Powder Technology最新文献_第5页

Effect of carboxymethyl cellulose on silicon dispersion and the performance of graphite/Si-based electrodes for lithium-ion batteries

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-16 DOI: 10.1016/j.powtec.2024.120452

Kyeong Jin Kim, Kyung Hyun Ahn

{"title":"Effect of carboxymethyl cellulose on silicon dispersion and the performance of graphite/Si-based electrodes for lithium-ion batteries","authors":"Kyeong Jin Kim, Kyung Hyun Ahn","doi":"10.1016/j.powtec.2024.120452","DOIUrl":"10.1016/j.powtec.2024.120452","url":null,"abstract":"<div><div>This study investigates the effects of the molecular weight and degree of substitution (DS) of carboxymethyl cellulose (CMC) on the dispersion and mechanical properties of graphite/Si-based electrodes. By leveraging the interaction between silicon and CMC, which varies with the molecular weight and DS of CMC, the dispersion of silicon within the electrodes is effectively controlled. As the molecular weight of CMC increases, the longer chain length of CMC adsorbed on silicon leads to higher bridging efficiency, resulting in more pronounced bridging flocculation of silicon particles. A critical molecular weight exists at which silicon particles begin to agglomerate; however, increasing the DS of CMC from 0.7 to 0.9 reduces the hydrophobic interaction between CMC molecules, raising the critical molecular weight from approximately 190 kDa to 516 kDa. A trade-off exists between silicon dispersion and the mechanical properties of the electrodes, depending on the molecular weight of CMC. While lower molecular weight CMC at the same DS is beneficial for ensuring silicon dispersion, it also reduces the adhesion strength of the electrodes. However, increasing the DS from 0.7 to 0.9 allows the molecular weight of the binder to be increased up to 516 kDa without causing silicon agglomeration, thereby improving the adhesion strength and significantly enhancing the stability of the electrodes. This study presents a practical strategy to improve the stability of graphite/Si-based electrodes by uniformly dispersing high-content (∼ 15 <span><math><mi>wt</mi><mo>%</mo></math></span>) silicon particles through Si-CMC interactions, determined by the molecular weight and DS of CMC. We believe that our study will contribute to enhancing the energy density and stability of next-generation silicon-based batteries.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"452 ","pages":"Article 120452"},"PeriodicalIF":4.5,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phytochemical properties and antioxidative activities of ginseng superfine powders prepared by wet grinding method with high-pressure homogenization 高压均质湿磨法制备的人参超细粉的植物化学特性和抗氧化活性

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-15 DOI: 10.1016/j.powtec.2024.120448

Mei Sun , Keke Li , Xiaoxi Li , Jiwen Li , Lei Men , Mingming Lu , Xiaojie Gong , Zhongyu Li

{"title":"Phytochemical properties and antioxidative activities of ginseng superfine powders prepared by wet grinding method with high-pressure homogenization","authors":"Mei Sun , Keke Li , Xiaoxi Li , Jiwen Li , Lei Men , Mingming Lu , Xiaojie Gong , Zhongyu Li","doi":"10.1016/j.powtec.2024.120448","DOIUrl":"10.1016/j.powtec.2024.120448","url":null,"abstract":"<div><div>Ginseng is widely used in agricultural products, dietary health supplements, and pharmaceutical preparations, which has significant market potential. It is of great significance to develop a more efficient and environmentally friendly production process of ginseng powder. However, ginseng is difficult to be milled to an ideal state by dry grinding method because of its higher fiber content. In the meantime, ginseng has high viscosity when suspended in a liquid, which can pose challenges during wet grinding processes. In order to develop a production process for ginseng powder with excellent physicochemical properties, three kinds of powders were obtained by both dry grinding method (ball mill) and wet grinding method (colloid mill&high-pressure homogenizer) in this study. The powder properties, structural properties, saponin contents,and antioxidant activity of different ginseng powders were also investigated. The results showed that wet grinding technology using a high-pressure homogenization process could significantly improve the powder properties，including the particle size, specific surface area, span value, water holding capacity, and appearance. Moreover, both the saponin contents and the antioxidant activity of the powder had been significantly enhanced. The findings indicated that high-pressure homogenization process was a promising technique for producing plant powders rich in bioactive compounds, which could enhance their bioactivity. The method was argued to be a significant alternative technology for production of ginseng ultrafine powders. Furthermore, it offered theoretical and technical support for the application of the high-pressure homogenization process in the preparation of ultrafine powders with reduced particle sizes from high-fiber plants.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120448"},"PeriodicalIF":4.5,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced slurry transport efficiency and energy reduction through swirl-inducing pipes 通过漩涡诱导管道提高泥浆输送效率并降低能耗

