Particuology最新文献_第10页

Preface to special issue: Image is everything 特刊前言：形象就是一切

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-29 DOI: 10.1016/j.partic.2025.04.013

Christopher R.K. Windows-Yule, Jonathan Seville (Guest Editors), Kay Buist, Giulia Finotello (Guest Editors), Kia Taghizadeh (Guest Editor)

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Alumina intermittent drying using new draft tubes for scaling up conical spouted beds 利用新型引水管扩大锥形喷床的氧化铝间歇干燥

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-29 DOI: 10.1016/j.partic.2025.05.015

Idoia Estiati , Ronaldo Correia de Brito , Mikel Tellabide , Maider Bolaños , Xabier Sukunza , Fabio Bentes Freire , José Teixeira Freire , Martin Olazar

{"title":"Alumina intermittent drying using new draft tubes for scaling up conical spouted beds","authors":"Idoia Estiati , Ronaldo Correia de Brito , Mikel Tellabide , Maider Bolaños , Xabier Sukunza , Fabio Bentes Freire , José Teixeira Freire , Martin Olazar","doi":"10.1016/j.partic.2025.05.015","DOIUrl":"10.1016/j.partic.2025.05.015","url":null,"abstract":"<div><div>Novel draft tubes have been assessed to scale up the spouted bed technology. Accordingly, alumina drying runs have been conducted using different configurations (without tube and with open-sided and nonporous tubes) under intermittent strategies consisting in alternating periods of drying and periods of reduction or interruption of the air flow rate, and they have been compared with continuous drying. Furthermore, the influence the draft tubes have on the drying performance and energy requirements in the drying process has been evaluated. The results allow inferring that intermittent drying considerably decreases both drying time and energy requirements. Moreover, the new draft tubes improved the drying of alumina, as a similar energy efficiency than without draft tube was attained with lower specific energy consumption, which is essential to reduce the high-energy demand in the drying process and mitigate climate change. These findings, along with the stability the new tubes provided to the process, involve a further step in the scale up of spouted beds for industrial operations.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 141-150"},"PeriodicalIF":4.1,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222510","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}

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Effects of particle size reduction due to wear on heat transfer in a fluidized bed: A CFD-DEM study 磨损引起的颗粒尺寸减小对流化床传热的影响：CFD-DEM研究

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-29 DOI: 10.1016/j.partic.2025.05.017

Haoyuan Bo, Yao Fu, Yingjuan Shao, Wenqi Zhong

{"title":"Effects of particle size reduction due to wear on heat transfer in a fluidized bed: A CFD-DEM study","authors":"Haoyuan Bo, Yao Fu, Yingjuan Shao, Wenqi Zhong","doi":"10.1016/j.partic.2025.05.017","DOIUrl":"10.1016/j.partic.2025.05.017","url":null,"abstract":"<div><div>Particle wear behavior significantly affects combustion stability and operational costs. To reveal the underlying effects of particle size reduction on the heat transfer process, which are difficult to obtain experimentally, this study proposes a novel particle wear model. The model is experimentally calibrated and subsequently incorporated into a heat-fluid CFD-DEM platform. This is the first study to numerically investigate the impact of particle size reduction due to wear on the heat transfer characteristics in a fluidized bed. This study investigates the fluid dynamic and thermal behavior of particles after wear. It provides information on the system's macroscopic gas-solid flow regime (characterized by particle size and temperature distribution), the time-varying rules of particle wear and fragmentation rate, bed particle size distribution, and the relationship between single-particle diameter and temperature under different wear mechanisms. The primary innovation of this work lies in assessing the impact of different wear mechanisms on the key parameters (heating rate and temperature uniformity) during the heating process. Based on these findings, practical guidance is provided for optimizing industrial processes (adjusting particle flow patterns, optimizing debris distribution, and enhancing temperature monitoring at the bed bottom). The results reveal that different wear mechanisms lead to distinct distribution characteristics of particles within the bed. The abrasion mechanism enhances the heat transfer process, resulting in an approximately 16 % increase in the heating rate coefficient (C) and a 6 % improvement in temperature uniformity. In contrast, the fragmentation mechanism weakens the heat transfer process, leading to an approximately 33 % decrease in C and a 21 % reduction in temperature uniformity.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 176-192"},"PeriodicalIF":4.1,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222509","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

