Abstract: The present article compares propane dehydrogenation performances of alumina binder-added PtSnNa/AlSBA-15 catalysts prepared via three different procedures with the performance of a PtSnNa/AlSBA-15 catalyst without binder. All these catalysts have been investigated by reaction tests and some physicochemical characterizations such as BET, H2 chemisorption, catalytic grain intensity, NH3-TPD and TPO. Results showed that the addition of alumina binder can enhance the mechanical strength of catalyst evidently. Moreover, different preparation procedures not only modified the characteristics of both acid and metal function but also affected the coke deposition on the catalysts. Among these catalysts studied, the catalyst prepared by impregnation followed by the agglomeration of alumina binder, exhibited the highest catalytic activity and stability compared with others undergoing different preparation procedures. The possible reason may attribute to the highest metallic dispersion and the strong interactions among Pt,Sn and the support.

Key words: AlSBA-15, binder, preparation procedure, propane dehydrogenation, alumina.