Abstract: An ethylbenzene dehydrogenation catalyst, a preparation method therefor, and the use thereof are provided. The catalyst includes Fe2O3, K2O, CeO2, MoO3 and CaO. The exposed crystal face area of CeO2 (100) accounts for 60% or more of the total exposed crystal face area of CeO2. The catalyst is used in a reaction for preparing styrene by means of dehydrogenating ethylbenzene at a low water ratio, and has high activity and stability.

Abstract: An iron-potassium-cerium-based composite oxide catalyst, its preparation and application thereof are provided. The catalyst has metal elements Fe, K and Ce, as well as a metal element M that is at least one selected from the group consisting of Group IIA metal elements, Group VIB metal elements other than Cr and Group IVA metal elements. The catalyst has a total alkali content of 0.32-0.46 mmol/g, and a strong alkali content of 0.061-0.082 mmol/g. When used for dehydrogenation of alkyl aromatics, the catalyst shows high selectivity, high catalytic activity and high stability, provides less by-products, and has the characteristics of low material consumption and low power consumption, even at a low dehydrogenation temperature and an ultralow steam-to-oil ratio.