Equations of working lines in packed columns with regard to longitudinal diffusion

The analysis of differential equations of material balance with mass transfer taking into account longitudinal diffusion on both phases in a packed absorber and a distillation column is carried out. It is proposed according to the known algorithms for the calculation of absorption processes to calculate the working lines separately for two cases: 1) solid phase moves in the mode with longitudinal diffusion and dispersion in the ideal displacement mode; 2) continuous phase moves in the ideal displacement mode and dispersion mode with longitudinal diffusion, and then by summing the ordinates of the resulting working lines, to its overall significance to him and the equilibrium line on a standard methodology to calculate the height and diameter of the column.