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Simultaneous effect of particle size and solid concentration on the hydrodynamics of slurry bubble column reactors
Author(s) -
Lakhdissi El Mahdi,
Soleimani Iman,
Guy Christophe,
Chaouki Jamal
Publication year - 2020
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16813
Subject(s) - slurry , bubble , particle size , particle (ecology) , viscosity , work (physics) , bubble column reactor , chemistry , phase (matter) , mechanics , materials science , chromatography , thermodynamics , analytical chemistry (journal) , gas bubble , composite material , physics , oceanography , geology , organic chemistry
The simultaneous effect of particle size and concentration on the total gas holdup of slurry bubble column reactors was investigated in this work. The total gas holdup was measured for air–water–glass beads systems. Three solid concentrations and three particle diameters were used. It was found that increasing particle size at high constant concentration decreases gas holdup. Moreover, increasing solid concentration decreases gas holdup and this decreasing effect is higher for larger particles. Also, solid particles have two effects on hydrodynamics, namely, changing the viscosity and density of the liquid phase as well as hindering the bubbles from rising within the column by the collision phenomenon. Therefore, a novel correcting factor was introduced to correct the gas holdup. The hindering factor considers both the collision efficiency affected by the particle size as well as the solid concentration. A novel correlation was developed to predict the experimental data of the three‐phase gas holdup.