Application of zeugmatography to study kinetics of physical adsorption

Abstract

Spatial resolution of nuclear magnetic resonance signals may be achieved by use of magnetic field gradients. This new technique, called “zeugmatography”, has been applied in the present work to study dynamic processes, especially the kinetics of physical adsorption in microporous systems. The method provides information similar to the results of Dubinin's X-ray technique, but is not limited to X-ray contrast adsorbates. After a general discussion, examples of application of “dynamic zeugmatography” are given. Mass transfer for sorption of butane in NaCa A zeolites of different shape and of water in Na X zeolites could be observed directly.