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Experimental validation and numerical analysis of temporary plugging ball transport dynamics in horizontal wellbore
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-03-01 DOI: 10.1016/j.partic.2025.02.005
Yang Li , Di Wang , Jiahao Wang , Jingcheng Li , Luoyun Liu
{"title":"Experimental validation and numerical analysis of temporary plugging ball transport dynamics in horizontal wellbore","authors":"Yang Li ,&nbsp;Di Wang ,&nbsp;Jiahao Wang ,&nbsp;Jingcheng Li ,&nbsp;Luoyun Liu","doi":"10.1016/j.partic.2025.02.005","DOIUrl":"10.1016/j.partic.2025.02.005","url":null,"abstract":"<div><div>This study explores the transport dynamics of temporary plugging balls in multi-cluster horizontal wellbores through a three-dimensional Computational Fluid Dynamics (CFD) model based on field dimensions. An experimental setup mimicking the transport of these balls was utilized to validate the model, revealing a maximum discrepancy of less than 22.2% in ball allocation proportions under identical conditions. This validation substantiates the model's precision in predicting transport dynamics across various operational scenarios. Key parameters, including pump rate, fluid viscosity, perforation discharge capacity, ball diameter, ball density, and the number of balls, were examined using the validated model. Findings indicate that pump rate, ball density, and perforation discharge capacity markedly influence ball distribution, followed by fluid viscosity. The number of balls has a lesser effect. Elevated pump rates augment inertial forces, prompting balls to migrate towards the toe-side of the wellbore. Moderate fluid viscosities enhance distribution uniformity, whereas extreme viscosities do not. Perforation clusters with higher discharge capacities attract more balls, thereby improving plugging efficiency. Lower ball density and smaller diameter yield more uniform distribution, while higher values lead to ball accumulation at the toe-end. This study offers valuable insights for optimizing parameters in temporary plugging fracturing technology, thereby improving the efficiency and effectiveness of hydraulic fracturing treatments.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 271-288"},"PeriodicalIF":4.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535204","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
Constructing metal-phenolic network (MPN) microspheres as efficient adsorbent for pollutants removal
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-03-01 DOI: 10.1016/j.partic.2025.02.001
Qiang Liu , Lin Han , Tiantian Feng , Ying Li , Tao Jiang , Jian Li
{"title":"Constructing metal-phenolic network (MPN) microspheres as efficient adsorbent for pollutants removal","authors":"Qiang Liu ,&nbsp;Lin Han ,&nbsp;Tiantian Feng ,&nbsp;Ying Li ,&nbsp;Tao Jiang ,&nbsp;Jian Li","doi":"10.1016/j.partic.2025.02.001","DOIUrl":"10.1016/j.partic.2025.02.001","url":null,"abstract":"<div><div>Metal-phenolic networks (MPNs) are a versatile class of self-assembled systems that are generating interest for applications in catalysis, bioimaging, and drug delivery. In contrast to traditional MPNs coating, in this research, we fabricated novel MPNs microspheres through a facile process in the aqueous solution. The MPNs microspheres are characterized by SEM, TEM, and XPS. The as-prepared microspheres were utilized in the removal of tetracycline (TC), methylene blue (MB), and rhodamine B (RhB). It exhibits high capacity (1331 mg/g) for the adsorption of MB, and a rapid reaction rate (186.9 mg/g/min) for the adsorption of TC.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 241-248"},"PeriodicalIF":4.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508694","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
Computational study of the effect of friction coefficients and particle shape on the repose angle and porosity of sinter piles
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-03-01 DOI: 10.1016/j.partic.2025.01.020
Meng Li , Yaowei Yu , Henrik Saxén
