Abstract: The solid super acid catalyst Pt/SZA was prepared by the equal volume impregnation method. The effects of calcination temperature on the crystal phase, pore structure and acidity of the catalyst were characterized by XRD, nitrogen adsorption and desorption, NH₃-TPD and other methods. The effect of calcination temperature and sulfur loading of the super acid support on the isomerization performance of the catalyst were also investigated. The results showed that the optimum calcination temperature was 550 ℃ and the sulfur content of the catalyst was 3.15%. Under this condition, the prepared Pt/SZA catalyst exhibited little monoclinic zirconia, more active sites of acid centers and suitable pore structure properties. The catalyst had the highest catalytic activity for the isomerization of n-hexane and excellent distribution of isomerization product distribution in the same reaction condition.

Key words: calcination temperature, super acid, catalyst, n-hexane, isomerization