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Full-Text Articles in Engineering
Chemically Modified Graphene-Based Composite Paper Electrodes For Longcycle Metal-Ion Batteries, Gurpreet Singh
Chemically Modified Graphene-Based Composite Paper Electrodes For Longcycle Metal-Ion Batteries, Gurpreet Singh
Composites at Lake Louise (CALL 2015)
No abstract provided.
Development Of A New Measurement Method To Evaluate The Physical Properties Of Granules For Dry Powder Inhalation Produced By New Spouted Bed Type Binderless Granulator, Shigenobu Hatano, Nobuyuki Nakamura, Nobusuke Kobayashi, Yoshinori Itaya, Shigekatsu Mori, Yasuhiro Shimada
Development Of A New Measurement Method To Evaluate The Physical Properties Of Granules For Dry Powder Inhalation Produced By New Spouted Bed Type Binderless Granulator, Shigenobu Hatano, Nobuyuki Nakamura, Nobusuke Kobayashi, Yoshinori Itaya, Shigekatsu Mori, Yasuhiro Shimada
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
The spouted bed type of binderless granulator is one of the most appropriate methods available for producing granules of dry powder inhalation (DPI) from cohesive fine powder. However the compressive strength of produced granule is too small to be measure by conventional method. In this work a new apparatus was developed to evaluate the strength of such a soft granule. Load and displacement curve of the granule were measured by new method of compressive strength measurement. To observe the compression process of the granule, photographs were taken with a microscopic camera. It was clarified that this measurement method was remarkably …
Mechanistic Study Of Nano-Particle Fluidization, X. S. Wang, F. Rahman, Martin J Rhodes
Mechanistic Study Of Nano-Particle Fluidization, X. S. Wang, F. Rahman, Martin J Rhodes
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
Degussa Aerosil R974 powder, with a primary particle size of 12 nm, was fluidized using nitrogen in a cylindrical vessel, 50-mm-id and 900 mm in height. Characteristics of incipient fluidization are analysed in relation to variations in the initial packing conditions. Bed collapse experiments were performed and the results are used for assessing fluidization characteristics of the particles. It was found that nanoparticles exhibit characteristics of both Group A and Group C powders. Various methods for estimating the cohesion forces between nanoparticle aggregates are discussed.
Improved Li-Ion Battery Performance By Coating Cathode Nano-Particles Using Atomic Layer Deposition, Renske Beetstra, John Nijenhuis, Erik M. Kelder, J. Ruud Van Ommen
Improved Li-Ion Battery Performance By Coating Cathode Nano-Particles Using Atomic Layer Deposition, Renske Beetstra, John Nijenhuis, Erik M. Kelder, J. Ruud Van Ommen
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
The use of nanoparticles as a cathode in Li-ion batteries is very promising. However, many of the cathode materials that could be economically attractive suffer from degradation. Therefore, an objective is to stabilise the surface, in order to reduce the degradation. A setup was build to coat the nanoparticles by atomic layer deposition in a fluidised bed reactor. The first fluidisation results for the nanoparticles are presented in this paper.
Role Of Sound Vibration During Aeration Of Nano-Sized Powders, Paola Ammendola, Riccardo Chirone
Role Of Sound Vibration During Aeration Of Nano-Sized Powders, Paola Ammendola, Riccardo Chirone
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
The behaviour of two different nano-sized powders, Al2O3 (40 nm) and SiO2 (15 nm), during aeration has been investigated in a laboratory scale fluidized bed. The fluidization quality of both powders is very poor without application of acoustic fields even if some bed expansion has been found. The application of acoustic fields of intensities larger than 135 dB and frequencies close to 120 Hz is able to increase the fluidization quality of both powders. Sound is also able to promote an apparent self-fluidization of a relatively thin portion of the upper part of the bed. The possibility that there is …
Evaluation Of Assisted Fluidization Of Nanoagglomerates By Monitoring Moisture In The Gas Phase And The Influence Of Gas Viscosity, Jose Quevedo, Daniel Lepek, Robert Pfeffer, Rajesh N. Dave
Evaluation Of Assisted Fluidization Of Nanoagglomerates By Monitoring Moisture In The Gas Phase And The Influence Of Gas Viscosity, Jose Quevedo, Daniel Lepek, Robert Pfeffer, Rajesh N. Dave
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
We have previously reported that the fluidization of nanoparticle agglomerates can be enhanced by the addition of external force fields such as vibration, acoustic waves, centrifugal force, and magnetic particles. The criteria usually used to evaluate the enhancement in fluidization quality are the fluidized bed expansion, pressure drop, and visual appearance of the fluidized bed to determine the presence of bubbles, large heavy agglomerates and/or channeling and spouting. Here we introduce a different approach based on measuring the rate of absorption/desorption of moisture (humidification/drying) of hydrophilic fluidized nanopowders. The fluidizing gas was humidified in a controlled manner, and the amount …
The Effect Of Vibrations On Fluidized Cohesive Powders, Diego Barletta, Giorgio Donsì, Giovanna Ferrari, Massimo Poletto, Paola Russo
The Effect Of Vibrations On Fluidized Cohesive Powders, Diego Barletta, Giorgio Donsì, Giovanna Ferrari, Massimo Poletto, Paola Russo
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
The fluidization of a cohesive silica powder has been tested with the help of mechanical vibration. The experiments showed how the effectiveness of vibrations changed with the vibrational acceleration and frequency. The aggregative behavior of powders has been highlighted and a model procedure is proposed to predict the aggregate size starting from the measurement of powder flow properties with conventional shear testers.
