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You searched for: Journal name Powder technology Remove constraint Journal name: Powder technology Publication year rev 7981-2019 Remove constraint Publication year rev: 7981-2019
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1. 2D-3D conversion method for assessment of multiple characteristics of particle shape and size

Author:
Takao Ueda; Tatsuya Oki; Shigeki Koyanaka
Source:
Powder technology 2019 v.343 pp. 287-295
ISSN:
0032-5910
Subject:
algorithms; databases; models; powders; surface roughness
Abstract:
... Accurate assessment of three-dimensional (3D) particle characteristics, such as particle shape and size distribution, is a basic requirement in various fields. In practice, however, two-dimensional (2D) characteristics are often measured instead of 3D, due to limitations of cost, speed, and so on. A conversion method which simultaneously estimates multiple 3D characteristics from measurable multip ...
DOI:
10.1016/j.powtec.2018.11.019

2. 3D Analysis of gravel surface texture

Author:
Hong-Wei Yang; Sérgio D.N. Lourenço; Béatrice A. Baudet; Clarence E. Choi; Charles W.W. Ng
Source:
Powder technology 2019 v.346 pp. 414-424
ISSN:
0032-5910
Subject:
fabrics; fractal dimensions; granite; gravel; hardness; interferometry; mineral content; minerals; particle size; powders; sand; scanners; soil; surface area; texture
Abstract:
... Surface texture plays an important role in understanding the mechanical and hydraulic behavior of a soil but has drawn little attention, especially for three dimensional parameters. Currently, the few studies on measurements and quantification of surface texture are limited to sand sized particles. To date, the surface texture of sand has been successfully obtained by using a high-resolution optic ...
DOI:
10.1016/j.powtec.2019.01.074

3. Accelerated heat transfer simulations using coupled DEM and CFD

Author:
M. Sousani; A.M. Hobbs; A. Anderson; R. Wood
Source:
Powder technology 2019 v.357 pp. 367-376
ISSN:
0032-5910
Subject:
bitumen; convection; drying; gases; industrial applications; mass transfer; models; powders; rotary dryers
Abstract:
... This work presents an accelerated simulation of heat and mass transfer by coupling Discrete Element Methodologies (DEMs) and Computational Fluid Dynamics (CFD), utilising Graphics Processing Unit (GPU) technology. The presented model is a continuation of previous work from Hobbs (2009) [1] and focuses on demonstrating the capabilities and effectiveness of implementing the GPU combined with the Cen ...
DOI:
10.1016/j.powtec.2019.08.095

4. Adhesion and desorption characteristics of high-temperature condensed flue gas dust on filter material surface

Author:
Lige Tong; Xudong Chen; Yanping Zhang; Shaowu Yin; Chuanping Liu; Li Wang; Yulong Ding
Source:
Powder technology 2019 v.354 pp. 760-764
ISSN:
0032-5910
Subject:
adhesion; desorption; dust; ferric oxide; flue gas; fly ash; powders; sodium chloride; temperature; tin
Abstract:
... This study is based on high-temperature flue gas containing condensed dust and the dust removal of granular bed. The effects of adhesion temperature, filter plate material (99% and 85% corundum), and dust materials (tin, ferric oxide, and fly ash mixed with sodium chloride) on the desorption stress of dust on the filter surface are explored through desorption stress tests. Results show that the de ...
DOI:
10.1016/j.powtec.2019.06.039

5. Adsorption-desorption characteristics and mechanisms of Pb(II) on natural vanadium, titanium-bearing magnetite-humic acid magnetic adsorbent

Author:
Manman Lu; Yuanbo Zhang; Youlian Zhou; Zijian Su; Bingbing Liu; Guanghui Li; Tao Jiang
Source:
Powder technology 2019 v.344 pp. 947-958
ISSN:
0032-5910
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorbents; adsorption; desorption; humic acids; ions; lead; magnetism; magnetite; nitric acid; pH; powders; remediation; soil; vanadium; wastewater
Abstract:
... Lead (Pb) ions are chronically detected in soil, underground and natural water, there is a need for low-cost in situ remediation techniques. A novel mineral based magnetic adsorbent, consisting of natural vanadium, titanium-bearing magnetite particles coated by humic acid (abbr. VTM-HA), was developed for removing Pb(II) from wastewater. In this study, adsorption-desorption characteristics and mec ...
DOI:
10.1016/j.powtec.2018.12.081

