Effect of Thermal Treatment of the Al3O3 and TiO2 supports on Properties of Dispersed Chromium Oxide in Oxidative Dehydrogenation of Isobutane

• Autorzy: Grzybowska B. , Samson K. , Keromnes L. , Wcisło K. , Duła R. , Serwicka E. M.
• Języki publikacji: EN

Abstrakty

EN

Chromium oxide has been dispersed on Al2O3 and TiO2 supports, heated between 500-1200 C, and the catalysts obtained have been tested in oxidative dehydrogenation of isobutane at 280 C. For the CrOx/Al2O3 system the thermal treatment of alumina, which leads to the decrease in the specific surface area and polymorphic transformations of the initial -Al2O3 into , and modifications, does not affect the catalytic performance of the catalysts in the reaction under study. On the other hand, the transformation of anatase-TiO2 into rutile-TiO2, occurring on heating at 1000 C, leads to catalysts of a higher activity and selectivity to isobutene. Amelioration of the catalytic properties for CrOx/rutile-TiO2, as compared with CrOx/anatase-TiO2 catalysts, has been ascribed to changes in the structure of the CrOx active centres, evidenced by ESR.

Słowa kluczowe

EN

supported chromium oxide catalysts; alumina supported chromium oxide; oxidative dehydrogenation of isobutane

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 2
• Strony: 283--292
• Opis fizyczny: Bibliogr. 33 poz., rys.

Twórcy

autor

Grzybowska B.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

autor

Samson K.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

autor

Keromnes L.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

autor

Wcisło K.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

autor

Duła R.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

autor

Serwicka E. M.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek, 30-239 Kraków, Poland

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