Collect. Czech. Chem. Commun. 1992, 57, 733-738

Study of Coke Distribution in HZSM-5 by 129-Xe NMR

Jean L. Bonardeta, M. C. Barragea, Jack P. Fraissarda, Ludmila Kubelkováb, Jana Novákováb, Horst Ernstc and Dieter Freudec

a Laboratoire de Chimie de Surfaces, Universite P. et M. Curie, Paris France
b J. Heyrovský Institute of Physical Chemistry and Electrochemistry, 182 23 Prague 8, Czechoslovakia
c Sektion Physik der Universität Leipzig, Germany


The location of coke formed during conversion of methanol or acetone on HZSM-5 zeolites has been examined using 129-Xe NMR spectroscopy. The results show that the type of reaction and the method of regeneration have great importance for the location of carbonaceous residues inside or outside the zeolite framework.