Electrostatic effects on entrainment from a fluidized bed

Baron, Thomas; Briens, Cédric; Bergougnou, M.A.; Hazlett, John D.

doi:10.1016/0032-5910(87)80125-0

Cited by 38 publications

(20 citation statements)

References 8 publications

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“…Baron et al [15] studied the effects of electrostatics on fine particle entrainment. They observed that entrainment reduced with a decrease of relative humidity.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics and electrostatic modeling of polymerization fluidized-bed reactors

Rokkam

Fox

Mühle³

2010

Powder Technology

113

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“…Baron et al [15] studied the effects of electrostatics on fine particle entrainment. They observed that entrainment reduced with a decrease of relative humidity.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics and electrostatic modeling of polymerization fluidized-bed reactors

Rokkam

Fox

Mühle³

2010

Powder Technology

113

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“…They commented that electrostatic forces, which are affected by humidity, had only a minor role to play in their system. Baron et al (1987b), on the other hand, found that particle entrainment from a 61-cm I.D. bubbling fluidized bed of sand was increased when the fluidizing gas humidity was increased.…”

Section: Present Address Atochem Usine De Mont Argagnon 64300 Orthmentioning

confidence: 98%

“…The results reported here were, however, obtained from measurements conducted above the TDH. More detailed descriptions of the equipment and experimental procedure are provided by Baron (1987aBaron ( , 1987bBaron ( , 1990 and Briens et al (1988).…”

Section: Study With Sand Particlesmentioning

confidence: 99%

Size distribution of the particles entrained from fluidized beds: Gas humidity effects

Baron

Hazlett²,

Bergougnou

et al. 1992

Can J Chem Eng

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Experimental results obtained with 65 μm sand and 69 μm cracking catalyst showed that the smallest particles were not the most easily elutriated from fluidized beds of mixed size particles. This is in contradiction with the assumption applied to existing models for the prediction of the flux and size distribution of particles elutriated from a fluidized bed. The smallest particles cannot be removed by elutriation from a mixture of particles of various sizes. The smallest particles may be agglomerated with larger particles. Increasing the gas humidity, which would presumably reduce electrostatic effects, did not greatly affect the size distribution of the elutriated particles.

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“…Experimental results obtained by Baron et al . with 65 µm sand and 69 µm cracking catalyst showed that increasing the gas humidity, which would presumably reduce electrostatic effects, did not greatly affect the size distribution of the elutriated particles.…”

Section: Introductionmentioning

confidence: 99%

Study on fluidization of 0.5 µm ultrafine and 8.0 µm superfine Geldart-C powders in a binary mixture circulating fluidized bed

Abdelghany

Farrag

Barakat

2013

Int. J. Energy Res.

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SUMMARY The present study investigates the discharge rates of ultrafine and superfine powders from a semi‐batch circulating fluidized bed (CFB) using a binary mixture of fine Al(OH)3 powders (mean size 0.5 and 8.0 µm, Geldart‐C) and coarse fluidized catalytic cracker (FCC) particles (mean size 6 µm, Geldart‐A). Discharge rates of fine powders were measured at the top of the cyclone. Effects of the equilibrium water content of coarse FCC particles on the performance of the CFB, in terms of discharge rates of fine powders, were investigated at a starting loading of fine powders of 5 wt%. The discharge rates of the cohesive ultrafine powders were much smaller than the discharge rates of the less cohesive superfine powders, irrespective of the water content of FCC particles. In the presence of 8.0 µm superfine powders, the discharge rates decreased with decreasing the loading of superfines in the bed. At a certain loading of superfines, specifically at high equilibrium water contents in the range of 0.061 and 0.067 kg‐water/kg‐dry FCC, discharge rates decreased with decreasing the equilibrium water content of FCC particles. For FCC particles of low equilibrium water content as 0.038 kg‐water/kg‐dry FCC, discharge rates were low at the beginning then increased to maximum, within a few minutes, then decreased again with decreasing the loading of superfines in the bed. In the presence of 0.5 µm ultrafine powders, at high water equilibrium content of FCC particles as 0.067 kg‐water/kg‐dry FCC, the discharge rates decreased with decreasing the loading of ultrafines in the bed. However, at the two relatively low equilibrium water contents of FCC particles of 0.038 and 0.061 kg‐water/kg‐dry FCC, the discharge rates were almost constant. The cohesive property of ultrafine powders prevailed. Copyright © 2013 John Wiley & Sons, Ltd.

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Electrostatic effects on entrainment from a fluidized bed

Cited by 38 publications

References 8 publications

Computational fluid dynamics and electrostatic modeling of polymerization fluidized-bed reactors

Computational fluid dynamics and electrostatic modeling of polymerization fluidized-bed reactors

Size distribution of the particles entrained from fluidized beds: Gas humidity effects

Study on fluidization of 0.5 µm ultrafine and 8.0 µm superfine Geldart-C powders in a binary mixture circulating fluidized bed

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