GAS HOLDUP IN BUBBLE COLUMNS

Abstract

Usually gas holdup in a bubble column increases with gas feed rate, but sometimes it passes through a maximum. Though gas holdup is influenced by many factors, such as superficial gas velocity, physical properties of liquid, and the type of gas distributor1"5), the condition necessary for the appearance of maximumgas holdup remains obscure. It seems to be defined mainly by the properties of the gas distributor, but their effects on gas holdup have never been discussed in detail except by Freedman et al.2).