Parameter identification in the bismuth homogeneous nucleation model for population balance 铋族平衡均匀成核模型的参数辨识

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-28 DOI: 10.1016/j.partic.2025.05.012

Cheng Shang , Song He , Zuwei Xu , Frank Einar Kruis , Haibo Zhao

引用次数: 0

Microdroplet cryo-crystallization for producing budesonide microparticles with optimized physicochemical properties 微滴冷冻结晶法制备物理化学性能最佳的布地奈德微粒

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-27 DOI: 10.1016/j.partic.2025.05.014

Shengzheng Guo, Ziyi Liu, Yuxin Zhang, Jingkang Wang, Zhenguo Gao, Junbo Gong

{"title":"Microdroplet cryo-crystallization for producing budesonide microparticles with optimized physicochemical properties","authors":"Shengzheng Guo, Ziyi Liu, Yuxin Zhang, Jingkang Wang, Zhenguo Gao, Junbo Gong","doi":"10.1016/j.partic.2025.05.014","DOIUrl":"10.1016/j.partic.2025.05.014","url":null,"abstract":"<div><div>Inhalation therapies are pivotal for treating pulmonary diseases, yet their efficacy critically depends on the physicochemical properties of drug particles. This study introduces a novel microdroplet cryo-crystallization (MCC) technique to fabricate inhalable budesonide (BUD) particles. The MCC process combines rapid cryogenic freezing of drug-loaded microdroplets in liquid nitrogen, followed by additive-guided suspension crystallization in an anti-solvent environment. Cryogenic freezing suppresses molecular mobility and prevents aggregation, preserving uniform solute distribution. Subsequent controlled crystallization in the anti-solvent system enables precise tailoring of nanoparticle morphologies while avoiding supersaturation-driven amorphization. Systematic optimization identified MCC conditions yielding BUD ultrafine crystals with a volume median diameter of 3.0 μm, >94 % sphericity, >98 % crystallinity, and minimal hygroscopicity (<0.5 %). Compared to conventional air-jet milled BUD (∼90 % crystallinity and ∼3 % hygroscopicity), the MCC-engineered particles exhibit significantly improved physicochemical stability and dissolution performance (94 % in 180 min). The MCC strategy decouples cryogenic freezing and phase transformation, avoiding top-down limitations (e.g., milling-induced amorphization) and bottom-up issues (uncontrolled nucleation/aggregation) to achieve scalable and highly precise production of inhalable drug particles.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 128-140"},"PeriodicalIF":4.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222506","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

A new transient nonuniformity index for the feed injection zone of a multiphase fluidized bed reactor 多相流化床反应器进料区的一种新的瞬态不均匀性指标

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-24 DOI: 10.1016/j.partic.2025.05.002

Shuangzhu Kong , Min Cai , Jian Li , Feng Cheng , Chunxi Lu , Mengxi Liu , Chaowei Liu , Zhifeng Wang , Kaijun Hou

{"title":"A new transient nonuniformity index for the feed injection zone of a multiphase fluidized bed reactor","authors":"Shuangzhu Kong , Min Cai , Jian Li , Feng Cheng , Chunxi Lu , Mengxi Liu , Chaowei Liu , Zhifeng Wang , Kaijun Hou","doi":"10.1016/j.partic.2025.05.002","DOIUrl":"10.1016/j.partic.2025.05.002","url":null,"abstract":"<div><div>In the feed injection zone of a multiphase fluidized bed reactor, nonuniform distribution exists due to the introduction of feed nozzle jets and circulating catalyst, which ultimately have an impact on the performance of the reactor. The transient sectional nonuniformity index (<em>TSNI</em>) is proposed as a new index to quantify the nonuniformity of solid distribution in both radial and circumferential dimensions at the same time, based on the transient solids holdup data in the feed zone. The temporal and spatial distributions of <em>TSNI</em> can more accurately reflect the changes in the real-time gas-solid distribution uniformity of the cross-sections and the efficiency of gas-solid contact in the feed injection zone. The feed injection zone can be divided into three regions according to the characteristics of <em>TSNI</em>: the bubble-influenced zone, the jet-influenced zone, and the acceleration zone. According to the numerical simulation results, it was analyzed that <em>TSNI</em> is highly correlated with operating conditions, such as nozzle gas velocity and catalyst circulation rate.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 164-175"},"PeriodicalIF":4.1,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222508","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

