PREPARATION OF A DENSE ZSM-5 ZEOLITE FILM ON THE OUTER SURFACE OF AN ALUMINA CERAMIC FILTER

Citation
T. Masuda et al., PREPARATION OF A DENSE ZSM-5 ZEOLITE FILM ON THE OUTER SURFACE OF AN ALUMINA CERAMIC FILTER, Applied catalysis. A, General, 111(2), 1994, pp. 143-150
Citations number
11
Categorie Soggetti
Chemistry Physical","Environmental Sciences
ISSN journal
0926860X
Volume
111
Issue
2
Year of publication
1994
Pages
143 - 150
Database
ISI
SICI code
0926-860X(1994)111:2<143:POADZZ>2.0.ZU;2-D
Abstract
Thin films of ZSM-5 zeolite were prepared on the outer surface of an a lumina ceramic filter by hydrothermal synthesis at 473 K. Their struct ure and atomic composition were shown to be the same as those of the c orresponding original zeolite using several spectrometric methods: X-r ay diffraction, Si-29 magic angle spinning nuclear magnetic resonance and electron probe microanalysis. The acidic properties of the membran e were evaluated using the conventional temperature-programmed desorpt ion spectrum of ammonia. The morphology and thickness of the zeolite f ilm were dependent on the silica source. Water glass is typically used as the silica source in the preparation of powdery ZSM-5 zeolite. A d ense zeolite film could be prepared using Na2SiO3 as the silica source , but could not be obtained using water glass as the silica source.