| Popis: |
The contribution deals with the catalytic performance of vanadium-, cobalt- and nickel-based catalysts in oxidative dehydrogenation of ethane. Vanadium, cobalt and nickel species were loaded to microporous (MFI) and mesoporous (HMS) materials, and supported on inorganic support (alumina). The activity of catalysts was compared at 600 °C (9 % ethane and 2.5 % oxygen in helium, and W/F 0.12 g.s.cm −3 ). The most effective catalytic system was Ni−Al 2 O 3 , which also was tested at varied oxygen concentration, reaction temperature, and W/F. The most favorable set up corresponded to 46 % in the ethane conversion, 30 % in the ethene yield 30 %, and 0.91 g(C 2 =).g cat −1 .h −1 in the ethene productivity for Ni−Al 2 O 3 . The activity of Ni−Al 2 O 3 was stable for 6 hours in time-on-stream. |
