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1 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1 2002

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Mg-Al hydrotalcite modified with V3+ and/or V5+ cations as precursors of catalysts for oxidative.

Węgrzyn A., Kuśtrowski P., Rafalska-Łasocha A., Dziembaj R.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

2002

Vol. 10, nr 57

253-258

The chemical composition of Mg-Al hydrotalcite was modified either by introduction of V3+ cations into the brucite-like sheets of double layered hydroxide or by exchange of the interlayer NO3- and CO32- anions with polyoxovanadate species. Pyrovanadate (V2O74-) and decavanadate (V10O286-) intercalated into Mg-Al hydrotalcite were obtained from the parent aqueous NH4VO3 solution by adjustment of pH to the value of 9.5 or 4.5, respectively. All the as-synthesized samples were characterized with respect to their structure by powder x-ray diffraction and IR spectroscopy. The calcined materials were used as catalysts in oxidative dehydrogenation of iso-butane performed in the excess of oxygen.