IRINA PINCOVSCHI, CRISTINA MODROGAN THE DETERMINATION OF MASS TRANSFER CHARACTERISTICS OF A COLUMN FOR SULPHUR DIOXIDE ADSORPTION IN 13 X ZEOLITE WORKING IN UNSTEADY-STATE REGIME In the present work, the mass transfer characteristics such as the lenght of mass transfer unit (LMTU), the break through time and column saturation time have been studied in the case of sulphur dioxide adsorption on 13 X zeolite. The adsorption column was working in unsteady-state conditions. For these determinations a chromatographic method has been used, permiting the direct inregistration of breakthrough curves, whose shape depends on adsorption conditions (gas concentration, temperature, the size of adsorbent grains, gas velocity). The method is very sensitive, reflecting all changes of adsorption parameters.
Keywords: zeolites; adsorption in unsteady-states regime; mass transfer unit; breakthrough curves