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-14 DOI: 10.1016/j.powtec.2024.120441

Ram Krishna Rathore , Niranjan Kumar , Pankaj Kumar Gupta

{"title":"Enhanced slurry transport efficiency and energy reduction through swirl-inducing pipes","authors":"Ram Krishna Rathore , Niranjan Kumar , Pankaj Kumar Gupta","doi":"10.1016/j.powtec.2024.120441","DOIUrl":"10.1016/j.powtec.2024.120441","url":null,"abstract":"<div><div>Tailings are the waste material left after “mineral values” have been extracted from the ore. Proper tailings disposal should be economical and environmentally safe. This study reports significant increase in energy efficiency during hydro-transport of zinc tailings by integrating a swirl-motion-inducing pipe segment into the conventional pipeline. The computational model was rigorously tested against available experimental data on standard pipes. The zinc tailings slurry used has a wide particle size distribution, represented by multiple size classes, each having representative size and concentration. The study found that adding swirl-inducing pipe section to the conventional pipeline decreased specific energy consumption (SEC) by up to 35 % for transporting settling slurry, especially at moderate to high solids concentrations. Among the various configurations tested, the pipeline with a 10-lobed swirl-inducing segment achieved the lowest SEC across the operating conditions considered. These findings highlight the potential of swirl-inducing segments in improving energy efficiency for slurry transport.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"450 ","pages":"Article 120441"},"PeriodicalIF":4.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methane dry reforming in a microwave heating-assisted dense fluidized bed 在微波加热辅助密集流化床中进行甲烷干重整

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-13 DOI: 10.1016/j.powtec.2024.120444

Mojtaba Mokhtari, Jaber Shabanian, Jamal Chaouki

引用次数: 0

Effect of mechanical milling time on powder characteristic, microstructure, and mechanical properties of AA2024/B4C/GNPs hybrid nanocomposites 机械研磨时间对 AA2024/B4C/GNPs 混合纳米复合材料粉末特性、微观结构和力学性能的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-13 DOI: 10.1016/j.powtec.2024.120439

Müslim Çelebi, Aykut Çanakçı, Serdar Özkaya

{"title":"Effect of mechanical milling time on powder characteristic, microstructure, and mechanical properties of AA2024/B4C/GNPs hybrid nanocomposites","authors":"Müslim Çelebi, Aykut Çanakçı, Serdar Özkaya","doi":"10.1016/j.powtec.2024.120439","DOIUrl":"10.1016/j.powtec.2024.120439","url":null,"abstract":"<div><div>In this study, hybrid nanocomposites consisting of an AA2024 matrix reinforced with 1 wt% B<sub>4</sub>C nanoparticles and 1 wt% GNPs were produced using a powder metallurgy method assisted by mechanical milling. This study aimed to systematically investigate the effect of grinding time on powder characteristics (particle size, microhardness, and morphology) as well as microstructure, densification, and mechanical performance to optimize processing conditions for superior material properties. Microstructural characterization of powders and bulk samples were carried out using a SEM device equipped with EDS. The results indicate that with increasing milling time, the particle size significantly decreased, while the particle hardness increased substantially. Additionally, the sample milled for 8 h achieved the highest relative density among the hybrid nanocomposites, reaching a value of 95.3 %. Mechanical tests revealed that after 8 h of milling, the hardness and tensile strength reached peak values of 164 HB and 314 MPa, corresponding to increases of 56 % in hardness and 43 % in tensile strength compared to the unreinforced alloy. The analysis results confirm that the optimal properties were obtained after 8 h under all conditions.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120439"},"PeriodicalIF":4.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEM simulation of an impact crusher using the fast-cutting breakage model 利用快速切割破碎模型对反击式破碎机进行 DEM 仿真

