1973
DOI: 10.1016/0032-5910(73)80037-3
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Types of gas fluidization

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Cited by 3,049 publications
(1,448 citation statements)
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“…This effect could cause defluidization in some regions of the bed, particularly in the vicinity of the jet, because the gas flow has been reduced under minimum fluidization conditions. This effect is similar to the one caused by the rat-holes that appear when type C particles are fluidized [22]. The ejection of solids is violent, and the dome and wake of one erupting bubble collides with the particles ejected by the previous ones.…”
Section: Jet Spike Mechanismmentioning
confidence: 57%
See 1 more Smart Citation
“…This effect could cause defluidization in some regions of the bed, particularly in the vicinity of the jet, because the gas flow has been reduced under minimum fluidization conditions. This effect is similar to the one caused by the rat-holes that appear when type C particles are fluidized [22]. The ejection of solids is violent, and the dome and wake of one erupting bubble collides with the particles ejected by the previous ones.…”
Section: Jet Spike Mechanismmentioning
confidence: 57%
“…Spherical glass particles with a mean particle diameter of 350 m and a density of 2500 kg/m 3 (type B according to Geldart's classification [22]) were fluidized with air. The height of the fixed bed was approximately 30 cm, and the superficial gas velocity during the experiments was varied between 1 ≤ U/U mf ≤ 2.…”
Section: Experimental Set-upmentioning
confidence: 99%
“…Scanning Electron Microscope image of the prepared catalyst grain is shown in Figure 2. The catalyst was assigned to group A by Geldart's classifi cation (based on the density and particle size) 23 . This kind of catalyst Figure 4.…”
Section: Experimental Partmentioning
confidence: 99%
“…The particle size is conventionally achieved by secondary processing of crystalline drug using energy intensive air-jet micronisation (Chan, 2006). However, due to the high interparticle forces in micronised, cohesive Geldart type C (Geldart, 1973) powders, and low doses required for drug delivery to the lungs, metering of and fluidising a drug only dose is onerous. Thus, to allow adequate metering and increased flowability of the powder, the micronised drug is commonly formulated with coarser, fluidisable Geldart type A (Geldart, 1973) carrier particles.…”
Section: Introductionmentioning
confidence: 99%
“…However, due to the high interparticle forces in micronised, cohesive Geldart type C (Geldart, 1973) powders, and low doses required for drug delivery to the lungs, metering of and fluidising a drug only dose is onerous. Thus, to allow adequate metering and increased flowability of the powder, the micronised drug is commonly formulated with coarser, fluidisable Geldart type A (Geldart, 1973) carrier particles. The carrier of choice for DPI formulations is most often alpha lactose monohydrate.…”
Section: Introductionmentioning
confidence: 99%