{"title":"Computational study of the effect of friction coefficients and particle shape on the repose angle and porosity of sinter piles","authors":"Meng Li ,&nbsp;Yaowei Yu ,&nbsp;Henrik Saxén","doi":"10.1016/j.partic.2025.01.020","DOIUrl":"10.1016/j.partic.2025.01.020","url":null,"abstract":"<div><div>Shape has an undeniable impact on particle behaviour, and the shapes of naturally occurring granular matter are typically irregular. Computational studies of irregularly shaped particles are challenging but necessary to gain a better understanding of the flow of particulate matter. This study focuses on the behaviour of irregular sinter particles and applies the discrete element method to examine the effects of static and rolling friction coefficients and particle shape on the angle of repose and porosity of sinter piles. A three-dimensional model of an irregular sinter particle reconstructed by close-range photogrammetry served as the template for generating multi-sphere particles with varying numbers of sub-spheres (1, 3, 7, 22, and 135) and sphericity ranging from 1 to 0.69. Simulations of particle piles were conducted for a range of values of the coefficients of static and rolling friction. The results indicate that the angle of repose increases with static friction and also increases with rolling friction coefficient when it is lower than the static coefficient. The angle of repose shows clear dependence on particle shape, particularly for lower rolling friction coefficients. The friction coefficients for particles of five different shapes were individually determined through bulk calibration, and irregularly shaped particles in DEM were found to require lower friction coefficients. Porosity was marginally affected by the static and rolling friction coefficients for spherical particles, while non-spherical particles showed porosity increasing with the rolling friction coefficient. The relationship between particle sphericity and porosity was nonlinear: as sphericity decreases from 1.00 to 0.69, the porosity first decreases to a minimum and then increases. The findings confirmed that both friction and particle shape have a significant influence on the structure of sinter piles, with implications for material handling and processing in industrial applications.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 231-240"},"PeriodicalIF":4.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cutting-edge recycling solution at pilot-scale for end-of-life LiFePO4 batteries and recovery of graphite using centrifuge filtration
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-28 DOI: 10.1016/j.partic.2025.02.012
Abhilash Mishra , Rina Sahu
{"title":"Cutting-edge recycling solution at pilot-scale for end-of-life LiFePO4 batteries and recovery of graphite using centrifuge filtration","authors":"Abhilash Mishra ,&nbsp;Rina Sahu","doi":"10.1016/j.partic.2025.02.012","DOIUrl":"10.1016/j.partic.2025.02.012","url":null,"abstract":"<div><div>The rapid growth of the electric vehicle market has led to an unprecedented demand for lithium iron phosphate (LiFePO<sub>4</sub>) batteries, renowned for their exceptional safety, performance, and environmental benefits. However, the escalating volume of spent LiFePO<sub>4</sub> batteries poses significant environmental and resource challenges. To address these concerns, this study develops an innovative industrial-scale recycling process utilizing centrifuge filtration to recover graphite assisted hydrometallurgy for efficient recovery of lithium, iron and phosphorus from LiFePO<sub>4</sub> black mass powder (cathode powder + graphite). Hydrometallurgical acid leaching of LiFePO<sub>4</sub> black mass powder is optimized under following conditions; 1.2 M sulfuric acid, 5% hydrogen peroxide, 100 g/L pulp density at 60 °C for 180 min reaction time in a 500 L reactor at pilot plant scale, achieving 99.7% lithium extraction efficiency and 93.5% fixed carbon in graphite residue. Metal composition and crystal structure were all revealed by extensive characterization utilizing atomic absorption spectroscopy (AAS), scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), x-ray diffraction (XRD) and particle size analyzer. This research provides a ground-breaking recycling pathway for LiFePO<sub>4</sub> batteries, at pilot scale, promoting sustainable resource management, mitigating environmental risks, and supporting the circular economy. By leveraging centrifuge filtration-assisted hydrometallurgy, the recycling industry can efficiently recover valuable materials, reduce waste, and contribute to a more sustainable future.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 11-22"},"PeriodicalIF":4.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579096","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
Clarification of network structure of lithium-ion battery slurry under effects of composite conductive agent amount and carbon black to graphene mass ratio
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-28 DOI: 10.1016/j.partic.2025.02.011
Zhilong Wang, Jianhang Lu, Jiatan Zhang, Feixiang Li, Xinhao Yu, Bo Sun, Yahui Cui, Tong Zhao