Predicting ash accumulation in industrial systems using machine learning: Enhancing maintenance and operational efficiency 利用机器学习预测工业系统积灰：提高维护和运行效率

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-22 DOI: 10.1016/j.partic.2025.05.008

Seyed Hamed Godasiaei

{"title":"Predicting ash accumulation in industrial systems using machine learning: Enhancing maintenance and operational efficiency","authors":"Seyed Hamed Godasiaei","doi":"10.1016/j.partic.2025.05.008","DOIUrl":"10.1016/j.partic.2025.05.008","url":null,"abstract":"<div><div>Predicting ash accumulation in industrial environments is crucial for improving operational efficiency, enabling proactive maintenance, reducing downtime, and optimizing plant performance. Understanding of these processes requires the analysis of key parameters, including time, heat flux, particle size, velocity, excess air ratio, furnace temperature, heat load, and oxide concentrations, with a particular focus on deposition thickness. Traditional methods often fail to capture the complexity of these interactions, necessitating innovative approaches for accurate prediction and analysis. The experimental data, along with four algorithms, i.e. Support Vector Regression (SVR), Random Forest (RF), Deep Neural Network (DNN), and Extreme Gradient Boosting (XGBoost), were employed to analyze 20 features, providing a robust evaluation of their predictive capabilities. Furthermore, the use of SHAP (SHapley Additive Explanations) values introduces a novel dimension to the study, enabling interpretability and transparency in understanding the contribution of each feature to the model's predictions. The results demonstrate exceptional predictive accuracy for the RF and XGBoost models, achieving an R<sup>2</sup> value of 0.99 and minimal mean absolute errors (MAE). A novel comparison of training times reveals that SVR outperforms the other algorithms in speed due to its simpler structure, making it highly efficient for real-time applications. Correlation analysis identifies strong relationships between deposition thickness and key parameters such as time, heat flux, and deposition probability at varying surface temperatures. Time directly influences deposition thickness, as particles accumulate and sinter over prolonged operation. Heat flux drives particle movement through thermophoresis, affecting surface adhesion and increasing deposition probability. Surface temperature modulates particle adhesion and slag viscosity, with optimal temperatures maximizing stickiness and deposition probability.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 41-54"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170519","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

Narrowing the particle size distribution of powder coatings via a reformed classifying cyclone: Improved flowability and film qualities 通过改进的分级旋流器缩小粉末涂料的粒度分布：改善流动性和薄膜质量

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-22 DOI: 10.1016/j.partic.2025.05.009

Junqing Xie , Jing Fu , Yuanyuan Shao , Haiping Zhang , Hui Zhang , Jesse Zhu

{"title":"Narrowing the particle size distribution of powder coatings via a reformed classifying cyclone: Improved flowability and film qualities","authors":"Junqing Xie , Jing Fu , Yuanyuan Shao , Haiping Zhang , Hui Zhang , Jesse Zhu","doi":"10.1016/j.partic.2025.05.009","DOIUrl":"10.1016/j.partic.2025.05.009","url":null,"abstract":"<div><div>In this study, a new design of classifying cyclone separator with secondary air inlet and air guider (SAG type) was proposed to narrow the particle size distribution (PSD). CFD simulation reveals that only adding a secondary air inlet (SA type) at the bottom of the cyclone will create a strong updraft. After adding an air guider, the rotating air enhances the strength of the outer vortex, which is conducive to the particle collection. The experiment results also verify these findings. SA cyclone separator effectively narrows the PSD, but the particle collection efficiency is greatly reduced. In contrast, SAG cyclone separator can decrease the PSD while maintaining a high particle collection efficiency. In addition, it is also found that the collection efficiency of particles decreases with the increase of the opening size of the secondary air inlet, but the SAG cyclone separator is less sensitive to this, making it more controllable in practical applications. To further assess the impact of cyclone modification on coating powder and film properties, the powder coatings with wide PSD and narrow PSD were prepared by original cyclone and SAG cyclone, respectively. It was found that reducing the span of the powder by modifying the cyclone can effectively improve the flowability (angle of repose (AOR), avalanche angle (AVA) and rotating bed expansion rate (RBER)) and film properties (distinctness of image (DOI) and surface flatness) of the particles. This study provides guidance for narrowing the PSD and improving the flowability and film properties of powder coatings.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 67-77"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195720","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

