Zobrazit minimální záznam
dc.contributor.author |
Fuchsová, Janal|Bulánek, Romanl|Novoveská, Kateřinal|Čermák, Davidl|Lochař, Václav
|
|
dc.date.accessioned |
2009-03-12T16:11:19Z |
|
dc.date.available |
2009-03-12T16:11:19Z |
|
dc.date.issued |
2003 |
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dc.identifier |
Univerzitní knihovna (studovna) |
cze |
dc.identifier.issn |
1211-5541 |
|
dc.identifier.uri |
http://hdl.handle.net/10195/32672 |
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dc.description.abstract |
Ga-zeolites of MFI and BEA topology were prepared by three different methods: conventional ion exchange of gallium ions from solution of gallium salt, reductive solid state reaction of gallium oxide with H-form of zeolite, and interaction of GaCl3 with H-form of zeolite. They were characterized by XRD, XRF, H2-TPR, FTIR, the adsorption of pyridine and d3-acetonitrile. The catalytic activity of Gazeolites was studied in plug-flow reactor in a steady state at atmospheric pressure. XRD and TPR evidence shows the presence of at leats three kinds of species: a) (GaO)+ in the cationic sites; b) gallium is in the form of bulk oxide; c) Ga3+ ions. The number of Lewis sites increases as the Broensted sites decrease upon introduction of Ga ion. (GaO)+ ions are the easiest reducible and exhibit the highest catalytic activity in ammoxidation of propane to acrylonitrile. |
eng |
dc.format |
s. 137 - 150 |
cze |
dc.language.iso |
eng |
|
dc.publisher |
Univerzita Pardubice |
cze |
dc.relation.ispartof |
Scientific papers of the University of Pardubice. Series A, Faculty of Chemical technology. 8 (2002) |
eng |
dc.rights |
open access |
eng |
dc.subject |
galium |
cze |
dc.subject |
zeolity |
cze |
dc.subject |
katalytická aktivita |
cze |
dc.subject |
katalytické procesy |
cze |
dc.title |
On the incorporation of gallium ions into a cationic sites of pentasil ring zeolites and their acid-base, redox and catalytic properties |
eng |
dc.type |
article |
cze |
dc.identifier.signature |
47333 |
|
dc.peerreviewed |
yes |
eng |
dc.publicationstatus |
published |
eng |
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