6. Aggregate density changes during the compression of flocculated silica

Author:
Michael R. MacIver; Marek Pawlik; Hassan Hamza
Source:
Powder technology 2019 v.350 pp. 43-50
ISSN:
0032-5910
Subject:
dewatering; drying; micro-computed tomography; mine tailings; porous media; powders; research programs; silica
Abstract:
... This paper reports the use of micro-computed tomography (CT) to measure changes in aggregate density in sediments of flocculated silica as a function of applied pressure over the course of a step-wise compression experiment. A micro-CT calibration method was developed that uses polymer-stabilized silica suspensions of varying solids concentration to permit the calculation of aggregate density and ...
DOI:
10.1016/j.powtec.2019.03.017

7. Alumina particle surface interaction in copolymer of isobutylene and maleic anhydride aqueous solution characterized by colloidal probe atomic force microscopy

Author:
Masahiro Yamamoto; Shunzo Shimai; Kazuki Oguma; Shiwei Wang; Hidehiro Kamiya
Source:
Powder technology 2019 v.354 pp. 369-376
ISSN:
0032-5910
Subject:
aluminum oxide; aqueous solutions; atomic force microscopy; composite polymers; dispersants; gelation; maleic anhydrides; powders; silica
Abstract:
... By the addition of isobutylene-maleic anhydride copolymer, Al₂O₃ aqueous suspensions retain fluidity for approximately 1 h and then gelation occurs. The bi-functionality mechanism as dispersant and gelling-agent of the copolymer was investigated by colloidal probe atomic force microscopy. The time-dependent surface interaction between Al₂O₃ particles and sapphire substrates were compared to those ...
DOI:
10.1016/j.powtec.2019.06.014

8. Alumina-silica nano-sorbent from plant fly ash and scrap aluminium foil in removing nickel through adsorption

Author:
Aditi Chatterjee; Jayanta K. Basu; Amiya K. Jana
Source:
Powder technology 2019 v.354 pp. 792-803
ISSN:
0032-5910
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; adsorbents; adsorption; alkali treatment; aluminum foil; endothermy; fly ash; nickel; pH; porous media; powders; power plants; scanning electron microscopy; sorption isotherms; surface area; temperature; thermodynamics; transmission electron microscopy
Abstract:
... The alumina-silica nano-sorbent with different alumina-silica ratio were synthesized from thermal power plant fly ash and scrap aluminium foil by alkali extraction, followed by precipitation and calcination. The adsorbent were used successfully for Ni(II) adsorption. The nano-sorbent was characterized by X-ray fluorescence analysis (XRF), X-ray diffraction analysis (XRD), Fourier Transform Infrare ...
DOI:
10.1016/j.powtec.2019.06.035

9. Analysing the porous structure of packed beds of spheres using a semi-analytical approach

Author:
Charl G. du Toit
Source:
Powder technology 2019 v.342 pp. 475-485
ISSN:
0032-5910
Subject:
equipment performance; mathematics and statistics; porosity; powders
Abstract:
... In this paper methodologies are described for the analysis of the porous structure of cylindrical and annular packed beds consisting of spheres when the coordinates and sizes of the spheres are known. Methodologies to determine the overlap between adjacent spheres and between the spheres and the walls of the container; axial variation in the porosity and hydraulic diameter; and the radial variatio ...
DOI:
10.1016/j.powtec.2018.10.017

10. Analysis of breakage patterns in a sheared layer of elongated particles

Author:
Marek Schöngut; Zdenĕk Grof; František Štĕpánek
Source:
Powder technology 2019 v.345 pp. 682-691
ISSN:
0032-5910
Subject:
discriminant analysis; equipment design; equipment performance; particle size; powders
Abstract:
... Discrete Element Method (DEM) simulations of elongated (i.e. needle-shaped) particles breakage in a shear field confined between two parallel plates, in analogy with processes occurring in a powder shear cell tester, were carried out. Effects of particle strength, shear rate and the compressive stress were investigated. The breakage patterns occurring in a layer of particles due to compressive and ...
DOI:
10.1016/j.powtec.2019.01.045

