Composite of Pt/AlSBA-15+zeolite catalyst for the hydroisomerization of n-hexadecane: The effect of platinum precursor

In this study, the Pt (0.5 wt%) catalysts supported on the bimodal composite materials consisting of AlSBA-15 and BEA zeolite, were prepared using three different precursors of Pt, i.e. H2PtCl6, Pt(NH3)4(NO3)2 and Pt(NH3)4Cl2. The obtained catalysts were characterized by means of N2 sorption, XRD, Py–FTIR, FTIR, H2 chemisorption and TEM to determine the effect of the Pt precursor on their physicochemical properties. Catalytic performance of obtained catalysts was investigated in hydroisomerization of n-hexadecane. It was found, that the Pt precursor had significant impact on catalytic activity and selectivity. The results of n-hexadecane hydroconversion showed that the catalyst obtained with Pt(NH3)4(NO3)2 provided the highest yield of the most desired high-cetane number products. In addition, it had the lowest selectivity to cracking products, which are undesirable in hydroconversion of long-chain alkanes.