Particuology最新文献_第9页

The transition to turbulent fluidization in a gas-solid fluidized bed operating from ambient temperature to 1600 °C 从环境温度到 1600 °C 的气固流化床向湍流化的过渡

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-26 DOI: 10.1016/j.partic.2024.06.008

Qingjin Zhang , Liangliang Fu , Guangwen Xu , Dingrong Bai

{"title":"The transition to turbulent fluidization in a gas-solid fluidized bed operating from ambient temperature to 1600 °C","authors":"Qingjin Zhang , Liangliang Fu , Guangwen Xu , Dingrong Bai","doi":"10.1016/j.partic.2024.06.008","DOIUrl":"https://doi.org/10.1016/j.partic.2024.06.008","url":null,"abstract":"<div><p>Turbulent fluidized bed proves effective in industrial processes due to superior heat and mass transfer and chemical reaction performance. However, understanding the transition to turbulent fluidization remains limited, especially at temperatures exceeding 1000 °C, making it challenging to develop high-temperature fluidized bed applications. This paper presents an experimental investigation on the turbulent fluidization onset velocity (<em>U</em><sub>c</sub>), measured in a 30 mm diameter bed using corundum particles with average diameters from 0.68 mm to 1.58 mm in temperatures from ambient to 1600 °C. Experimental results reveal that <em>U</em><sub>c</sub> increases with temperature up to 600 °C, stabilizes within the 600–1200 °C range, and then decreases above 1200 °C, demonstrating the varying relative significance of hydrodynamic and interparticle forces at different temperatures. To help design and operate high-temperature applications of turbulent fluidization, we developed <em>U</em><sub>c</sub> correlations based on experimental data from both literature sources and this study, covering temperatures of up to 1600 °C and particles of Groups A to D.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 111-124"},"PeriodicalIF":4.1,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141480338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and theoretical analysis of loading characteristics of electret filter media for charged particles 带电粒子驻极体过滤介质负载特性的实验和理论分析

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-21 DOI: 10.1016/j.partic.2024.06.007

Yiqi Cai , Rongrong Cai , Lizhi Zhang

{"title":"Experimental and theoretical analysis of loading characteristics of electret filter media for charged particles","authors":"Yiqi Cai , Rongrong Cai , Lizhi Zhang","doi":"10.1016/j.partic.2024.06.007","DOIUrl":"https://doi.org/10.1016/j.partic.2024.06.007","url":null,"abstract":"<div><p>The degradation of filtration performance in electret filter media during usage poses a significant challenge. Pre-charging of aerosols has been identified as an effective method to mitigate this issue. However, the effects of particle charging characteristics on the loading characteristics of electret filters still need a comprehensive understanding. In this study, a needle-cylinder corona charger was employed to pre-charge aerosols, and the particle charge state was determined by multiphysics simulation. The effects of particle charge polarity and charge quantity on the loading performance of the electret filter were quantitatively investigated. The results showed that the particle charge polarity had a negligible impact on the loading performance under the condition of the equivalent particle charge quantity. In addition, the charged particles effectively improved the efficiency degradation during the loading process of electret media, with higher charge quantities resulting in more pronounced improvements. The electrostatic attenuation factor showed a negative exponential correlation with the particle charge quantity. This was attributed to the uneven particle deposition on fiber surface due to the attraction of charged particles by the opposite charges on the electret fibers, which alleviated the effect of electrostatic shielding.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 87-98"},"PeriodicalIF":4.1,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile formation of hierarchical magnesium silicate hydrate microspheres as an adsorbent for the textile dyes 轻松形成作为纺织染料吸附剂的分层硅酸镁水合物微球

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-18 DOI: 10.1016/j.partic.2024.06.005

Tin Kyawoo , Naveed Karim , Chao Jiang , Saeed Ahmed , Weiliang Tian , Huiyu Li , Yongjun Feng

{"title":"Facile formation of hierarchical magnesium silicate hydrate microspheres as an adsorbent for the textile dyes","authors":"Tin Kyawoo , Naveed Karim , Chao Jiang , Saeed Ahmed , Weiliang Tian , Huiyu Li , Yongjun Feng","doi":"10.1016/j.partic.2024.06.005","DOIUrl":"https://doi.org/10.1016/j.partic.2024.06.005","url":null,"abstract":"<div><p>Hierarchical porous magnesium silicate hydrate (MSH) microspheres composed of sheets are successfully developed under facile conditions using a hard template. The role of hexadecyltrimethylammonium bromide (CTAB) on the formation and adsorption behavior was also observed for the methyl orange and methylene blue. The formed MSH possesses a surface area of 453.24 m<sup>2</sup>/g, an average pore size of 6.38 nm, and a pore volume of 0.75 cm<sup>3</sup>/g without CTAB. Based on the role of CTAB and the change in the ratio of Mg/Si, the MSH retained its sphere-like structure with a variation in pore parameters. The formed MSH was used as an adsorbent to remove methylene blue and methyl orange. The pseudo-second-order kinetic and Langmuir Isotherm models are well-fitted, with a 256.4 mg/g removal capacity and 84.2 mg/g for methylene blue and methyl orange, respectively. The modified MSH with CTAB played a positive role for the methyl orange and a negative role for the methylene blue regarding removal performance.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 99-110"},"PeriodicalIF":4.1,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of rice grain breakage process based on Tavares UFRJ model 基于塔瓦雷斯 UFRJ 模型的稻谷破碎过程模拟

