Page 47 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
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(131)
where C G is the concentration of the gas phase, which is in equilibrium with
the bulk concentration of the liquid phase C L. The index " f stands for interface.
gas liquid
Fig. 7. Principle change of the absorption component concentrations on the two sides of the
interface in direction perpendicular to it.
The values of l/ko and \/k L determine the mass transfer resistance of
each phase. From equations (129) to (130) it follows;
(132)
where:
(133)
Because KG takes into account the mass transfer from both sides of the
interlace it is called overall mass transfer coefficient. From equations (127) and
(129) it can be easily obtained:
