Page 42 - Packed bed columns for absorption, desorption, rectification and direct heat transfer
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p A=He.X A, (113)
where p A is the equilibrium partial pressure of the absorbed component A,
X A - concentration of this component in the liquid phase in kmol absorbed gas
per kmol liquid and He is the so called Henry constant.
Taking into account that
Y A=p A/P, (114)
where Y* A is the equilibrium concentration in the gas phase in kmol/kmol, and
P- the pressure, from Eq. (110) it can be obtained:
Y A=mjf A, (115)
where m = He IP is the equilibrium constant of the process.
Because the concentration of the phases can be expressed in different
ways, the equilibrium constant depending on this expression is also different for
the same system, pressure, and temperature. For example if the concentrations
3
in both phases are in kg/m the respective equilibrium constant m c is
(116)
3
If C G and C L are in kmol/m , it is
It is easy to find that the dependence between the different equilibrium
constants is as follows:
