Abstract ▼ AI-Helper

As important basic compounds in the petrochemical industry, olefins have been produced mainly by naphtha cracking process. However, since the recent oil price increase and growing demand for specific olefins, olefin synthesis processes from is gain interest to replace olefins such as ethylene and pr...

As important basic compounds in the petrochemical industry, olefins have been produced mainly by naphtha cracking process. However, since the recent oil price increase and growing demand for specific olefins, olefin synthesis processes from is gain interest to replace olefins such as ethylene and propylene obtained from naphtha to produce alternative paraffins. Among these, as an important raw material, propylene’s value is steadily increasing along with propylene and ethylene. For this reason, many industries have an interest in producing propylene through dehydrogenation of propane. In the dehydrogenation reaction, PtSn alloy catalyst is known have high activity and stability from its electric and geometric form. In this research, propane dehydrogenation reaction was performed under reaction temperatures 848 K ~ 923 K and atmospheric pressure. Pt/θ-Al2O3 catalyst was used as the catalyst, Sn and K were used to improve activation performance of platinum catalyst. Also, by using various solvents, the solvent effect on the activation performance was studied. Catalyst was synthesized with impregnation method. Cracking sites of Pt was noticeably decreased with addition of Sn and the decrease cracking products improving the selectivity of propylene was observed, whereby suppressing the deactivation of the catalyst. Also, in the case where K was added the acid site was decreased and the decrease in the selectivity for isomerization reactions was confirmed. Optimal Sn and K composition was obtained for the optimization of the reaction. The physical and chemical surface properties were analyzed with BET analysis, TPR, CO hemisorption, and XRD. The effect of Sn and K concentration effect was interpreted by correlating the catalyst activity with catalyst property analysis.

Keyword