Characteristics of Bubbles and Gas Holdup In A Two-Phase Column For Different Liquid Phases
Engineering and Technology Journal,
2007, Volume 25, Issue 0, Pages 282-290
AbstractExperimental study of gas holdup (Eg), bubble diameter (dvs) interfacial area
(a) m-1, small bubble rise velocity (Ubs), and bubble rise velocity (Ubr) in (0.1m
i.d) and (1.5m) high column operated at ambient temperature and pressure
conditions. The superficial gas velocity (Ug) was varied in the range of (0-0.3)
m/s, spanning both the homogenous and heterogeneous flow regimes. Air was
used as the gas phase.
Different liquids were used as liquid phase (Water, Ethanol, Butanol, paraffin
oil solutions ).
Experimental results shows that the influence of liquid properties on (Eg) is
considerable, where the lower surface tension (s ) gives a lower (Ubr) and
therefore a higher (Eg). High viscosity (mL
) leads to large bubbles and
therefore a low (Eg) and (a) , for coalescence liquids bubble diameter increases
with increasing gas velocity.
A correlation based on dimensionless groups for the predicition of (Eg) liquid
properties is proposed, and found to be in good agreement with the
- Article View: 62
- PDF Download: 18