Bubbling phenomena during granular drainage from an inclined closed-top quasi-two-dimensional conduit 倾斜闭顶准二维管道颗粒排水过程中的鼓泡现象

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-22 DOI: 10.1016/j.partic.2025.05.005

Ritwik Maiti , Gargi Das , Prasanta Kumar Das

{"title":"Bubbling phenomena during granular drainage from an inclined closed-top quasi-two-dimensional conduit","authors":"Ritwik Maiti , Gargi Das , Prasanta Kumar Das","doi":"10.1016/j.partic.2025.05.005","DOIUrl":"10.1016/j.partic.2025.05.005","url":null,"abstract":"<div><div>The study investigates gravity-driven granular drainage from a closed-top quasi-two-dimensional rectangular conduit. Experiments over a wide range of conduit inclination with respect to the horizontal (<em>θ</em>) reveal drainage to occur by “avalanche flow”. Beyond a conduit tilt (<em>θ</em> > <em>θ</em><sub><em>b</em></sub>), avalanching is accompanied by bubbling of the interstitial air, which hastens the rate of drainage. However, on further increase in conduit tilt towards the vertical (<em>θ</em> > <em>θ</em><sub><em>m</em></sub>), the rate of drainage slows down as avalanche flow ceases while bubbling continues. Flow visualization experiments followed by image analysis, spatio-temporal plots, and Digital Particle Image velocimetry (DPIV) measurements provide a detailed qualitative description and quantitative measurements in the two drainage regimes, viz, avalanching with bubbling and drainage after termination of avalanche flow. Based on experimental observations, phenomenological models are proposed for the prediction of critical conduit inclination for the inception of bubbling (<em>θ</em><sub><em>b</em></sub>), and termination of avalanche flow (<em>θ</em><sub><em>m</em></sub>), as well as the bubble rise velocity in the two drainage regimes, i.e. for <em>θ</em><sub><em>b</em></sub>≤ <em>θ</em> ≤<em>θ</em><sub><em>m</em></sub> and <em>θ</em><sub><em>m</em></sub>≤ <em>θ</em> ≤ 90°.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 29-40"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170517","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

Competitive effects between heterogeneous and homogeneous nucleation during particle condensation growth process 颗粒凝聚生长过程中非均相成核与非均相成核的竞争效应

IF 4.1 2区材料科学

Particuology Pub Date : 2025-05-22 DOI: 10.1016/j.partic.2025.05.011

Zhengda Yang , Han Wei , Hao Zheng , Fayang Hu , Ye Jiang , Lingyu Shao

{"title":"Competitive effects between heterogeneous and homogeneous nucleation during particle condensation growth process","authors":"Zhengda Yang , Han Wei , Hao Zheng , Fayang Hu , Ye Jiang , Lingyu Shao","doi":"10.1016/j.partic.2025.05.011","DOIUrl":"10.1016/j.partic.2025.05.011","url":null,"abstract":"<div><div>The principal method for improving the removal efficiency of fine particles emitted from coal-fired power plants involves the application of water vapor phase change pretreatment technology. This study utilizes molecular dynamic (MD) simulation to examine the heterogeneous nucleation process between fine particles and H<sub>2</sub>O under conditions of multi-gas composition. Results showed that the heterogeneous nucleation and the homogeneous nucleation process of H<sub>2</sub>O occur concurrently, with both processes engaged in a competitive relationship. The nucleation process of H<sub>2</sub>O on particles is characterized by the formation of specific sites. In these regions, H<sub>2</sub>O interacts strongly with the O atoms on the particle surface through hydrogen bonding, leading to preferential condensation in the vicinity of these sites. The influence of temperature on particle growth primarily involves interaction and self-diffusion processes of H<sub>2</sub>O. As the temperature decreases, the size of particles initially increases and then decreases, reaching a maximum at 323 K. In contrast to the effects of temperature change, the influence of H<sub>2</sub>O content on fine particulate growth is primarily characterized by the competition between homogeneous and heterogeneous nucleation of H<sub>2</sub>O molecules. These findings, including the nucleation characteristics of fine particles and the influence mechanism of gas temperature and humidity, strengthen the theoretical system of water vapor phase change technology to promote the removal of fine particles from coal-fired flue gas, and provide theoretical support for subsequent process optimization.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"103 ","pages":"Pages 78-87"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195579","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