Exchange of Co(II) Ions in H-BEA Zeolites. Identification of Aluminium Pairs in the Zeolite Framework

0181237 - UFCH-W 20010152 RIV NL eng J - Journal Article
Bortnovsky, Oleg - Sobalík, Zdeněk - Wichterlová, Blanka
Exchange of Co(II) Ions in H-BEA Zeolites. Identification of Aluminium Pairs in the Zeolite Framework.
Microporous and Mesoporous Materials. Roč. 46, č. 2 (2001), s. 265-275. ISSN 1387-1811. E-ISSN 1873-3093
R&D Projects: GA AV ČR IBS4040015; GA MŠMT OC D15.20
Institutional research plan: CEZ:AV0Z4040901
Keywords : BEA zeolites * cobalt ion exchange * zeolite framework aluminium
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.497, year: 2001

The Co(II) ion exchange in NH4-, Hna- and H-BEA zeolites was employed to monitor framework Al pairs by quantitative analysis of IR spectra of OH groups and CđN groups of adsorbed d3-acetonitrile. Co(II) ions in dehydrated BEA zeolites, requiring two AlO2-framework groups for their charge balance, are at cationic sites which were occupied in parent zeolites by Na ions or by mutually interacting bridging protons or by those exhibiting high tendency to be dehydroxylated with formation of Lewis sites.
Permanent Link: http://hdl.handle.net/11104/0077821