Process of producing alkenylaromatic compound using dehydrogenation catalyst

The invention relates to a process for the production of an alkenylaromatic compound comprising the step of: - contacting a hydrocarbon stream including an alkylaromatic compound with water vapor in the presence of a dehydrogenation catalyst, suitable for the dehydrogenation of the alkylaromatic compound, in one or more consecutive reactors, wherein the weight ratio between the water vapor and the hydrocarbon (water/hydrocarbon ratio) is from 0.4 to 1.5, wherein the dehydrogenation catalyst comprises three or more of teeth and a body, such that the cross-section of the dehydrogenation catalyst is a toothed-wheel shape, and wherein the dehydrogenation catalyst comprises, based on the total weight of the dehydrogenation catalyst components as oxides, - from 30 to 90 weight percent (wt. %) of iron calculated as Fe2O3, - from 1 to 50 wt. % of potassium calculated as K2O, - from 1 to 50 wt. % of cerium calculated as CeO2, and - from 0.01 to 1 wt. % of yttrium calculated as Y2O3. Further the invention relates to a