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Conference paper

2-DIMENSIONAL XE-129 EXCHANGE NMR MEASUREMENTS OF XENON DYNAMICS IN NA-A ZEOLITE

Two-dimensional (2D) exchange NMR is a powerful tool for measuring the dynamics and energetics of adsorbed xenon atoms undergoing slow exchange between the alpha-cages of Na-A zeolite. In this proceedings, we present recently published results, as well as additional discussion and data obtained, using 2D Xe-129 NMR to determine rate coefficients for intercage xenon hopping and to correlate them with adsorption and activation energies. Variable-temperature experiments establish the activation energy for hopping between alpha-cages to be 60+/-10 kJ/mol. The dependence of these kinetic and thermodynamic quantities on xenon occupancy of the alpha-cages reflects the importance of intracage interactions on the behavior of the adsorbed guest molecules.

    Note:

    10th International Zeolite Conference, GARMISCH PARTENKIR, GERMANY, JUL 17-22, 1994

    Reference

    • EPFL-CONF-204502

    Record created on 2015-01-08, modified on 2016-08-09

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