In conventional ethylbenzene dehydrogenation process, abundant superheated steam is consumed to supply reaction heat and inhibit coke formation, thereby a high operation cost is resulted. In this work, Fe₂O₃ promoted TiO₂-ZrO₂ catalyst demonstrated outstanding dehydrogenation performance in the absence of steam. The catalyst composition and preparation method have both been studied and optimized. The high specific surface area, well dispersion of Fe₂O₃ species, and appropriate acid-base properties are all necessary for ethylbenzene dehydrogenation. Ascribed to the reduction of Fe₂O₃ species, an induction period to reach the highest styrene selectivity was observed. For the catalyst after pre-reduction, an outstanding initial dehydrogenation performance can be obtained and kept stable in eight reaction-regeneration cycles. Further, a conceptual fluidized-bed ethylbenzene dehydrogenation process composed of a reactor, a regenerator and a reduction section was proposed to realize continuous reaction-regeneration operation. This work not only provides a class of ethylbenzene dehydrogenation catalyst efficient in the absence of steam, but also presents the concept of fluidized bed process obviously reducing the operation cost and achieving self-heat balance.

在常规的乙苯脱氢工艺中，消耗大量的过热蒸汽以提供反应热并抑制焦炭的形成，从而导致较高的运行成本。在这项工作中，Fe ₂ O ₃促进的TiO ₂ -ZrO ₂催化剂在没有蒸汽的情况下表现出出色的脱氢性能。研究和优化了催化剂的组成和制备方法。高比表面积，Fe ₂ O ₃物种的良好分散性以及适当的酸碱性质都是乙苯脱氢所必需的。归因于Fe ₂ O ₃的还原物种，观察到达到最高的苯乙烯选择性的诱导期。对于预还原后的催化剂，可以获得优异的初始脱氢性能，并在八个反应-再生循环中保持稳定。此外，提出了由反应器，再生器和还原段组成的概念性流化床乙苯脱氢方法，以实现连续的反应-再生操作。这项工作不仅提供了一类在没有蒸汽的情况下有效的乙苯脱氢催化剂，而且提出了流化床工艺的概念，明显降低了运行成本，实现了自热平衡。