Stability of Activity of Gallium- and Zinc-Containing Zeolite Catalysts in the Process of Propane Oxidative Dehydrogenation with CO2

What is it about?

The investigation results on the stability of the activity and selectivity of Ga- and Zn-containing catalysts based on BEA zeolite in the oxidative dehydrogenation of propane with CO2 have been analyzed. According to XRD, nitrogen adsorption/desorption, and Raman spectroscopy data, it is established that the change in the activity/selectivity of the catalysts during 10 h of operation results from surface carbonization involving Brønsted acid sites. After regeneration in the temperature-programmed oxidative mode (20% O2 + 80% He, 650°C), the catalysts’ activity is restored.

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