Measurement of Local Phase Holdups in a Two- and Three-Phase Bubble Column

Review on the Effect of Gas Distributor on Flow Behavior and Reaction Performance of the Bubble/Slurry Reactors

“…The influence of the gas distributor is more important at low superficial gas velocities, e.g., U g = 0.02 m/s. ,− The effect of the gas distributor system on the shape of the gas holdup profiles was found to be reduced to an influence in the area of the gas inflow zone. Above this inflow zone, the shape of the phase holdup profiles was always parabolic, which was caused by the circulating liquid flow in the bubble column, even if the primary flow that was induced by the gassing system differed …”

“…Above this inflow zone, the shape of the phase holdup profiles was always parabolic, which was caused by the circulating liquid flow in the bubble column, even if the primary flow that was induced by the gassing system differed. 78 MacIntyre et al 79 studied the impact of distributor design (i.e., spider, regular perforated plate, conical perforated plate) on particle agglomeration in an SBCR with an internal diameter of 0.152 m at atmospheric pressure. The three distributors were constructed with the same number of openings and the same opening diameter to produce a similar gas holdup distribution.…”

CFD analysis of bubble column reactor under gas–oil–water–solid four-phase flows using Lagrangian algebraic slip mixture model

“…Therefore the higher concentration of the gas volume fraction appears in the middle regions of the column. The simulation results are coincident with the experimental findings of Dziallas et al (2000) in two-phase and three-phase flows of a bubble column at the radial profile of the distributions of the gas volume fraction which is with a holdup maximum in the center and a minimum at the wall. The water cut has slight effects on the distributions of the gas volume fraction.…”