fluidized silicon particle



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Chemical vapor deposition of silicon from silane: Review ,
Chemical vapor deposition of silicon from silane: Review ,

An alternative to the Siemens reactor is the fluidized bed reactor (FBR) In a FBR, the reactor vessel is filled with silicon particles Fig 1A fluidizing gas like hydrogen or helium is injected at the bottom of the reactor to fluidize the particl

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Effect of Bed Characters on the Direct Synthesis of ,
Effect of Bed Characters on the Direct Synthesis of ,

Many fluidized bed characters such as superficial gas velocities, bed temperature, bed heights and particle size, have certainly the vital effect on the various transport processes, and then on the direct synthesis process Ward et al 1 also pointed out that the reactor type has an important effect on the direct synthesis process With good .

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Fluidized Bed Reactor - an overview | ScienceDirect Topics
Fluidized Bed Reactor - an overview | ScienceDirect Topics

Fluidized bed reactors have been studied in several reactor engineering researches for OCM, also quite stable and efficient performance was reported especially in case of reactor operability and safety concerns Due to the large exothermic of the OCM reaction, a fluidized bed reactor enables an almost isothermal reactor performance in OCM and was therefore the first investigated reactor type

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CHARACTERIZATION OF POLYCRYSTALLINE SILICON ,
CHARACTERIZATION OF POLYCRYSTALLINE SILICON ,

characterization of polycrystalline silicon particles produced via cvd from monosilane in a fluidized bed reactor m matsukata, t odagiri, t kojima to cite this version: m matsukata, t odagiri, t kojima characterization of polycrystalline silicon particles produced via cvd from monosilane in a fluidized ,

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SCHWING | Applications and markets
SCHWING | Applications and markets

In the fluidized bed the product (solids particle) is held in a vertical “gas flow suspension” and thereby ensures optimal process management Energy-saving potential up to 40% and numerous other benefits make the fluidized bed reactor a true alternative to the rotary furnace (see table for details)

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Influence of Particle Shape and Bed Height on Fluidization
Influence of Particle Shape and Bed Height on Fluidization

11 Abstract of Thesis Presented to the Graduate Scho ol of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Master of Science INFLUENCE OF PARTICLE SHAPE AND BED HEIGHT ON FLUIDIZATION By Lingzhi Liao May 2013 Chair: Jennifer S Curtis Major: Chemical Engineering Flui dized bed s ha ve been widely used in .

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Silicon particle growth in a fluidized‐bed reactor, Aiche ,
Silicon particle growth in a fluidized‐bed reactor, Aiche ,

Silicon particle growth in a fluidized‐bed reactor Silicon particle growth in a fluidized‐bed reactor Hsu, George; Rohatgi, Naresh; Houseman, John 1987-05-01 00:00:00 This paper describes the overall operation of a 15 cm dia fluidized‐bed reactor for silicon production via silane pyrolysis The fluidized‐bed reactor has been characterized by its performance data and parametric effects

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Fluidized bed silicon deposition (Conference) | OSTIGOV
Fluidized bed silicon deposition (Conference) | OSTIGOV

Abstract The growth of silicon on seed particles from the pyrolysis of silane in a fluidized bed reactor (FBR) was studied The grown particles were shown to be crystalline and to have a structure which has been interpreted to indicate growth by chemical vapor deposition as well as by the collection (scavenging) of silicon clusters on seed particle surfac

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Fluidized Bed flow regimes rev1 - Rowan University
Fluidized Bed flow regimes rev1 - Rowan University

fluidized bed will be employed in your chemical reaction engineering course in which you will assume that the bubbling bed is a well-mixed reactor This is a reasonable approximation of a fluidized bed, but there are many more complicated models that can be seen in the above figure

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US5312948A - Particle size distribution for fluidized-bed ,
US5312948A - Particle size distribution for fluidized-bed ,

The present invention is an improved process for the reaction of an alkyl halide with particulate silicon in a fluidized-bed process The improvement comprises controlling the particle size of the silicon within a range of one micron to 85 microns Preferred is when the particle size of the silicon has a mass distribution characterized by a 10th percentile of 21 to 6 microns, a 50th .

