Wetted wall column with a ternary liquid mixture

The phase equilibrium is described by the following approximate relations 

The diffusion process in each phase may be described by a film model. By applying the Maxwell-Stefan equations for each phase, the interfacial compositions and the rates of interface transport at the bottom of the column can be estimated using the following steps  

Step 1 From Eqs. (6.89) to (6.92), estimate the matrix of zero flux mass transfer coefficients for both the liquid and vapor phases at the interface [kx ] and [ky ]. Since the interface compositions are needed, first assume a value for xn. 

Step 2 For the first iteration, assume the matrix of correction factors [3PJ and [M, ] equal to the identity matrix [I], 

Step 3 Calculate the diffusion fluxes in each phase using Eq. (6.74). 

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Example 6.4 Wetted wall column with a ternary liquid mixture We have the experimental data on distillation of ethanol (1), feri-butanol (2), and water (3) in a wetted wall column reported by Krishna and Standard (1976). As Figure 6.2 shows, the column operates at total reflux with countercurrent flow. Therefore, at steady state, the compositions of the liquid and vapor phases at ary point in the column are equal to each other. The measured compositions of the phases at the bottom are... 

Example 6.4 Wetted wall column with a ternary liquid mixture... 

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