Computer modeling of column apparatuses: 1. Two-coordinate systems approach

The computermodeling of the mass transfer processes in column apparatuses on the basis of a new approach is presented. A convection-diffusion type model and an average concentration type model are used for solving the calculation problems in the cases of counter-current gas–liquid or liquid–liquid processes. In these conditions, the mass transfer process models are presented in two-coordinate systems, because in a one-coordinate system, one of the equations has no solution by the reason of the negative equation Laplacian value. A combination of iterative algorithms and MATLAB are used for the solutions of the equations set in different coordinate systems. As a result, it is shown, that the experimental data obtained from the column with real radius and small height are useful for the parameters identifications in the average concentration type models.