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Fluidized bed silicon deposition (Conference) | OSTIGOV
Fluidized bed silicon deposition (Conference) | OSTIGOV

The growth of silicon on seed particles from the pyrolysis of silane in a fluidized bed reactor (FBR) was studied The grown particles were shown to be crystalline and to have a structure which has been interpreted to indicate growth by chemical vapor deposition as well as by the collection (scavenging) of silicon clusters on seed particle .

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Experimental Investigation of Various Solid Particle ,
Experimental Investigation of Various Solid Particle ,

Experimental Investigation of Various Solid Particle Materials on the Steady State Gas-Solid Fluidized Bed System , chemical reactors, dryers, silicon chloridization and particle drying) due to its large gas-particle contact area, good mixing, high heat and mass transfer rates and relatively low axial mixing of the gas , fluidized beds .

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Chemical Vapor Deposition of Silicon from Silane Pyrolysis
Chemical Vapor Deposition of Silicon from Silane Pyrolysis

fluidized bed reactor, experimental studies of Sin4 pyrolysis and fine particle fluidization, and thermodynamic and chemical engineering analysis of the reactions in the fluidized process for silicon production The initial phase of the effort in analysis of silicon chemical vapor deposition is described in ,

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Silicon particle growth in a fluidized‐bed reactor - Hsu ,
Silicon particle growth in a fluidized‐bed reactor - Hsu ,

This paper describes the overall operation of a 15 cm dia fluidized‐bed reactor for silicon production via silane pyrolysis The fluidized‐bed reactor has been characterized by its performance data and parametric effects A withdrawal system is used to selectively remove big particl

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Fluidization and fluidized bed - SlideShare
Fluidization and fluidized bed - SlideShare

Nov 24, 2015· Fluidization and fluidized bed , aerodynamic drag on each particle is also low, and thus the bed remains in a fixed state , Application of Fluidization Fluidized solids can be easily transferred between reactors The intense mixing within a fluidized bed means that its temperature is uniform There is excellent heat transfer between a .

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Hydrochlorination of silicon in a fluidized-bed reactor ,
Hydrochlorination of silicon in a fluidized-bed reactor ,

Hydrochlorination of metallurgical grade silicon in fluidized-bed reactor was studied with a temperature controlled within +- 5/sup 0/C/ The hydrogen chloride gas velocity varies from 2 to 5 mu/mu/sub mf/, temperature from 340/sup 0/C to 400/sup 0/c and silicon particle size from 124 mum .

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Fluidization XVI | AIChE
Fluidization XVI | AIChE

Fluidization is an important field of both fundamental research and broad industrial applications Current understanding of the complex fluid-particle multiphase flow patterns, coupled with heat and mass transfer and chemical reactions, is still incomplete

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Fluidization and Spouting of Fine Particles: A Comparison
Fluidization and Spouting of Fine Particles: A Comparison

The fluidization characteristics of fine particles have been studied in both the fluidized bed and spouted bed The effect of different system parameters (viz static bed height, particle size, particle density and superficial velocity of the fluidizing medium, rotational speed of stirrer, and spout diameter) on the fluidization characteristics such as bed expansion/fluctuation ratios, bed .

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Silicon coating on very dense tungsten particles by ,
Silicon coating on very dense tungsten particles by ,

Silicon coating on very dense tungsten particles by fluidized bed CVD for nuclear application: Silicon coating on very dense tungstenparticles by fluidized bed CVD , Fluidized-bed silicon .

