Minimum fluidization velocity: Fluid cracking catalysts and spherical glass beads
1971; Elsevier BV; Volume: 4; Issue: 3 Linguagem: Inglês
10.1016/0032-5910(71)80025-6
ISSN1873-328X
Autores Tópico(s)Mineral Processing and Grinding
ResumoThe minimum fluidization velocity in ambient air was measured for some 20 different fluid cracking catalysts along with spherical glass beads run concurrently for comparison and control. The results agree with Leva's equation. For the broad distribution materials, the characteristic diameter to be used with this equation was calculated using the inverse weight mean diameter, as recommended. In the special case of tire cracking catalysts only, this diameter can be conveniently approximated by the 50 wt.% point of the experimental logarithmic probability distribution curve. For all of the catalysts and the smaller sizes of glass beads, the bed density at minimum fluidization was less than the pressure differential per unit bed height.
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