KONA Powder and Particle Journal最新文献_第8页

Recent Progress in Efficient Gas–Solid Cyclone Separators with a High Solids Loading for Large-scale Fluidized Beds 大型流化床高固载高效气固旋风分离器研究进展

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021001

C. Fushimi, Kentaro Yato, M. Sakai, T. Kawano, Teruyuki Kita

{"title":"Recent Progress in Efficient Gas–Solid Cyclone Separators with a High Solids Loading for Large-scale Fluidized Beds","authors":"C. Fushimi, Kentaro Yato, M. Sakai, T. Kawano, Teruyuki Kita","doi":"10.14356/kona.2021001","DOIUrl":"https://doi.org/10.14356/kona.2021001","url":null,"abstract":"Circulating fluidized beds (CFB)s are important technical equipment to treat gas–solid systems for fluid catalytic cracking, combustion, gasification, and high-temperature heat receiving because their mass and heat transfer rates are large. Cyclones are important devices to control the performance of CFBs and ensure their stable operation; heat-carrying and/or solid catalyst particles being circulated in a CFB should be efficiently separated from gas at a reduced pressure loss during separation. In commercial CFBs, a large amount of solids (> 1 kg-solid (m 3 -gas) –1 or > 1 kg-solid (kg-gas) –1 ) is circulated and should be treated. Thus, gas–solid cyclones with a high solids loading should be developed. A large number of reports have been published on gas–solid separators, including cyclones. In addition, computational fluid dynamics (CFD) technology has rapidly developed in the past decade. Based on these observations, in this review, we summarize the recent progress in experimental and CFD studies on gas– solid cyclones. The modified pressure drop model, scale-up methodology, and criteria for a single large cyclone vs. multiple cyclones are explained. Future research perspectives are also discussed.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"43 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76425588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 8

Static and Dynamic Stickiness Tests to Measure Particle Stickiness 用于测量颗粒粘性的静态和动态粘性测试

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021017

J. G. S. Erik, Fuweng Zhang, van Steijn Volkert, V.H.O Ruud, M. H. M. Gabrie

{"title":"Static and Dynamic Stickiness Tests to Measure Particle Stickiness","authors":"J. G. S. Erik, Fuweng Zhang, van Steijn Volkert, V.H.O Ruud, M. H. M. Gabrie","doi":"10.14356/kona.2021017","DOIUrl":"https://doi.org/10.14356/kona.2021017","url":null,"abstract":"Sticking of particles has a tremendous impact on powder-processing industries, especially for hygroscopic amorphous powders. A wide variety of experimental methods has been developed to measure at what combinations of temperature and moisture content material becomes sticky. This review describes, for each method, how so-called stickiness curves are determined. As particle velocity also plays a key role, we classify the methods into static and dynamic stickiness tests. Static stickiness tests have limited particle motion during the conditioning step prior to the measurement. Thus, the obtained information is particularly useful in predicting the long-term behavior of powder during storage or in packaging. Dynamic stickiness tests involve significant particle motion during conditioning and measurement. Stickiness curves strongly depend on particle velocity, and the obtained information is highly relevant to the design and operation of powder production and processing equipment. Virtually all methods determine the onset of stickiness using powder as a starting point. Given the many industrial processes like spray drying that start from a liquid that may become sticky upon drying, future effort should focus on developing test methods that determine the onset of stickiness using a liquid droplet as a starting point.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"6 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82563364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Coal Particle Devolatilization and Soot Formation in Pulverized Coal Combustion Fields 煤粉燃烧场中煤颗粒的脱挥发与煤烟的形成

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021003

Nozomu Hashimoto, J. Hayashi

{"title":"Coal Particle Devolatilization and Soot Formation in Pulverized Coal Combustion Fields","authors":"Nozomu Hashimoto, J. Hayashi","doi":"10.14356/kona.2021003","DOIUrl":"https://doi.org/10.14356/kona.2021003","url":null,"abstract":"In this paper, recent developments of the devolatilization model and soot-formation model for the numerical simulations of pulverized-coal combustion fields, and the technology used to measure soot particles in pulverized-coal combustion fields are reviewed. For the development of new models, the validation of the developed models using measurement is necessary to check the accuracy of the models because new models without validation have a possibility to make large errors in simulations. We have developed the tabulated devolatilization process model (TDP model) that can take into account the effect of particle heating rate on the volatile matter amount and the devolatilization-rate parameters. The accuracy of the developed TDP model was validated by using the laser Doppler velocimetry data for the bench-scale coal combustion test furnace. The soot-formation model combined with TDP model for the large eddy simulation (LES) has been also developed. The spatial distributions of both the soot-volume fraction and the polycyclic aromatic hydrocarbons were measured by virtue of laser-induced incandescence (LII) and laser-induced chemiluminescence (PAHs-LIF). The accuracy of the developed soot-formation model was validated by using the measured data.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"59 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72413256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

