In membrane processes with two gas phases and a solid membrane, similar equations can be written for the case illustrated in Fig. 13.2-1b. The equilibrium relation between the solid and gas phases is given by
where S is the solubility of A in m3 (STP)/atm · m3 solid, as shown in Eq. (6.5-5), and H is the equilibrium relation in kg mol/m3 · atm. This is similar to Henry's law. The flux equations in each phase are as follows:
The permeability PM given previously is
The permeability ...