{"title":"Clarification of network structure of lithium-ion battery slurry under effects of composite conductive agent amount and carbon black to graphene mass ratio","authors":"Zhilong Wang,&nbsp;Jianhang Lu,&nbsp;Jiatan Zhang,&nbsp;Feixiang Li,&nbsp;Xinhao Yu,&nbsp;Bo Sun,&nbsp;Yahui Cui,&nbsp;Tong Zhao","doi":"10.1016/j.partic.2025.02.011","DOIUrl":"10.1016/j.partic.2025.02.011","url":null,"abstract":"<div><div>This paper clarified the network structure of the lithium-ion battery (LIB) slurry under effects of composite conductive agent amount and carbon black (CB) to graphene (Gr) mass ratio (<em>m’</em><sub>CB</sub>:<em>m’</em><sub>Gr</sub>). Four different amounts of composite conductive agent which are <em>φ</em><sub>com1</sub> = 0.25%, <em>φ</em><sub>com2</sub> = 0.5%, <em>φ</em><sub>com3</sub> = 0.75% and <em>φ</em><sub>com4</sub> = 1% are selected as the conductive materials for LIB slurries. Meanwhile, to discriminate the individual impacts of CB and Gr, two distinct mass ratios of CB to Gr, namely, <em>m’</em><sub>CB</sub>: <em>m’</em><sub>Gr</sub> = 1:2 and <em>m’</em><sub>CB</sub>: <em>m’</em><sub>Gr</sub> = 2:1, are additionally chosen. Moreover, the influence of single conductive additive agent CB or Gr with the same amount as composite conductive agent on the network structure of the LIB slurry is also investigated. Furthermore, Electrochemical Impedance Spectroscopy (EIS), Scanning Electron Microscopy (SEM) and Raman experiments are performed to obtain the electrochemical, morphological and Raman characterizations of LIB slurry, respectively. After analyzing the experimental results, the main conclusion shows that the synergistic interaction between CB and Gr ensures a high-level conductive efficiency because of minimizing the amount of the conductive agent and increasing the amount of LiCoO<sub>2</sub> particles to the utmost degree, which has the potential to substantially elevating the energy density of LIB.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 47-59"},"PeriodicalIF":4.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579041","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
Particle dynamics in linear and non-linear magnetic fields: An IBM-DEM coupled analysis
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-27 DOI: 10.1016/j.partic.2025.01.016
Asif Afzal, Bernhard Peters
{"title":"Particle dynamics in linear and non-linear magnetic fields: An IBM-DEM coupled analysis","authors":"Asif Afzal,&nbsp;Bernhard Peters","doi":"10.1016/j.partic.2025.01.016","DOIUrl":"10.1016/j.partic.2025.01.016","url":null,"abstract":"<div><div>A two way coupled Immersed boundary method (IBM) and Discrete element method (DEM) is performed in this work to access the behavior of particles in Magnetorheological fluids (MRFs) under the influence of magnetic field. Particle dynamics under linear and non-linear magnetic field is analyzed in different conditions. The results are compared with analytical solution for the case of one-dimensional particle motion. Particle chain formation for mono-dispersion and poly-dispersion (having three different sizes) is simulated when particles are placed in lower (0.0375T) and higher (0.3T) density magnetic fields. Particle placed in a stationary fluid column in non-linear magnetic field, along with gravitational force acting on the particle, is also simulated at the end. A modified version of Foam extend (for IBM), is used to compute the hydrodynamic stress which is transferred to the DEM part. The particle position and velocity are then numerically accessed using in-house developed XDEM code (Extended DEM). The new position and velocity of the particles are transferred back to IBM, and this keeps repeating till the final time step. A module is added to the calculate the effect of magnetic force on the particles in XDEM which is then validated with a benchmark case. For particle under linear magnetic field, the chain formation time for 5 μm size particle diameter and mixture of 5 μm, 4 μm, and 3 μm particle diameters with 10%, 20%, and 30% volume concentration (vc.%) is discussed. It is found that for 0.0375T of field density, the particle chain formation for mono-dispersion with 10 vc.% requires more time while for 30 vc.% it is very less relatively. For poly-dispersion, the particle chain formation depends on the random position of particles and the vc.%. For particle suspended in fluid under non-linear magnetic field, the influence of particle dynamics is sever which can overcome the gravitational force effect.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 194-209"},"PeriodicalIF":4.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645096","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
The effects of chemical groups of liquids on the dynamic pore wetting and particle-bubble attachment of porous carbon particles
