Abstract: Propane dehydrogenation (PDH) technology serves as a core process to meet the growing global demand for propylene and adapt to the trend of feedstock lightening. Platinum (Pt)-based catalysts, with their exceptional C—H bond activation capacity, play a vital role in industrial applications. However, under harsh operating conditions featuring high temperatures and frequent redox cycles, Pt-based catalysts suffer from multiple deactivation challenges including coke deposition, active metal sintering, and promoter leaching and migration, which restrict the operation cycle and economic performance of industrial units. This paper systematically reviews the deactivation pathways of Pt-based PDH catalysts, the factors affecting deactivation, and the coupling mechanisms of different deactivation routes. Design directions for industrial PDH catalysts are proposed from perspectives including atomic-level precise construction and support adaptation optimization, providing design guidelines for developing industrial PDH catalytic systems with longer service life, higher activity and superior stability.

Key words: propane dehydrogenation, Pt-based catalyst, deactivation mechanism, stability