Engineering and Technology Journal

Abstract

The solid suspended-bubble columns with draught tube are widely used as a threephase
slurry reactor in industrial chemical process such as absorption, biochemical
reactions, coal liquefaction. etc. To design such a column the average gas holdup ( g e )
and the volumetric liquid-phase mass transfer coefficient (KLa) should be known. This
study includes the effect of gas velocity, liquid-phase properties, solid-particles
concentration and the static liquid height on both ( g e ) and (KLa). It was found that
both ( g e ) and (KLa) increase with increasing gas velocity and decrease with increasing
solid particles concentration, static liquid height, viscosity and surface tension of
liquid-phase.