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-26 DOI: 10.1016/j.partic.2025.02.009
Chengping Deng , Teng He , Liuyang Dong , Yuqiang Mao , Peilun Shen , Dianwen Liu
{"title":"The effects of chemical groups of liquids on the dynamic pore wetting and particle-bubble attachment of porous carbon particles","authors":"Chengping Deng ,&nbsp;Teng He ,&nbsp;Liuyang Dong ,&nbsp;Yuqiang Mao ,&nbsp;Peilun Shen ,&nbsp;Dianwen Liu","doi":"10.1016/j.partic.2025.02.009","DOIUrl":"10.1016/j.partic.2025.02.009","url":null,"abstract":"<div><div>Dynamic pore wetting plays a major role in the flotation of porous mineral particles. However, the role of chemical properties of the liquids in dynamic pore wetting is not systematically studied. This paper studied the dynamic pore wetting process of the porous carbon particles by 10 g/L NaOL solution and n-hexadecane at different wetting times using a <sup>1</sup>H low-field nuclear magnetic resonance (LF-NMR). The mechanism of chemical groups of liquids affecting the pore wetting percentage and floatability of porous particles was revealed by FTIR, zeta potential, contact angle, and particle-bubble attachment tests. The results displayed that the pore wetting percentage of the particles wetted by NaOL solution was larger than that by n-hexadecane except for mesopores. Compared with the raw sample, the surface potential of the particles wetted by n-hexadecane was decreased and that by NaOL solution were negative. The NaOL, as an amphiphilic reagent contained some hydrophobic and hydrophilic functional groups, which was different from the n-hexadecane. The NaOL molecule could be easily adsorbed into the particles by electrostatic interaction compared with n-hexadecane, achieving a better surface hydrophobicity of the particles. Thus, the floatability of porous carbon particles wetted by NaOL solution was larger than that by n-hexadecane.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 1-10"},"PeriodicalIF":4.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550246","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
Evaluation of magnetic teawaste-based biochar particles for removal of cadmium from aqueous solutions
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-25 DOI: 10.1016/j.partic.2025.02.007
Matthew Ervine, Chirangano Mangwandi
{"title":"Evaluation of magnetic teawaste-based biochar particles for removal of cadmium from aqueous solutions","authors":"Matthew Ervine,&nbsp;Chirangano Mangwandi","doi":"10.1016/j.partic.2025.02.007","DOIUrl":"10.1016/j.partic.2025.02.007","url":null,"abstract":"<div><div>The Response Surface Methodology (RSM), specifically the face-centred central design, was employed to determine the optimal pyrolysis conditions for producing magnetic biochar from teawaste with the highest capacity for removing cadmium (Cd<sup>2+</sup>) ions. Several process conditions were investigated, including pyrolysis temperature (200, 350, 500 °C), duration of pyrolysis (2, 3, 4 h), and the concentration of iron chloride added (0.02, 0.05, 0.09 g/g). The sample obtained through pyrolysis at a temperature of 200 °C for a duration of 4 h with an iron chloride concentration of 0.09 g/g exhibited the highest removal efficiency of 80% for Cd<sup>2+</sup>. Results show that the magnetic teawaste biochar (MTWBC) possessed a maximum Langmuir capacity of 7.23 mmol/g at 298 K. The experimental data obtained for the three temperatures studied were best described by the Freundlich isotherm model. As for the kinetics of the experiment, the Modified Freundlich Kinetic model provided the most accurate fit. The Fourier Transform Infrared (FT-IR) analysis conducted on the MTWBC samples, both before and after adsorption, demonstrated that the removal of Cd<sup>2+</sup> by MTWBC involved chemisorption, which engaged specific functional groups present on the surface of MTWBC. Overall, these results highlight the promising potential of MTWBC as an economically viable bio-adsorbent for the removal of cadmium from contaminated water sources.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 92-105"},"PeriodicalIF":4.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure, free surface energy parameters, and direct compaction properties of composite particles: Characterization and correlation analysis
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-25 DOI: 10.1016/j.partic.2025.02.008
Zhe Li , Shuangcui Fang , Zhijian Zhong , Abid Naeem , Lingyu Yang , Zhengji Jin , Yongmei Guan , Lihua Chen , Yanni Wu , Xu Zhang , Mengting Su , Weifeng Zhu , Liangshan Ming