Screening of Ternary Intermetallic Catalysts Is Possible Using Metallurgical Synthesis: Demonstration on Heusler Alloys 利用冶金合成技术筛选三元金属间催化剂是可能的:以Heusler合金为例

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021008

T. Kojima, S. Kameoka, A. Tsai

{"title":"Screening of Ternary Intermetallic Catalysts Is Possible Using Metallurgical Synthesis: Demonstration on Heusler Alloys","authors":"T. Kojima, S. Kameoka, A. Tsai","doi":"10.14356/kona.2021008","DOIUrl":"https://doi.org/10.14356/kona.2021008","url":null,"abstract":"Intermetallic compounds are becoming hot materials as catalysts because they show unique catalytic properties that originate from a unique electronic structure and an atomic ordered surface. Ternary intermetallic catalysts have rarely been reported, which is likely due to the difficulty in synthesizing their supported nanoparticles, the typical form for catalysis research; however, there could be novel catalysts in ternary systems because they have much more elemental combinations than binary systems. They are expected to exhibit novel properties due to the synergy between three elements. Metallurgical methods, such as arc-melting, can easily synthesize intermetallic compounds even in ternary (or more) systems if they are thermodynamically stable. Thus, only metallurgical synthesis enables screening for ternary intermetallic catalysts. The catalyst screening of Heusler alloys, which are a group of ternary intermetallic compounds popular in other research fields, such as magnetics, has been conducted using metallurgical synthesis. The screening revealed fundamental catalytic properties of Heusler alloys for several reactions and identified good catalysts for the selective hydrogenation of alkynes. The systematic control of catalysis was also demonstrated by the substitution of fourth elements using a feature of Heusler alloys. This paper describes the importance of ternary intermetallic catalysts with practical examples of Heusler alloy catalysts and discusses future prospects.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"11 1","pages":"2021008"},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82015228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6

Agglomeration and Dispersion Related to Particle Charging in Electric Fields 电场中粒子带电的凝聚与色散

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021016

M. Shoyama, S. Matsusaka

{"title":"Agglomeration and Dispersion Related to Particle Charging in Electric Fields","authors":"M. Shoyama, S. Matsusaka","doi":"10.14356/kona.2021016","DOIUrl":"https://doi.org/10.14356/kona.2021016","url":null,"abstract":"Electrostatic forces cause spontaneous movement of charged particles; subsequently, electrostatic technology is attracting attention because of its application in powder handling processes, such as separation, classification, dispersion, and collection. Dielectric and conductive particles are charged by induction in a strong electric field and moved by Coulomb forces. The magnitude and polarity of the transferred charges are controlled by the strength and direction of the electric field. The dielectric particles are also polarized in the electric field, and dipole interactions occur between particles or in the particle layers, complicating the particle behavior. This review paper presents induction charging, agglomeration, levitation, and other behaviors resulting from particle layers in electric fields. A series of particle phenomena occur in parallel electrode systems, which consist of a lower plate electrode and an upper mesh electrode. Charged agglomerates are formed on the particle layers, levitated by the Coulomb forces, and disintegrated with rotation when approaching the mesh electrode. The mechanisms of agglomeration and disintegration have been elucidated in multiple studies, including microscopic observations and theoretical analyses of particle motion, based on numerical calculations of the electric field. Furthermore, a new system is proposed for continuous feeding of dispersed particles using electric fields and vibration.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"4 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82976537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6

3rd International Hosokawa Powder Technology Symposium Held in China 第三届细川粉体技术国际研讨会在中国召开

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021022

{"title":"3rd International Hosokawa Powder Technology Symposium Held in China","authors":"","doi":"10.14356/kona.2021022","DOIUrl":"https://doi.org/10.14356/kona.2021022","url":null,"abstract":"As the special event aiming at the globalization in Asia of the Hosokawa Powder Technology Foundation, the 3rd International Hosokawa Powder Technology Symposium took place on Tuesday, November 19, 2019, at the Shanghai Institute of Ceramics of the Chinese Academy of Sciences (SICCAS) in China. This International Hosokawa Powder Technology Symposium was held abroad for the third time after the first one (2014, at Hosokawa Alpine AG in Augsburg, Germany) and the second (2017, at Hosokawa Micron Powder Systems Div. in New Jersey, U.S.A.) organized by the Hosokawa Powder Technology Foundation (HPTF). It was co-organized by the SICCAS and the Society of Powder Technology, Japan (SPTJ) and supported by the Hosokawa Micron Corporation (HMC) and Hosokawa Micron (Shanghai) Powder Machinery Co., Ltd. (HMS). At the symposium, five lectures were given on the theme of “Powder and Particle Technology for Advanced Materials” after the opening remarks of President Yoshio Hosokawa. In the first lecture, high-purity, ultra-fine powder production and processing technologies for advanced materials such as ultra-high temperature heat-resistant rocket members, reflectors, and transparent materials were presented. Then the new nanoparticle size measuring devices, and the in-situ and real-time nanoparticle measurement using this device was introduced. The third lecture was concerning the functional materials based on the form of natural organisms to create new innovative functionalities. After the lectures by the Chinese professors, two presentations were given from the Hosokawa Group on the application of powder processing technology to various industrial product fields, and the devel opment and commercialization of cosmetics and pharmaceuticals using PLGA nanoparticles. Finally, Mr. Uchida of HMS closed the conference with the closing remarks. The symposium","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"82 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81452516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

