Abstract
The studies described in this work are concerned with developing new experiments and analysis techniques in one- and two- dimensional nuclear magnetic resonance (NMR) to obtain unambiguous information about molecular motion in porous solids. The experiments yield data on the molecular dynamics and translational motion of a particular adsorbate in a single or multicomponent mixture and this information can then be incorporated into models of use in process design. A binary test system of acetone and water adsorbed in zeolite Y has been used to develop the techniques. The use of these methods is demonstrated by experiments which investigate the effect of various co-adsorbates on the motional properties of specific organics adsorbed in zeolitic structures. The approach has been extended to systems of industrial interest such as benzene adsorbed in silicalite. In this case, deuterium NMR experiments of benzene-d6 sorbed in silicalite reveal two discrete adsorption sites of differing adsorbate mobility corresponding to benzene preferentially adsorbed in mid-channel positions and molecules subsequently occupying channel intersections.
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