H2-D2 exchange and migration of Ga in H-ZSM5 and H-MOR zeolites

M. Garcia Sanchez, P.C.M.M. Magusin, E.J.M. Hensen, R.A. Santen, van

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)


Trimethylgallium (TMGa) was loaded by chem. vapor deposition (CVD) on two different zeolites, H-ZSM5 and H-MOR. The interaction of TMGa on zeolite acid sites and the effect of redn. and oxidn. treatments were characterized by ICP, XPS, FT-IR and 71Ga NMR. The capacity of dissociatively adsorption of H2 and D2 and the resultant HD desorption was analyzed by H2-D2 exchange reaction. The oxidn. and specially the redn. treatment provoke the migration and redistribution thought zeolite crystals. FT-IR results show that TMGa reacts with both silanol and sterically accessible Bronsted acid sites. 71Ga NMR spectra show that Ga is presents in two different geometries: octahedral and Ga compensating the neg. charged Al from the framework zeolite structure. Hydrogen pretreatment of both zeolites has a pos. effect on the distribution of Ga. However, Ga species obtained were less active for H2-D2 exchange than the Ga species obtained after oxidn.
Originele taal-2Engels
TitelImpact of zeolites and other porous materials on the new technologies at the beginning of the new millennium : proceedings of the 2nd International FEZA (Federation of the European Zeolite Associations) conference, Taormina, Italy, September 1 - 5, 2002
RedacteurenR. Aiello, F. Testo, G. Giordano
Plaats van productieAmsterdam
ISBN van geprinte versie0-444-51174-1
StatusGepubliceerd - 2002
Evenementconference; International FEZA conference ; 2 (Taormina) : 2002.09.01-05; 2002-09-01; 2002-09-05 -
Duur: 1 sep. 20025 sep. 2002

Publicatie series

NaamStudies in Surface Science and Catalysis
ISSN van geprinte versie0167-2991


Congresconference; International FEZA conference ; 2 (Taormina) : 2002.09.01-05; 2002-09-01; 2002-09-05
AnderInternational FEZA conference ; 2 (Taormina) : 2002.09.01-05


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