ADSORPTION OF NITROGEN, OXYGEN AND ARGON IN TRANSITION AND RARE EARTH ION EXCHANGED ZEOLITES A AND X

摘要

Adsorption of N_2, O_2 and Ar in zeolite A and X exchanged with silver, cerium and europium at 15 and 30°C temperatures has been studied. Silver exchanged zeolite A show higher adsorption capacity and selectivity for nitrogen compared to Zeolite CaA. Enhanced Nitrogen interactions of nitrogen molecules with AgA are also observed in very high heat of adsorption (38kJmol~(-1)). AgA also exhibits argon selectivity over oxygen atypical of zeolites. Both cerium and europium exchanged Zeolite X show oxygen selectivity over nitrogen in Henry region which has been attributed to interaction of oxygen with non-stoichiometric oxides of these cations apparently formed inside zeolites cavities.