April 22, 2025
Propane dehydrogenation is an important way to produce propylene, and its core lies in the design and optimization of catalysts. Propylene is a key raw material in the petrochemical industry chain, and the market demand continues to grow. The traditional steam cracking process has problems such as high energy consumption and many by-products. The direct dehydrogenation of propane to propylene technology has attracted much attention due to its short process and single product. The performance of the catalyst directly affects the reaction conversion rate, selectivity and stability. The development of efficient and long-life catalysts has become the research focus in this field.
The commonly used propane dehydrogenation catalysts in industry can be divided into two major systems: platinum-based and chromium-based. Platinum-based catalysts are represented by Pt-Sn/Al₂O₃. The active component platinum is dispersed on the surface of the alumina carrier. Tin as an additive can inhibit the sintering of platinum particles and enhance the ability to resist carbon deposition. This type of catalyst has the characteristics of high low-temperature activity, and the reaction temperature is usually controlled at 500-650℃. Chromium-based catalysts are mainly Cr₂O₃/Al₂O₃. Chromium oxide combines with alumina through surface hydroxyl groups to form a monolayer dispersed structure, showing excellent selectivity at high temperatures of 600-700℃, but there are hexavalent environmental risks. In recent years, research hotspots have focused on the development of bimetallic catalysts, such as Pt-Ga and Pt-Zn systems, which regulate the adsorption strength of active sites through electronic effects and reduce the probability of side reactions.
PDH Alumina Carrier can well achieve the above reactions and safeguard the industrial production of propane.