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-18 DOI: 10.1016/j.partic.2024.05.019

Shaohang Shen , Shouyu Ji , Dan Zhao , Yanlong Han , Hao Li , Ze Sun , Zhuozhuang Li , Anqi Li , Wenyu Feng , Jiaming Fei , Fuguo Jia , Yang Li

引用次数: 0

Experimental and numerical investigation of iron ore pellet firing using coupled CFD-DEM method 使用 CFD-DEM 耦合方法对铁矿石球团烧制进行实验和数值研究

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-17 DOI: 10.1016/j.partic.2024.05.018

Hafez Amani , Eskandar Keshavarz Alamdari , Mostafa Keshavarz Moraveji , Bernhard Peters

{"title":"Experimental and numerical investigation of iron ore pellet firing using coupled CFD-DEM method","authors":"Hafez Amani , Eskandar Keshavarz Alamdari , Mostafa Keshavarz Moraveji , Bernhard Peters","doi":"10.1016/j.partic.2024.05.018","DOIUrl":"https://doi.org/10.1016/j.partic.2024.05.018","url":null,"abstract":"<div><p>Iron ore pellets are the main feedstock in ironmaking processes. While extensive research has addressed numerical modeling of the iron ore pellet induration process, little effort has been made to describe the intricate thermochemical processes occurring within the reactor starting from the pellet and particularly at the intra-particle scale. In this regard, discrete-continuous methods like CFD-DEM can generate more realistic, irregular particle assemblies, which leads to significantly more accurate predictions of voidage variation, wall effects, temperature distribution, and associated mass transfer phenomena. This study presents a numerical model based on computational fluid dynamics (CFD) coupled with the discrete element method (DEM) to simulate the thermal induration process of iron ore pellets. The presented model solving heat, mass, and momentum conservation equations for both continuous and discrete phases, provides detailed information on the thermochemical aspects of the process. Pilot-scale induration experiment was conducted to validate model predictions in terms of thermal history and final conversion fraction. It was found that inlet charge specifications, such as particle and pellet size, significantly impact the productivity of pelletizing plants, highlighting the potential of the presented model to optimize the process and improve plant productivity.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 75-86"},"PeriodicalIF":4.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Steady-state multiscale CFD simulation of a circulating fluidized bed riser 循环流化床立管的稳态多尺度 CFD 模拟

IF 4.1 2区材料科学

Particuology Pub Date : 2024-06-13 DOI: 10.1016/j.partic.2024.06.004

Zhaojie Ke , Yujie Tian , Fei Li , Bona Lu , Wei Wang

引用次数: 0

Voidage correction method for DEM study of 3D pebble flows in a bed of cycloidal base 用于摆线基床中三维卵石流 DEM 研究的空隙修正方法

IF 3.5 2区材料科学

Particuology Pub Date : 2024-06-10 DOI: 10.1016/j.partic.2024.06.003

Zirui Xia , Minglei Shi , Quan Zou , Nan Gui , Xingtuan Yang , Jiyuan Tu , Shengyao Jiang

引用次数: 0

Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature 高温下颗粒床过滤器中细小颗粒过滤特性的数值研究

IF 3.5 2区材料科学

Particuology Pub Date : 2024-06-07 DOI: 10.1016/j.partic.2024.05.017

Kangning Zhu, Jie Cai, Yuan Li, Xiaoyou Shen, Jianfei Xi, Yunjun Wang, Zhongzhu Gu

{"title":"Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature","authors":"Kangning Zhu, Jie Cai, Yuan Li, Xiaoyou Shen, Jianfei Xi, Yunjun Wang, Zhongzhu Gu","doi":"10.1016/j.partic.2024.05.017","DOIUrl":"10.1016/j.partic.2024.05.017","url":null,"abstract":"<div><p>Granular bed filter (GBF) has become one of the current research hot topics due to its excellent performance in removing fine particles. In this paper, a three-dimensional fixed bed GBF filtration model was established and its accuracy was verified. Then, the GBF filtration performance at high temperature were studied. The results demonstrate that elevating the temperature diminishes the filtration efficiency, albeit to a limited extent. The increasing of inlet gas velocity can significantly improve pressure drop for GBF and the filtration efficiency for fine particles of sizes larger than 5 μm. As the diameter of stacked granular particle diameter grows, the filtration efficiency and pressure drop drops. The density of fine particles almost does not affect the filtration efficiency for fine particles of 1∼7 μm, but a higher density leads to a higher filtration efficiency for fine particles of sizes bigger than 9 μm. Additionally, as the fine particles size increases, the change of the filtration efficiency roughly goes through three stages: Stage 1: the filtration efficiency is basically unchanged; Stage 2: the filtration efficiency increases rapidly; Stage 3: the filtration efficiency increases steadily, but the rate of increase slows down. With the increase of the fine particles Stokes number, the filtration efficiency of GBF will pass through two phases of stabilization and rapid increase.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 41-53"},"PeriodicalIF":3.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141398414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boosting Li-ion storage kinetics via constructing layered TiO2 anode 通过构建层状二氧化钛阳极提高锂离子存储动力学