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-13 DOI: 10.1016/j.powtec.2024.120442

Fulei Chen , Hui Yuan , Zihan Liu , Lianyong Zhou , Changsheng Cao , Gen Zhong , Dongsheng Zhang , Yongzhi Zhao

{"title":"DEM simulation of an impact crusher using the fast-cutting breakage model","authors":"Fulei Chen , Hui Yuan , Zihan Liu , Lianyong Zhou , Changsheng Cao , Gen Zhong , Dongsheng Zhang , Yongzhi Zhao","doi":"10.1016/j.powtec.2024.120442","DOIUrl":"10.1016/j.powtec.2024.120442","url":null,"abstract":"<div><div>The impact crusher that exploits impact rather than pressure to break down materials has been widely used in the mineral industry. To further improve its performance in material crushing, numerical simulation capable of providing a deeper insight into the complicated dynamics of feed materials than experimental study has emerged as a promising tool. However, the field of the accurate prediction of product quality and explicit simulation of breakage events inside an industrial-scale crusher remains underexplored on account of the absence of a robust breakage model and heavy computational cost. In this study, a numerical investigation of an industrial-scale crusher using the fast-cutting breakage model is conducted within the DEM (Discrete Element Method) framework. The accuracy of the breakage simulation is quantitatively validated by comparing the predicted results with the measurements from actual production. Furthermore, the influence of operating conditions including the rotation speed of the rotor and the feeding rate on the interested parameters, i.e., the power consumption of the equipment, the size distribution of the products, and the impact-induced wear is investigated comprehensively. The results illustrate that (i) the size of the product increases with the rotor speed until a critical value, after which a further increase in rotor speed will exert no significant influence on the size distribution; (ii) The feeding rate is not a critical operating condition that largely determines the fineness of the product and the efficiency of the equipment almost remain stable under a certain range of feeding rates; (iii) The wear of the devices concentrates on the rotor and the impact plates, and the distribution of the wear exhibits different characteristics in different parts, caused by the complex collision between the particles and the devices.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"450 ","pages":"Article 120442"},"PeriodicalIF":4.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A quantitative, image-based analysis of the spreading performance of PolyArylEtherKetone polymer powders during Powder Bed Fusion Additive Manufacture 基于图像的聚芳基醚酮聚合物粉末在粉末床熔融添加剂制造过程中的铺展性能定量分析

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-13 DOI: 10.1016/j.powtec.2024.120445

Richard Davies, Konstantinos Agathos, Ken E. Evans, Oana Ghita

{"title":"A quantitative, image-based analysis of the spreading performance of PolyArylEtherKetone polymer powders during Powder Bed Fusion Additive Manufacture","authors":"Richard Davies, Konstantinos Agathos, Ken E. Evans, Oana Ghita","doi":"10.1016/j.powtec.2024.120445","DOIUrl":"10.1016/j.powtec.2024.120445","url":null,"abstract":"<div><div>Powder spreadability in the powder bed fusion process is normally visually assessed by the machine operator through repeat trials at room temperature or elevated temperatures. Some studies used powder rheology results as an indicator of the powder spreadability. This study presents a novel method of image-based analysis for the assessment of polymer spreading quality for powder bed fusion and demonstrates that the subjective assessment of the machine operator can be replaced by quantitative and measurable data. Twenty-four developmental grade PolyArylEtherKetone powders were tested. Images of the powder bed surface were analysed in MATLAB and the relationships with the powder rheology established through statistical analysis. The two methods for calculating surface deviations from variations in the greyscale images showed to be sensitive to the recoater travel and presented a strong correlation with the Normalised Aeration Sensitivity (NAS), a powder rheology parameter identified in a previous study as the most significant parameter able to categorise powder flow and spreadability based on a yes/no response.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120445"},"PeriodicalIF":4.5,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterisation of a continuous blender: Impact of physical properties on mass holdup behaviour 连续式搅拌器的特性：物理特性对质量保持行为的影响

