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Fluidization Behavior of Cohesive Ca(OH) 2 Powders Mixed with Hydrophobic Silica Nanoparticles
Author(s) -
Amjadi Omid,
Tahmasebpoor Maryam,
Aghdasinia Hassan
Publication year - 2019
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201800007
Subject(s) - fluidization , agglomerate , materials science , mixing (physics) , chemical engineering , fluidized bed , particle size , nanoparticle , adsorption , chromatography , mineralogy , chemistry , composite material , nanotechnology , organic chemistry , physics , quantum mechanics , engineering
Dry mixing with hydrophobic silica nanopowders was used to improve the fluidization quality of Ca(OH) 2 particles which belong to the Geldart C group and, thus, normally cannot be fluidized. Three parameters, i.e., sieved size of Ca(OH) 2 particles and sieved size and weight percentage of SiO 2 nanoparticles were selected for experiments. A direct proportionality was found between the coverage quality of materials over each other and the fluidization behavior of their corresponding adsorbents. Optimum SiO 2 size and concentration values were determined for the improvement of Ca(OH) 2 fluidizability. The sieved size of Ca(OH) 2 powder had no consequential effect on the coverage quality. The Richarson‐Zaki equation and fractal analysis combined with a modified Richardson‐Zaki approach were proposed for prediction of the fluidization quality and agglomerate size.