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The effect of pretreatment in a fluidized , - SpringerLink
The effect of pretreatment in a fluidized , - SpringerLink

A deposition density of about 10 7 mm −2 was obtained on single-crystal silicon particles pretreated for 15 h The effectiveness of the fluidized bed pretreatment on the deposition density was observed to be appreciable for the four kinds of particle examined

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PSRI - Home - Particulate Solid Research, Inc
PSRI - Home - Particulate Solid Research, Inc

Particulate Solid Research Inc (PSRI) is an international consortium of companies focused on the advancement of technology in the multiphase flows with granular and granular-fluid systems Since 1971, PSRI has amassed a prolific amount of design data, technology, know-how, design criteria and models on all aspects of slurries, liquid injection, fluidization, entrainment, pneumatic conveying .

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Effect of Bed Characters on the Direct Synthesis of ,
Effect of Bed Characters on the Direct Synthesis of ,

Effect of Bed Characters on the Direct Synthesis of Dimethyldichlorosilane in Fluidized Bed Reactor , Figure 3 shows the effects of the silicon particle diameter (dp) range from 80 to 250 μm .

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Six degrees of fluidization - Powder and Bulk Engineering ,
Six degrees of fluidization - Powder and Bulk Engineering ,

purity silicon, polyvinyl chloride, acrylonitrile, xylene, and other products Many bulk solids dryers and heat treaters use fluidization to achieve even, efficient heat transfer Some classification operations even use fluidization to obtain the desired particle-size separation In some cases, however, fluidization can be a detriment, such as .

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Device for applying coatings to particles in a fluidized ,
Device for applying coatings to particles in a fluidized ,

Device for applying coatings to particles in a fluidized bed , are often added to material systems to modify mechanical, dielectric, optical, or other properti However, the particle often needs a coating to optimize its contribution to the material , bringing over 18 years of Silicon ,

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Effect of Fluidized Bed Particle Size on Heat Transfer ,
Effect of Fluidized Bed Particle Size on Heat Transfer ,

tube of 8 mm diameter was immersed in a fluidized bed Three types of fluidized beds were used with different sand particle diameters of (280, 490 and 750) µm, using air as the fluidizing flu The results showed that the heat transfer coefficient increases with decreases in the size of

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Simulation of a Silicon CVD Spouted Fluidized Bed Reactor ,
Simulation of a Silicon CVD Spouted Fluidized Bed Reactor ,

describes the batch growth of silicon particles in a chemical vapor deposition (CVD) submerged spouted bed reactor is extended to simulate semi-batch operations with periodic seeds additions and product extractions This model takes into account the fluidized bed reactor as well as a population balance equation representing particle

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Producing Poly-Silicon from Silane in a Fluidized Bed Reactor
Producing Poly-Silicon from Silane in a Fluidized Bed Reactor

Producing Poly-Silicon From Silane in a Fluidized Bed Reactor 5 Fig 6 Fluidized bed reactor with seed generator the bulk silicon to a speci c particle size distribution suitable for use as seed particl

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Minimum fluidization velocity, bubble behaviour and ,
Minimum fluidization velocity, bubble behaviour and ,

particle sizes, particle size distribution and superficial gas velocity are influencing on the flow behaviour and mixing Fluidized bed reactors are used in production of silicon for solar cells The gas-particle reaction is a continuous process where the particles are fully consumed during the reaction and the

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DESING OF A UTILITY SCALE SOLAR THERMAL TOWER ,
DESING OF A UTILITY SCALE SOLAR THERMAL TOWER ,

fluidized bed a maximum flux G of 100 kg/m2 is assumed This value is based on the authors’ experience of dense particle suspension flows The heat transfer coefficient k is about 800-900 W/m2K for such an indirect particle receiver The receiver is aimed for a solar flux of 600 kW/m2 at the

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Basic Design of a Fluidized Bed Reactor for Wastewater ,
Basic Design of a Fluidized Bed Reactor for Wastewater ,

Fluidized bed reactor is widely applied in many industries for various applications recently It has been found promising to use fluidized bed reactor for water treatment procedur When the conventional treatment procedures failed to remove recalcitrant compounds in waste water, advanced , In our transition fluidized bed particle

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