Study of molecular mobility of fluid in zeolite NaX

The self-diffusion of n-decane in zeolite NaX was studied by NMR PFG method . The situation when the liquid was only in the crystalline channels was st udied in details. The restricted molecular motion of liquid in the crystall ine channels was observed. The reasons of the anomalous self-diffusion of n -decane in zeolite bed were stated. The technique of the determination of t he genuine self-diffusion coefficient in such porous systems was proposed. The genuine self-diffusion coefficients for system NaX/n-decane were obtain ed. (C) 2001 Elsevier Science inc. All rights reserved.