29Si MAS-NMR STUDIES ON DEALUMINATION OF MORDENITE

29Si MAS-NMR STUDIES ON DEALUMINATION OF MORDENITE

A series of different H-mordenites from acid leaching and steam calcination have beenmeasured with 29Si NMR. Through analysis of these solid-state 29Si NMR spectra, theresults related to dealumination process of mordenite are obtained. It is shown that mor-denite is combined by four kinds of non-equ...

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Veröffentlicht in:中国科学：化学英文版 1989 (9), p.1035-1043
1. Verfasser: 薛志元 戴林森 李全芝 张红浪
Format: Artikel
Sprache:eng
Schlagworte:
29Si
dealumination
MAS-NMR
mordenite
order
spectra
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Zusammenfassung:A series of different H-mordenites from acid leaching and steam calcination have beenmeasured with 29Si NMR. Through analysis of these solid-state 29Si NMR spectra, theresults related to dealumination process of mordenite are obtained. It is shown that mor-denite is combined by four kinds of non-equivalent Si （or Al） via oxygen bridges. The deal-umination order is T（1）, T（2）, T（4） and T（3）. The dealuminated amount in the non-equivalentsites during different dealumination processes has also been discussed in detail.
ISSN:1674-7291
1869-1870