its acceptability is verified. After that, this new combined model is used to simulate the microstructure
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Understanding the pore size distribution of Ca(OH)2 for effective desulfurization under low-to-medium temperatures Powder Technol. (IF 5.2) Pub Date : 2024-03-01 Xiangli Fan, Haiming Wang, Yan Jin, Changfu You, Xuefu He, Xiaolei Qiao
The pore size distribution plays a crucial role in the gas-solid desulfurization reaction of Ca(OH), yet its impact on desulfurization performance is not fully understood, especially in low-to-medium temperature range (100–400 °C). This study examined the diffusion and adsorption characteristics of SO in Ca(OH) pores with different sizes by Monte Carlo Simulation and Molecular Dynamics Methods. The
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Additively manufactured structures with powder inclusions for controllable dissipation: The critical influence of packing density Powder Technol. (IF 5.2) Pub Date : 2024-03-01 Patrick M. Praegla, Thomas Mair, Andreas Wimmer, Sebastian L. Fuchs, Michael F. Zaeh, Wolfgang A. Wall, Christoph Meier
Particle dampers represent a simple yet effective means to reduce unwanted oscillations when attached to structural components. Powder bed fusion additive manufacturing of metals allows to integrate particle inclusions of arbitrary shape, size, and spatial distribution directly into bulk material, giving rise to novel metamaterials with controllable dissipation without the need for additional external
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Kinetics of crystal transformation of imatinib mesylate during formulation process: Selection of dry granulation in pharmaceutical process Powder Technol. (IF 5.2) Pub Date : 2024-02-29 Takanori Komai, Taichirou Togo, Hiromasa Uchiyama, Kazunori Kadota, Yuichi Tozuka
The change in crystal form of active pharmaceutical ingredients affects the physicochemical stability and the operability in formulation processes. In generic imatinib mesylate (IMT), the development of manufacturing methods that enable stable production while adhering to patent regulations is required. We developed tablets containing >80% IMT with unstable α-form crystals. The crystal transformation
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The collision behaviors of non-spherical regular particle-wall in three-dimensional space: Modeling investigation Powder Technol. (IF 5.2) Pub Date : 2024-02-29 Xiuwei Shi, Fangwei Xie, Jinjie Ji, Zuzhi Tian, Chunjie Xu, Anxin Sun
To accurately simulate the motion process of the particle-wall collision, collision experiments were conducted on the spherical particles and non-spherical regular particles. The rebound angles of the normal and tangent plane, the model factor, and the particle shape factor were proposed. Based on the rebound angle distribution functions and model factor functions, the collision recovery coefficient
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Regulating the crude oil–to–chemical process in a multizone fluidized bed reactor using unconventional catalyst formulations Powder Technol. (IF 5.2) Pub Date : 2024-02-28 Mengmeng Cui, Alla Dikhtiarenko, Shekhar R. Kulkarni, Tuiana Shoinkhorova, Isa Al Aslani, Mohammad Alabdullah, Jahirul Mazumder, Ruben Medina Flores, Arwa Alahmadi, Lujain Alfilfil, Isidoro Morales Osorio, Khalid Almajnouni, Jorge Gascon, Pedro Castaño
Crude oil catalytic cracking to petrochemicals in one step is a profitable pathway for future refineries yet it has significant hurdles. We investigated adding silicon carbide to the formulation and adjusting the crude oil–to–chemicals process in a multizone fluidized bed reactor by improving the morphology for hydrodynamics and thermal conductivity for heat transfer to promote the catalytic cracking
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The impact of different stirrer designs and mill orientations on the grinding efficiency Powder Technol. (IF 5.2) Pub Date : 2024-02-28 S. Cayirli, H.S. Gokcen, N. Yuce
The primary objective of this research is to examine the impact of various stirrer designs in different mill orientations on the efficiency of calcite grinding in a dry stirred mill. In the context of the research, a series of batch grinding experiments were performed using a laboratory-scale stirred mill that could be oriented vertically or horizontally. Four distinct stirrer designs, namely 3-pin
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Study on agglomeration mechanism of ammonium paratungstate pentahydrate and controllable preparation of pure monodisperse crystals Powder Technol. (IF 5.2) Pub Date : 2024-02-28 Kangli Li, Junjie Li, Haoyu Peng, Yanbo Liu, Xuemei Wei, Runpu Shen, Shuang Xu, Chunrong Yu, Mingyang Chen, Ling Zhou, Junbo Gong
