Structure characterization and catalytic properties of Cr2O 3 doped with MgO supported on MgF2

Authors:

• J. Goslar,
• Maria Wojciechowska,
• Michał Arkadiusz Zieliński,
• Iwona Tomska-Foralewska,
• W. Przystajko

Abstract

A characterization of double oxide systems containing Cr₂O ₃ doped with MgO and supported on MgF₂ was carried out. The catalysts were prepared by impregnation and co-impregnation methods and characterized by the Brunauer-Emmett-Teller method, EPR, and temperature programmed reduction. The results proved the interactions between supported oxides and the presence of spinel-like phase after treatment at 400°C. Magnesium oxide clearly influences the catalytic activity as well as selectivity of chromium catalysts supported on MgF₂. The MgO-Cr ₂O₃/MgF₂ systems were active and selective in the reaction of CO oxidation at the room temperature and in the dehydrogenation of cyclohexene.