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The present article compares the propane dehydrogenation performance of alumina binder-added PtSnNa/ AlSBA-15 catalysts prepared via three different procedures in comparison with the performance of a binder-free PtSnNa/AlSBA-15 catalyst. All these catalysts have been investigated by reaction tests and some physico-chemical characterizations such as BET, H2 chemisorption, catalytic grain crushing strength, NH3-TPD and TPO analyses. Test results showed that the addition of alumina binder could enhance the mechanical strength of catalyst evidently. Moreover, the different preparation procedures not only modified the characteristics of both acid and metal functions 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 had exhibited the highest catalytic activity and stability compared with other catalyst samples undergoing different preparation procedures. The possible reason may be attributed to the highest metallic dispersion and the strong interactions among Pt, Sn and the support.
The present article compares the propane dehydrogenation performance of alumina binder-added PtSnNa / AlSBA-15 catalysts prepared via three different procedures in comparison with the performance of a binder-free PtSnNa / AlSBA-15 catalyst. All these catalysts have been investigated by reaction tests and some physico-chemical characterizations such as BET, H2 chemisorption, catalytic grain crushing strength, NH3-TPD and TPO analyzes. Moreover, the different preparation procedures not only modified the characteristics of both acid and metal functions 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 had exhibited the highest catalytic activity and stability compared with other catalyst samples undergoing different preparation procedures. The possible rea son may be attributed to the highest metallic dispersion and the strong interactions among Pt, Sn and the support.