Ammonium paratungstate (APT) is an important intermediate for the production of tungsten-containing products. However, its morphology problems caused by crystal agglomeration affect its properties. In this paper, the mechanism of agglomeration during the evaporative crystallization of APT was studied. The experimental result reveals that the temperature, as a critical parameter, significantly affects
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Enhancement of inhaled micronized powder flow properties for accurate capsules filling Powder Technol. (IF 5.2) Pub Date : 2024-02-27 Eva Gresse, Justine Rousseau, Myriam Akdim, Audrey du Bois, Anna Lechanteur, Brigitte Evrard
Particle engineering holds significant promise in developing high-performance inhaled powders. The spray-drying technology leads to the optimization of particle properties, enhancing aerosolization capabilities. However, the development of such inhalation powders introduces challenges related to cohesive forces due to, among others, the small particle size. Our study aims to find an easy industrial
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Determination of the size of representative volume element for gap-graded granular materials Powder Technol. (IF 5.2) Pub Date : 2024-02-27 Xiusong Shi, Zihao He, Jidong Zhao, Jiaying Liu
Gap-graded granular soils have a wider grain size distribution and more heterogeneous fabric structure than normal soils. It is critical to choose the sample size of element tests in a faithful and repeatable manner. The Discrete Element Method (DEM) is utilized to determine the size of representative volume element (RVE) of gap-graded mixtures with varying particle size distributions. Over seven hundred
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Detoxification of chromium slag using corn stalk for the hierarchical preparation of ultrafine aluminum hydroxide and iron hydroxide Powder Technol. (IF 5.2) Pub Date : 2024-02-27 Hang Jin, Bihe Yuan, Xichen Xu, Qingquan Ding, Yue Kong, Man Yang, Chao Liu, Shibin Nie
The harmless treatment and resource utilization of chromite ore processing residue (COPR), a consequential byproduct of chromate production, carry profound significance. In this study, corn stalk, an agricultural waste, was used to generate reducing substances through high-temperature and vacuum treatments and was successfully used to detoxify COPR. The acid leaching method combined with multi-step
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Novel insights into the effect of cone structure on the classification performance of dual-cone hydrocyclones Powder Technol. (IF 5.2) Pub Date : 2024-02-27 Qiang Zhao, Min Sun, Baoyu Cui, Yanbai Shen, Yuqing Feng, Junwu Zhou
The classification process in hydrocyclones is affected by many factors, with the cone angle being recognized as a critical parameter determining the classification performance. In the context of recycling iron ore tailings, this paper primarily focuses on the influence of cone angles and their combination sequences on the classification performance of quartz particles within a dual-cone hydrocyclone
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Numerical investigation on flow and heat transfer of the rotating spherical particle in a supercritical water crossflow environment Powder Technol. (IF 5.2) Pub Date : 2024-02-24 Yuqi Shang, Lingyue Meng, Chuan Zhang, Zhiwei Ge, Liejin Guo
The supercritical water gasification reactor provides a green and efficient method for the utilization of organic resources such as coal and biomass. It is important to note that collision-induced particle rotation in the reactor will affect the flow and heat transfer characteristics between the particles and the fluid. At present, there is a lacking consideration of particle rotation in the supercritical
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Research on enhancement of screening performance of a novel drum screen based on the Discrete Element Method simulation Powder Technol. (IF 5.2) Pub Date : 2024-02-24 Jinpeng Qiao, Keyu Hu, Jinshuo Yang, Yanze Wang, Jianrong Liu, Enhui Zhou, Haishen Jiang, Chenlong Duan
Screening is one of the most basic technologies for size classification of granular materials. Based on discrete element method simulations, a new built-in component was developed to address the problems of particle piling and poor segregation in drum screening process, and the particle dynamics and spatial distribution were carefully investigated. The results showed that, increasing the blade length
