Mathematical Modeling of CO2 and SO2 Adsorption in a Packed Column from Flue Gases of TPS

A physico-mathematical model of gas adsorption in a packed column (PC) has been built. Analysis of the results of some experimental studies has shown that in most practical cases of extraction of target components from the vapor-gas flow at the interface (on the surface of the adsorbent granules), Henry's phase equivalence can be approximated with a linear law. Calculations have been performed for the experiment isotherm of nitrogen adsorption onto aluminosilicate in the region of its linear part at low concentrations of the adsorbate in the adsorbent; Henry's constants for CO2 at adsorption onto aluminosilicate have been found for three temperatures (30, 55, and 75 degrees C) in accordance with the known experimental data. A parametric analysis has been performed with respect to the CO2 adsorption process in a PC against the packed bed height, size of adsorbent granules, and rate of filtration of the vapor-gas flow through the packed bed. Estimations have been made for SO2 adsorption onto aluminosilicate in a PC; some practical recommendations have been given for using the results presented in the article, as well as on the need to continue systematic comprehensive theoretical and experimental study of the adsorption process in a PC to establish the dependence of the phase equilibrium constants on the temperature and concentration of water vapor in gases for certain target gas component-adsorbent pairs.