11. Analysis of conveyor belt flexure resistance

Author:
Brendan Beh; Craig A. Wheeler; Paul Munzenberger
Source:
Powder technology 2019 v.357 pp. 158-163
ISSN:
0032-5910
Subject:
hydraulic rams; laboratory experimentation; models; powders; prediction; rolling
Abstract:
... The University of Newcastle has designed and built a large test facility to measure the combined indentation rolling resistance and belt flexure resistance. This test facility allows tests to be conducted on a full-sized conveyor belt over a range of tensions and belt velocities and is designed in accordance with an Australian standard [1]. The test facility applies tension to the conveyor belt us ...
DOI:
10.1016/j.powtec.2019.08.067

12. Analysis of fluid-particle interaction in granular materials using coupled SPH-DEM method

Author:
Wen-Jie Xu; Xue-Yang Dong; Wen-Tao Ding
Source:
Powder technology 2019 v.353 pp. 459-472
ISSN:
0032-5910
Subject:
algorithms; computer software; hydrodynamics; mathematical models; powders; spinning
Abstract:
... In this study, based on Smoothed Particle Hydrodynamics (SPH) and Discrete Element Method (DEM), a multiphase fluid-solid coupling algorithm of SPH-DEM is provided, and a high performance coupling module is developed based on two open-source software platforms, namely: DualSphysics for SPH and Blaze-DEM for DEM. With a comparative analysis of three typical tests, it is systematically proved that t ...
DOI:
10.1016/j.powtec.2019.05.052

13. Anchovy oil microcapsule powders prepared using two-step complex coacervation between gelatin and sodium hexametaphosphate followed by spray drying

Author:
Bo Wang; Benu Adhikari; Motilal Mathesh; Wenrong Yang; Colin J. Barrow
Source:
Powder technology 2019 v.358 pp. 68-78
ISSN:
0032-5910
Subject:
anchovies; fish oils; fucoidan; gelatin; lipid content; microencapsulation; oxidative stability; powders; spray drying
Abstract:
... Anchovy oil was successfully encapsulated into multi-core microcapsule powder using a two-step microencapsulation method. The inner and outer shells of the microcapsules were created separately using gelatin-SHMP complex coacervates as shell materials. Fucoidan extract was used to crosslink these complex coacervates shells of microcapsules before spray drying. The spray dried microcapsules produce ...
DOI:
10.1016/j.powtec.2018.07.034

14. Anthocyanins from jussara (Euterpe edulis Martius) extract carried by calcium alginate beads pre-prepared using ionic gelation

Author:
Ana Gabriela da Silva Carvalho; Mariana Teixeira da Costa Machado; Helena Dias de Freitas Queiroz Barros; Cinthia Baú Betim Cazarin; Mário Roberto Maróstica Junior; Miriam Dupas Hubinger
Source:
Powder technology 2019 v.345 pp. 283-291
ISSN:
0032-5910
Subject:
Euterpe edulis; adsorption; anthocyanins; calcium alginate; chitosan; cold storage; color; cyanidin; encapsulation; environmental factors; gel strength; gelatin; gelation; hydrogels; intestines; pH; polymers; powders; viscosity; whey protein concentrate; zeta potential
Abstract:
... In order to take advantage of the functional properties of the jussara (Euterpe edulis Martius) extract, this study aimed at producing alginate hydrogel beads by ionic gelation process to carry jussara extract, increase its stability and to protect the anthocyanins from environmental conditions that interfere in stability and color of these compounds, such as the pH of the medium. Anthocyanins enc ...
DOI:
10.1016/j.powtec.2019.01.016

15. Application of a cyanobacterial extracellular polymeric substance in the microencapsulation of vitamin B12

Author:
Berta N. Estevinho; Rita Mota; José P. Leite; Paula Tamagnini; Luís Gales; Fernando Rocha
Source:
Powder technology 2019 v.343 pp. 644-651
ISSN:
0032-5910
Subject:
Cyanothece; Weibull statistics; gum arabic; microencapsulation; microparticles; models; polymers; powders; spray drying; vitamin B12
Abstract:
... The cyanobacterial extracellular polymeric substances (EPS) are heteropolysaccharides that possess characteristics suitable for food and pharmaceutical applications. In this work, an extracellular carbohydrate polymer isolated from the marine cyanobacterium Cyanothece sp. CCY 0110, alone or combined with arabic gum, was tested for the microencapsulation of the vitamin B12, the most chemically comp ...
DOI:
10.1016/j.powtec.2018.11.079