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CFD-DEM investigation of the dispersion of elongated particles in the Turbuhaler® aerosol device Powder Technol. (IF 5.2) Pub Date : 2024-02-24 Qixuan Zhu, Dazhao Gou, Hak-Kim Chan, Runyu Yang
Elongated drug particles have the potential to be superior to spherical drug particles for delivery to the deep lung due to their increased ability to align with the airflow. However, the performance of elongated particles within dry powder inhalers (DPIs) has been largely unexplored. This paper presented a CFD-DEM study to simulate the dispersion of elongated active pharmaceutical ingredient (API)
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Dynamic evaluation of ash deposition behavior and parametric study using an inverse distance weighted interpolation dynamic mesh method Powder Technol. (IF 5.2) Pub Date : 2024-02-24 Ran An, Xiaobing Zhang
Ash deposition is a critical issue concerning the energy utilization and safety operation of heat exchangers. Efficient dynamic evaluation of deposition morphology and reasonable structural parameters contribute to the deposition prediction and the improvement of deposition resistance. In this work, a transient deposition model is established to investigate the dynamic deposition behavior and comprehensive
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Spray dried powder of common fruit juices: Enhancement of main properties Powder Technol. (IF 5.2) Pub Date : 2024-02-23 Alberto Baldelli, Joana Pico, Meng Wai Woo, Simone Castellarin, Anubhav Pratap-Singh
Low retention of bioactive compounds caused by high stickiness associated with sugar-rich fluids are of concern in the industrial production of spray-dried fruit powders. An alternative is spray-freeze-drying SFD, which operates under low temperatures but subsequent handling can be impacted by high hygroscopicity. This study explores the use of bulking (maltose and maltodextrin) and wall materials
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Electrospray fabrication of CL-20 composite microspheres for high-energy EFIs: Microstructure modulation and performance optimization Powder Technol. (IF 5.2) Pub Date : 2024-02-23 Chenhe Feng, Baoyun Ye, Yilin Ma, Wangjian Cheng, Songchao Shi, Fengqi Zhao, Chongwei An, Jingyu Wang
The utilization of high-energy explosives in Explosive Foil Initiators (EFIs) holds paramount significance. In this study, CL-20 composite microspheres were successfully prepared by electrostatic spraying technology, demonstrating narrow size distribution and high sphericity at 5% binder content. The strategy of introducing NC in GAP and F effectively improved the porosity, specific surface area and
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Particle shape and clogging in fluid-driven flow: A coupled CFD-DEM study Powder Technol. (IF 5.2) Pub Date : 2024-02-23 Zemin Qiu, Qinghua Xiao, Hao Yuan, Xiangyu Han, Congming Li
Clogging is a critical issue in the flow of particulate matter. This study uses the computational fluid dynamics coupled with discrete element method (CFD-DEM) to investigate how particle shape affects clogging behavior. Settling tests were conducted to confirm the dynamic behavior of irregular particles, modeled using the bonded-sphere method, in flow. The particle shape features were classified into
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Efficient DEM modeling of solid flavor particle mixing in a rotary drum Powder Technol. (IF 5.2) Pub Date : 2024-02-23 Rutger van Sleeuwen, Stefan Pantaleev, Mohammadreza Ebrahimi, Leo Feng
An efficient Discrete Element Method (DEM) modeling methodology for mixing of solid flavor particles in a rotating drum is presented. Machine learning and optimization algorithms are combined with geometric scaling and particle size distribution trimming to produce several orders of magnitude reduction in computational expense relative to the traditional approach of modeling at the physical system
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Development of a centrifugal dry magnetic separator for separation of fine magnetite ore Powder Technol. (IF 5.2) Pub Date : 2024-02-22 Fan Yi, Luzheng Chen, Xiaoqian Liu, Jianwu Zeng, Zixing Xue
Dry magnetic separation (DMS) has been used for separating large magnetic ores, but it produces a low selectivity for fine particles, due to the challenge of dispersing feed materials. A novel full-scale centrifugal dry magnetic separator (cDMS) was developed, and in this investigation, it was used to process a fine magnetite ore, which assays 28.57% Fe in magnetite. The separation results indicate