ADSORPTION PHENOMENA AT HIGH-PRESSURES AND TEMPERATURES .4. ISOTHERMSOF EXCESS AND ABSOLUTE ADSORPTION OF KR ON NAA ZEOLITE

The problem of conversion of an isotherm of excess adsorption measured experimentally into values of the total amount of the adsorbate (abso lute adsorption) has been formulated. Five isotherms of excess adsorpt ion of krypton on NaA zeolite were measured (at 334--500 K) at equilib rium pressures of similar to 160 MPa. The corresponding isotherms of t he total amount were calculated and the temperature dependences of the parameters of an equation describing the isotherms of excess adsorpti on were identified, it was shown that al high temperatures and pressur es, krypton atoms diffuse into the beta-cavities of the NaA zeolite.