Vibro-Fluidization Characteristics For Size Arranged Agglomerates, Yoshihide Mawatari, Yuji Tatemoto, Katsuji Noda, Masato Yamamura, Hiroyuki Kage
Vibro-Fluidization Characteristics For Size Arranged Agglomerates, Yoshihide Mawatari, Yuji Tatemoto, Katsuji Noda, Masato Yamamura, Hiroyuki Kage
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
Fine cohesive powders (Geldart’s group-C) were fluidized with a vibro-fluidized bed. Diameters of the powder used in this study were 0.2μm. For 0.2μm titanium oxide powder, stable and relatively large agglomerates were observed. In this study, the size distribution of agglomerates was arranged by sieving to examine its effect on the fluidization characteristics, such as the minimum fluidization velocity, the minimum bubbling velocity and the bed expansion ratio. The fluidization characteristics were drastically influenced by the size distribution of agglomerates. It was found that the size arrangement of agglomerates was one of the factors to obtain stable fluidization state for …
An Investigation Of Carbon Nanotube Jet Grinding, Cedric Briens, Carole E. Baddour, Serge Bordere, Patrice Gaillard, Didier Anglerot
An Investigation Of Carbon Nanotube Jet Grinding, Cedric Briens, Carole E. Baddour, Serge Bordere, Patrice Gaillard, Didier Anglerot
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
The main challenges for the development of an industrial process for carbon nanotubes (CNTs) synthesis are the formation of agglomerates and the control of their size distribution. The project objective was to investigate the feasibility of CNT grinding with two arrangements. Experiments showed that a commercial jet mill can meet product quality requirements. However, in-situ grinding of CNTs, within the fluidized bed reactor, would improve both the productivity and quality of CNTs. A new, two-parameter grinding model shows that the primary grinding mechanism is fragmentation for the jet mill and erosion in the fluidized bed column.
Multi-Wall Carbon Nanotubes Obtained By Fluidized Bed Pyrolysis Of Virgin Or Recycled Plastics, Umberto Arena, Maria Laura Mastellone
Multi-Wall Carbon Nanotubes Obtained By Fluidized Bed Pyrolysis Of Virgin Or Recycled Plastics, Umberto Arena, Maria Laura Mastellone
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
A new technique for a continuous, mass production of high-quality multi-wall carbon nanotubes (MWCNTs), based on fluidized bed pyrolysis of polymers (virgin or recycled polyolefins and recycled polyethylene terephtalate), is described in detail. The study investigates the role of interactions between the bed material and the polymer particles injected into the reactor as well as that of the reactor temperature. Results are reported in terms of yield and quality of obtained MWCNTs, all characterized by thermogravimetrical analysis and SEM microscopy. The production of MWCNTs, in a relatively large quantity and at a low cost, is demonstrated as technically feasible.
Fluidized Bed Polymer Particle Ald Process For Producing Hdpe/Alumina Nanocomposites, Joseph A. Spencer, Xinhua Liang, Steven M. George, Karen J. Buechler, John Blackson, Charles J. Wood, John R. Dorgan, Alan W. Weimer
Fluidized Bed Polymer Particle Ald Process For Producing Hdpe/Alumina Nanocomposites, Joseph A. Spencer, Xinhua Liang, Steven M. George, Karen J. Buechler, John Blackson, Charles J. Wood, John R. Dorgan, Alan W. Weimer
The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
Micron-sized High Density Polyethylene (HDPE) particles were coated with ultrathin alumina (Al2O3) films in a Fluidized Bed Reactor (FBR) by Atomic Layer Deposition (ALD) at 77 ºC. Al2O3 films on the HDPE particles were confirmed by different methods. These particles were extruded conventionally with the ceramic shells mixing intimately in the polymer matrix. The successful dispersion of the Al2O3 shells in the polymer matrix following extrusion was confirmed using cross sectional Transmission Electron Microscopy (TEM).