From Quasi-static to Intermediate Regimes in Shear Cell Devices: Theory and Characterisation 剪切细胞装置从准静态到中间状态:理论和表征

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/KONA.2021018

Victor Francia, L. A. A. Yahia, R. Ocone, A. Ozel

{"title":"From Quasi-static to Intermediate Regimes in Shear Cell Devices: Theory and Characterisation","authors":"Victor Francia, L. A. A. Yahia, R. Ocone, A. Ozel","doi":"10.14356/KONA.2021018","DOIUrl":"https://doi.org/10.14356/KONA.2021018","url":null,"abstract":"The design of new technology for processing and manufacturing particulate products requires understanding granular rheology over a broad range of conditions. Powders display a complex behaviour due to their ability to rearrange under stress, and as a result, granular flow is generally classified into three flow regimes, namely a quasi-static regime dominated by frictional contacts, an inertial regime dominated by collisional and kinematic stresses and an intermediate regime where the three sources of stress are important to establish a stress-strain rate relationship. Characterisation of the flowability is generally restricted to the flow initiation in quasi-static regime, even if, transition into inertial conditions is very common in practical applications involving the control of dense flows, such as powder handling, particle formation processes or additive manufacturing. This work presents a critical review of available techniques to characterise the departure from the quasi-static regime into an intermediate flow. We revise the application of shear cells and present different strategies to modify classic devices with external actuation, such as aeration, to operate at higher inertial numbers. We pay particular attention to innovative designs using aerated Couette flow configurations, highlight the complexity in the standardisation and the challenges in advancing towards a universal model.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"20 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78649072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 8

The Properties of Kaolin from Different Locations and Their Impact on Casting Rate 不同产地高岭土的性能及其对浇注率的影响

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-10 DOI: 10.14356/kona.2021002

Mervat Said Hassan Badr, S. Yuan, Jiaqi Dong, H. El-Shall, Yamile A. Bermudez, D. C. Ortega, Jorge E. Lopez-Rendon, B. Moudgil

{"title":"The Properties of Kaolin from Different Locations and Their Impact on Casting Rate","authors":"Mervat Said Hassan Badr, S. Yuan, Jiaqi Dong, H. El-Shall, Yamile A. Bermudez, D. C. Ortega, Jorge E. Lopez-Rendon, B. Moudgil","doi":"10.14356/kona.2021002","DOIUrl":"https://doi.org/10.14356/kona.2021002","url":null,"abstract":"It has been well known that mineral samples from different locations and origins can exhibit a significant shift in their properties and behavior. The present study of three samples of kaolin from a wide set of origin of deposits, composition, and ceramic properties, provided an important and perhaps a unique opportunity for investigating the interdependence of mineralogy, chemical composition, particle morphology, and surface property with their rheological behavior in ceramic applications such as casting rate. The X-ray diffraction patterns of kaolin samples #2 and #3 suggested low crystallinity with Hinckley Index (HI) ranging between 0.78 and 0.8. On the other hand, kaolin sample #1 was highly ordered with HI of about 1.21, and it had higher quartz content. This free quartz could enhance the permeability and hence increase the casting rate. The abundance of divalent ions (Ca 2+ and Mg 2+ ) in samples #2 & #3 could result in the collapse of the electrical double layer and reduction of zeta potential, consequently, coagulation of the particles leading to an increase of viscosity and dispersant demands. The morphology study suggested the platelet particles in samples #2 & #3 would lead to slower dewatering, thus, lower casting rate than that of the blocky (lower aspect ratio and narrower size distribution) particles in sample #1.","PeriodicalId":17828,"journal":{"name":"KONA Powder and Particle Journal","volume":"14 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91122246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Smart Powder Processing for Excellent Advanced Materials and Its Applications 优质先进材料的智能粉末加工及其应用

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2021-01-01 DOI: 10.14356/kona.2023001

M. Naito, T. Kozawa, A. Kondo, C.C. Huang

引用次数: 2

Influence of Anions and Cations on the Formation of Iron Oxide Nanoparticles in Aqueous Media 阴离子和阳离子对水介质中氧化铁纳米颗粒形成的影响

IF 4.1 4区材料科学

KONA Powder and Particle Journal Pub Date : 2020-11-28 DOI: 10.14356/kona.2022003

Hidekazu Tanaka

引用次数: 1