Theoretical Description and Simulation of the Hydrodynamics and Porous Layer Structure during Mass Transfer in an Adsorption Apparatus with Ion-exchange Resins

Abstract

This work is a part of the project for investigations of hydrodynamics and mass transfer in an adsorption apparatus with ion-exchange resins during the extraction of stevioside from stevia extract. Nowadays the issues of improving the structural-sorption characteristics while increasing selectivity to certain substances, expanding the range, simplifying the manufacturing technology and reducing the cost of production of industrial adsorbents are extremely relevant. The submitted work is devoted to mathematical modeling and a theoretical description of adsorption in the layer of expanded ion-exchange resins. By this, the main aspects of adsorption in a layer of porous material have been considered, and a model of the geometric structure of the adsorption layer has been developed. The original contribution of the work and its scientific novelty lie in the fact that a mathematical model of the evolution of a two-component dispersed phase has been developed and qualitatively analyzed taking into account competitive adsorption and the non-equilibrium nature of mass transfer between the adsorption surface of the porous material and the dispersed phase. The results and conclusions of the work are recommended to be used in planning and conducting research work in the field of intensification of heat and mass transfer processes and engineering design of adsorption chemical apparatuses and adsorption columns.