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-12 DOI: 10.1016/j.powtec.2024.120440

Hikaru Graeme Jolliffe , Maria A. Velazco-Roa , Luis Martin de Juan , Martin Prostredny , Carlota Mendez Torrecillas , Gavin Reynolds , Deborah McElhone , John Robertson

{"title":"Characterisation of a continuous blender: Impact of physical properties on mass holdup behaviour","authors":"Hikaru Graeme Jolliffe , Maria A. Velazco-Roa , Luis Martin de Juan , Martin Prostredny , Carlota Mendez Torrecillas , Gavin Reynolds , Deborah McElhone , John Robertson","doi":"10.1016/j.powtec.2024.120440","DOIUrl":"10.1016/j.powtec.2024.120440","url":null,"abstract":"<div><div>Continuous blenders are a key unit operation in Continuous Direct Compaction, a route to solid oral dosage forms that is receiving significant interest. Mass holdup in these blenders is a crucial variable; understanding how it is influenced by material properties, equipment configuration and process settings is key. The present work evaluated a Gericke GCM-450 blender for range of outlet weir aperture geometries (angled or horizontal), material properties (pure components and blends) and process settings (throughput and impeller speed). Results show opposing mass holdup behaviour depending on weir choice, material density and flowability, likely linked to the propensity of the material to form an inclined powder surface that matches – or does not – the chosen weir geometry. The present work underscores the need for fundamental process phenomena understanding, especially when insight is sought for how blender performance varies across multiple dimensions (throughput, impeller speed, material properties) and discrete equipment choices (weir geometry).</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"449 ","pages":"Article 120440"},"PeriodicalIF":4.5,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mass discharge rate of granular flow in eccentric silos with variable side wall friction 具有可变侧壁摩擦力的偏心料仓中颗粒流的质量排出率

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-12 DOI: 10.1016/j.powtec.2024.120438

Ge Sun , Quan Chen , Ran Li , Tongtong Mu , Hui Yang

引用次数: 0

3D shape reconstruction and generation of natural pozzolan particles 三维形状重建和生成天然沸石颗粒

IF 4.5 2区工程技术

Powder Technology Pub Date : 2024-11-10 DOI: 10.1016/j.powtec.2024.120443

Bo Peng, Prabu Thannasi, Kemal Celik

{"title":"3D shape reconstruction and generation of natural pozzolan particles","authors":"Bo Peng, Prabu Thannasi, Kemal Celik","doi":"10.1016/j.powtec.2024.120443","DOIUrl":"10.1016/j.powtec.2024.120443","url":null,"abstract":"<div><div>Natural pozzolans are widely used in the construction industry due to their beneficial properties, including enhanced durability, increased long-term concrete strength, and contributions to sustainability by reducing Portland cement usage and carbon emissions. Additionally, they play a role in producing lunar regolith simulants due to their geochemical similarity to lunar regolith. While their physical and chemical characteristics are well-studied, the impact of particle morphology is significant. Understanding pozzolan particle shape and surface characteristics can optimize their reactivity, workability, and effectiveness in construction materials. Despite its importance, particle morphology is not widely assessed due to the fine scale of the particles. This paper presents a systematic approach to reconstruct and generate realistic pozzolan particles, offering valuable insights into their morphology and enhancing practical applications. Our proposed method, with its potential to improve numerical studies and serve as a foundation for pozzolan-related applications, holds promise for future construction materials and space applications.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120443"},"PeriodicalIF":4.5,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0