{"title":"Structure, free surface energy parameters, and direct compaction properties of composite particles: Characterization and correlation analysis","authors":"Zhe Li ,&nbsp;Shuangcui Fang ,&nbsp;Zhijian Zhong ,&nbsp;Abid Naeem ,&nbsp;Lingyu Yang ,&nbsp;Zhengji Jin ,&nbsp;Yongmei Guan ,&nbsp;Lihua Chen ,&nbsp;Yanni Wu ,&nbsp;Xu Zhang ,&nbsp;Mengting Su ,&nbsp;Weifeng Zhu ,&nbsp;Liangshan Ming","doi":"10.1016/j.partic.2025.02.008","DOIUrl":"10.1016/j.partic.2025.02.008","url":null,"abstract":"<div><div>This study aimed to compare and analyze the effects of different modifiers on the structure, free surface energy parameters, and direct compaction properties of composite particles (CPs) prepared by co-spray drying and to explore the correlation among structure, free surface energy parameters, and direct compaction properties of CPs. CPs with <em>Puerariae lobatae radix</em> were prepared by adding different modifiers. The structure, free surface energy parameters, and direct compaction properties of CPs were characterized. Furthermore, Pearson correlation analysis and artificial neural network methods were used to evaluate the correlation among structure, free surface energy parameters, and direct compaction properties of CPs. The results showed that different modifiers exhibited variegated effects on the structure, free surface energy parameters, and direct compaction properties of CPs. Pearson correlation analysis showed that the particle size distribution, uniformity, and brightness were positively correlated with polar components and polarity index, with statistical significance (P &lt; 0.01). The polar components and polarity index were positively correlated with flowability and disintegration time, and negatively correlated with compactibility, with statistical significance (P &lt; 0.01). Overall, these findings contribute to better establishing a theoretical model among structure, free surface energy parameters, and direct compaction properties of CPs and provide a theoretical basis for predicting material properties.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 80-91"},"PeriodicalIF":4.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593466","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
Drawdown and suspension of corn straw in the non-Newtonian fluid in stirred tank
IF 4.1 2区 材料科学
Particuology Pub Date : 2025-02-22 DOI: 10.1016/j.partic.2025.02.006
Chao Song , Xuejun Hu , Shuang Yang , Jinxiao Xu , Chang Chen , Guangqing Liu
{"title":"Drawdown and suspension of corn straw in the non-Newtonian fluid in stirred tank","authors":"Chao Song ,&nbsp;Xuejun Hu ,&nbsp;Shuang Yang ,&nbsp;Jinxiao Xu ,&nbsp;Chang Chen ,&nbsp;Guangqing Liu","doi":"10.1016/j.partic.2025.02.006","DOIUrl":"10.1016/j.partic.2025.02.006","url":null,"abstract":"<div><div>Due to the low density and hydrophobicity, the corn straw (CS) particles tend to float on the liquid surface in the anaerobic digester, deteriorating the bioconversion efficiency and process stability. Although the mechanical mixing is widely used in digesters, the drawdown and suspension of CS in the non-Newtonian slurry have not been sufficiently studied. This paper investigated the effect of particle size, liquid viscosity, solid phase mass fraction, impeller type and off-bottom distance on the just-drawdown rotational speed (<em>N</em><sub>jd</sub>), complete drawdown rotational speed (<em>N</em><sub>cd</sub>) and cloud depth (<em>CD</em>) of dry and wet straw particles in the stirred tank. The results showed that the distribution of dry and wet straw in the stirred tank significantly differed due to differences in density and wettability. The models built by dimensional analysis and machine learning were suitable for accurate predictions of specific variables. Based on the model analysis, the <em>N</em><sub>jd</sub> of dry straw was mainly affected by the liquid viscosity, impeller type and off-bottom distance, as these factors determined the flow field of liquid phase for its drawdown. <em>N</em><sub>jd</sub> of wet straw was related to the liquid viscosity and <em>N</em><sub>cd</sub> was influenced by impeller off-bottom distance. The <em>CD</em> of dry and wet straw particles were both affected by rotational speed, impeller type, and liquid viscosity, which were related to the mean flow and turbulence intensity in the tank. The results provide valuable references for the design and operation of mixing configurations for low-density feedstocks in the anaerobic digester.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 173-183"},"PeriodicalIF":4.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629053","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
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