Catalysts for the production of styrene from ethylbenzene: Redox and deactivation study
2013
Irún, O. | Sadosche, S.-A. | Lasobras, J. | Soler, J. | Francés, E. | Herguido, J. | Menéndez, M.
In this work, a pulse plant has been used to study the redox properties, activity and coke generation of four catalysts in ethylbenzene dehydrogenation to produce styrene. CO₂ was used as weak oxidant. A physicochemical and structural characterization was carried out in order to verify possible changes in the catalysts after the tests. The experiments consisted of a reduction test with H₂, oxidation with CO₂, reaction with ethylbenzene, regeneration with CO₂ and coke combustion and reoxidation with O₂. These experiments were carried out at three temperatures (450, 500 and 550°C). With the catalyst that exhibited the best results, MnO₂–ZrO₂, additional experiments with different oxidation states were carried out in order to determine the influence on its activity and redox properties to assess the feasibility of using CO₂ as a regenerating agent during the ethylbenzene dehydrogenation reaction.
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