A KINETIC DESCRIPTION OF SORBATE MOTION IN ZEOLITES USING H-2 NMR

A model is presented to interpret the temperature dependence of motion al correlation time data derived from H-2 n.m.r. relaxation time exper iments of deuterated sorbed species within zeolites. In this work, a s tatistical description of intracage and intercage site-hopping process es is developed which relates the thermally activated jump processes o ccurring within the zeolites to the motional correlation times derived from the Lorentzian peak observed in H-2 n.m.r. studies. The model is applied to the interpretation of data acquired for the benzene-d(6)/H Y system before and after hydrothermal dealumination. (C) Elsevier Sci ence Inc. 1997