FT-IR Spectroscopic Studies of NH4ReO4 Supported on Inorganic Gels

• Autorzy: Kirszensztejn P. , Wachowski L. , Zawadzki J. , Skupiński W.
• Języki publikacji: EN

Abstrakty

EN

Results of IR study of the systems NH4ReO4/Al2O3 and NH4ReO4/Al2O3-SiO2 heated in the range 293-723 K are given. The systems contained rhenium in amounts corresponding to those in typical heterogeneous catalysts of olefin metathesis. The IR absorption spectra, recorded for the wavelengths 1700-1300 cm-1, enabled detection of adsorption at the Brönsted and Lewis type acid centres of water and ammonia, released during thermal decomposition of ammonium perrhenate. The spectra indicated a similarity between the adsorption centres present on the surface of the systems 17.8 wt.% NH4ReO4/Al2O3 and 3.3 wt.% NH4ReO4/Al2O3-SiO2 and those on the surface of the systems 3.3 and 9.9 wt.% NH4ReO4/Al2O3. The presence of adsorption centres in the former systems should be related to the phase of the surface rhenium species, while in the latter the centres occur on the surface of the support.

Słowa kluczowe

EN

heterogeneous rhenium catalyst; FTIR

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2002
• Tom: Vol. 76 / nr 11
• Strony: 1625--1636
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Kirszensztejn P.

• Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, Pl-60-780, Poznań, Poland

autor

Wachowski L.

• Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, Pl-60-780, Poznań, Poland

autor

Zawadzki J.

• Facuity of Chemistry, Warsaw University of Technology, Noakowskiego 3, Pl-00-664 Warsaw, Poland

autor

Skupiński W.

• Facuity of Chemistry, Warsaw University of Technology, Noakowskiego 3, Pl-00-664 Warsaw, Poland

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