Abstract:
Aromatization is one of the most important industrial processe for the production of intermediate aromatics. Since bifunctional catalysts such as Pt/Al2O3 give poor selectivity to aromatics, monofunctional catalysts such as Pt/KBeta, Pt/KL, Pt/KOmega, PtKY and Pt/SiO2 were studied. These catalysts were chosen because they lack acid sites which can cause undesirable side reactions. Pt/KL is known to be an effective catalyst for n-hexane aromatization. However, it has much lower catalytic activity when used for n-octane aromatization. The objectives of this work were to study the effects of various suppots such as Beta, L, Omega and Y zeolites, and SiO2, and determine the optimum amount of Pt loading in the range of 0.5-1.5% for n-octane aromatization. The catalysts were prepared by the vapor-phase impregnation method. The catalytic performances of such catalysts on n-octane aromatization were investigated. It was found that 1%Pt/KL and 1%pt/SiO2 showed somewhat higher catalytic performance in both conversion and selectivity.
