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A critical analysis of the acceleration length and pressure profile of single‐particle systems in a circulating fluidized bed
Author(s) -
Das Mitali,
Meikap B. C.,
Saha R. K.
Publication year - 2008
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.181
Subject(s) - fluidized bed , acceleration , fluid catalytic cracking , fluidized bed combustion , particle (ecology) , coal , materials science , cracking , mechanics , particle size , critical ionization velocity , mineralogy , chemistry , thermodynamics , composite material , physics , chemical engineering , geology , engineering , classical mechanics , organic chemistry , oceanography
Abstract A study was conducted to explore the hydrodynamic behaviors using both Geldart group A and B materials in a circulating fluidized bed unit consisting of fast column (riser) of 0.1016 m i.d. and 5.62 m height. The materials tested were 120 µm of the fluid catalytic cracking (FCC) catalyst, 166 µm of iron ore, 215 µm of coal and five types of sand particles, ranging in size from 300 to 622 µm. The superficial air velocity ranged between 2.01 and 4.681 m/s and solid fluxes of 12.5–50 kg/m 2 s. Riser static pressure profiles were measured for the FCC catalyst, coal, iron ore and sand particles. Acceleration lengths were determined from the data, and using these and other data from the literature two correlations for the acceleration length were established for Geldart's group A and B particles. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.