Preparation of spherical alumina support for propane dehydrogenation catalyst by extrusion-spheronization technique in laboratory & bench scale

The main goal and issue in this article is to achieve the formulation and shaping of spherical alumina as a catalyst support for propane dehydrogenation. Propane dehydrogenation and propylene production are essential requirements for Iran, recognized as a catalytic process. The catalyst carrier is spherical alumina with a specific morphology, impregnated with platinum, tin, and potassium promoter to produce the propane dehydrogenation catalyst. Using the extrusion-spheronization technique for creating spherical alumina catalyst supports is innovative compared to traditional methods (oil-drop and oil-ammonia) for shaping spherical alumina supports. This method eliminates the need for washing, using hot oil or ammonia. The product is spheronized directly after extrusion, allowing for the production of spherical alumina sizes from ۱ to ۴ mm. Unlike granulation methods, layer-by-layer formation is not used; instead, various pore-forming agents can create meso-, micro-, and even macro-pores in the spherical base after thermal treatment. By designing appropriate experiments, receiving feedback from identity analyses, catalyst construction, reactor testing was carried out to modify formulations. Optimized drying and calcination stages were improved by identifying catalyst supports through analysis. These stages are part of a cyclical process to ensure overall coordination among components. In this method of producing alumina, using alumina as the catalyst base reduces the number of work stages. By implementing it on a pilot scale, energy efficiency increases by ۸۰% compared to existing methods. There are fewer work stages, minimal process waste, production speed is significantly higher with low pollution

کلیدواژه ها:

Spherical alumina ، Extrusion-spheronization method ، Catalyst support ، Dehydrogenation ، Propane