IF 3.5 2区材料科学

Particuology Pub Date : 2024-06-06 DOI: 10.1016/j.partic.2024.06.002

Jiyue Hou , Fei Wang , Enfeng Zhang , Ying Wang , Peng Dong , Yunxiao Wang , Yiyong Zhang , Xue Li , Yingjie Zhang

{"title":"Boosting Li-ion storage kinetics via constructing layered TiO2 anode","authors":"Jiyue Hou , Fei Wang , Enfeng Zhang , Ying Wang , Peng Dong , Yunxiao Wang , Yiyong Zhang , Xue Li , Yingjie Zhang","doi":"10.1016/j.partic.2024.06.002","DOIUrl":"https://doi.org/10.1016/j.partic.2024.06.002","url":null,"abstract":"<div><p>Due to the typical intercalation-deintercalation mechanism, TiO<sub>2</sub> holds great promise as a sustainable anode for next-generation lithium-ion batteries (LIBs). However, commercial TiO<sub>2</sub> (C–TiO<sub>2</sub>) is granular and shows slow ionic conductivity, which greatly hinders its development due to sluggish kinetics, leading to low reversible capacity and inferior rate capability. In this study, a two-dimensional layered TiO<sub>2</sub> (L-TiO<sub>2</sub>) anode is prepared via a one-step calcination process, which can effectively shorten the lithium ions diffusion path and improve its lithium ions conductivity. We elucidated the enhanced electrochemical performance of L-TiO<sub>2</sub> as an anode in LIBs through pseudocapacitive acceleration of lithium ions intercalation and deintercalation using various characterization techniques, including different scan rate cyclic voltammetry tests, in situ electrochemical impedance spectroscopy, in situ Raman spectroscopy, and in situ X-ray diffraction. In comparison to C–TiO<sub>2</sub> material, L-TiO<sub>2</sub> material showcases remarkable electrochemical performance, achieving a capacity of 166 mAh/g after 100 cycles at 0.1 C. Additionally, the lithium-ion diffusion coefficient calculated for the L-TiO<sub>2</sub> is two orders of magnitude greater, underscoring its potential as a negative electrode material for LIBs.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 22-29"},"PeriodicalIF":3.5,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141325595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of micro spherulitic particles of carbamazepine-hesperetin cocrystal via QESD with enhanced manufacturability and dissolution 通过 QESD 制备卡马西平-阿司佩林共晶体的微球状颗粒，提高其可制造性和溶解性

IF 3.5 2区材料科学

Particuology Pub Date : 2024-06-04 DOI: 10.1016/j.partic.2024.06.001

Jinbo Ouyang , Lishan Liu , Zichen Ning , Zhuoshan Gong , Limin Zhou , Feiqiang He , Zhi Gao , Li Xu , Shichao Du , Huaiyu Yang

{"title":"Fabrication of micro spherulitic particles of carbamazepine-hesperetin cocrystal via QESD with enhanced manufacturability and dissolution","authors":"Jinbo Ouyang , Lishan Liu , Zichen Ning , Zhuoshan Gong , Limin Zhou , Feiqiang He , Zhi Gao , Li Xu , Shichao Du , Huaiyu Yang","doi":"10.1016/j.partic.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.partic.2024.06.001","url":null,"abstract":"<div><p>Granulation is an effective method for improving the flowability of drugs, particularly when they are in needle form. Carbamazepine-hesperetin (CBZ-HPE) cocrystal is a needle-like crystal with low solubility and poor flowability, which limits its application. To address this issue, this study aimed to obtain CBZ-HPE microspheres using the quasi-emulsion solvent diffusion (QESD) technique. The preparation process was monitored using polarized light microscopy, and the formation mechanism was elucidated using the radial distribution function (RDF). The microspheres were extensively characterized using PXRD, DSC, TGA, and SEM. Furthermore, the effects of surfactants, contents, and rotational speeds on the morphology and particle size distribution of microspheres were analyzed to determine the optimal experimental conditions. Based on these findings, naringenin and quercetin, the active ingredients of traditional Chinese medicine, were chosen to successfully prepare CBZ-HPE multicomponent microspheres. This research provides a foundation for increasing drug powder properties and drug conjugation through the preparation of microspheres.</p></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"93 ","pages":"Pages 11-21"},"PeriodicalIF":3.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141294279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0