16. Application of open source FEM and DEM simulations for dynamic belt deflection modelling

Author:
Jiahe Shen; Craig Wheeler; Dusan Ilic; Jian Chen
Source:
Powder technology 2019 v.357 pp. 171-185
ISSN:
0032-5910
Subject:
computer software; conveyors; durability; finite element analysis; mathematical models; powders; prediction
Abstract:
... Belt deflection due to the belt weight and bulk solid loads is essential not only for reducing the flexure resistance but also for extending the service life of belt conveyors. Current theoretical analysis and numerical modelling have failed to fully consider the interaction between a belt and bulk solid and therefore are not suitable to investigate belt deflection under dynamic conditions. The ai ...
DOI:
10.1016/j.powtec.2019.08.068

17. Application of the theory of binary fluidization to solids of irregular shape: Choosing the granulometry of sand in processes for energy production from wastes of the olive oil industry

Author:
R. Girimonte; B. Formisani; V. Vivacqua
Source:
Powder technology 2019 v.345 pp. 563-570
ISSN:
0032-5910
Subject:
biomass; energy; equations; fats and oils industry; mixing; models; olive oil; olives; particle size; powders; sand; wastes
Abstract:
... The paper shows how the equations developed for modeling the fluidization process of two-solid mixtures, originally tested on mixtures of spherical particles, can successfully be extended to segregating fluidization of beds of irregular solids. The influence of particle shape on bed voidage at varying component concentration is analysed and it is demonstrated, in particular, that the relationship ...
DOI:
10.1016/j.powtec.2019.01.054

18. Applying Fréchet distance to evaluate the discrepancy of product size distribution between single particle and monolayer multi-particle breakage

Author:
P. Yu; W. Xie; L.X. Liu; M.S. Powell
Source:
Powder technology 2019 v.344 pp. 647-653
ISSN:
0032-5910
Subject:
energy; engineering; models; powders; progeny; specific energy
Abstract:
... Single particle breakage characterisation at fine sizes for use in mill modelling has been addressed by only a few researchers and is not utilised in engineering design. This is mainly due to the challenge of accurately imparting a range of impact energies to sub-millimetre particles and then measuring the progeny size distribution for the tiny resultant mass. In order to fill this gap, a disperse ...
DOI:
10.1016/j.powtec.2018.12.043

19. Assessment of a powder rheometer equipped with a cylindrical impeller for the measurement of powder flow properties at low consolidation

Author:
Marco Lupo; Denis Schütz; Elke Riedl; Diego Barletta; Massimo Poletto
Source:
Powder technology 2019 v.357 pp. 281-290
ISSN:
0032-5910
Subject:
aeration; friction; geometry; impellers; models; powders; rheometers; torque
Abstract:
... A powder rheometer equipped with a cylindrical impeller was studied to assess whether it could be suitable to derive quantitative physical parameters of powder flow properties. The equipment used in was the Powder Cell unit purposely developed by Anton Paar to fit on Anton Paar MCR Rheometers and to carry out torque measurements on aerated and not aerated powders. In this instrument, the state of ...
DOI:
10.1016/j.powtec.2019.08.071

20. Assessment of forces acting on fine particles on a traveling-wave electric field conveyor: Application to powder manipulation

Author:
Ayyoub Zouaghi; Noureddine Zouzou; Lucien Dascalescu
Source:
Powder technology 2019 v.343 pp. 375-382
ISSN:
0032-5910
Subject:
adhesion; electric field; particle size; polymethylmethacrylate; powders
Abstract:
... The purpose of this work is to investigate the transport mechanism of fine dielectric particles using a traveling-wave electric field conveyor. In the first part of this study, an experimental bench is set up to evaluate the efficiency of particle displacement according to their size and to visualize their motion. The displacement efficiency is evaluated based on the ratio of the mass of transport ...
DOI:
10.1016/j.powtec.2018.11.065