n - Hexane 개질반응을 위한 알루미나 담지 Pt - Re 이원 금속촉매의 활성도 , 선택도 및 안정성에 관한 연구 = Activity , Selectivity and Stability of Pt - Re Bimetallic Catalysts Supported on γ - alumina in n - Hexane Reforming Reaction

다국어 초록 (Multilingual Abstract)

The activities, selectivities and stabilities of bimetallic Pt-Re clusters supported on γ-alumina were evaluated in the n-hexane reforming reaction. Reaction temperature and calcination temperatures were varied at 300-500℃ and 400-500℃, respectively. Reduction was performed at 500℃ Pt-Re/alumina catalysts were prepared by coimpregnating the aqueous solution of H₂PtCl_6 and HReO₄. When the amount of Pt supported on alumina increased, the selectivity towards benzene increased, but the selectivity towards C_6 isomers decreased. Pt-Re/alumina was more active in the hydrogenolysis reaction at 400℃ than Pt/alumina, resulting in the higher selectivity towards C₁-C_5 compound. However, Pt-Re/alumina produced less C₁-C_5 compound and more benzene above 450℃ than Pt/alumina. The activities and selectivities of Pt-Re/alumina were varied with different calcination temperatures, indicating that the formation of Pt-Re bimetallic cluster is dependent on the calcination temperature. The addition of Re on Pt improved the maintenance of activity by decreasing the deactivation rate.