OPTIMUM LIQUID AND SOLID-PHASE VELOCITY FOR MINIMUM SHOCK LAYER THICKNESS IN COUNTER-CURRENT CHROMATOGRAPHY

摘要

The shock-layer theory is applied to counter-current liquid chromatography, in the single-component case. This model uses a Langmuir isotherm to account for nonlinear effects, a finite axial dispersion coefficient and a linear driving force (LDF) kinetics to account for the nonideal effects, e.g., the axial dispersion and the mass transfer resistance. The shock-layer velocity and its thickness are explicitly formulated in closed forms. Based on these expressions, the optimum velocities of the solid and liquid phases are derived for minimum shock-layer thickness.