A Pt/SAPO-11 dual functional catalyst was prepared from hydrothermally synthesized SAPO-11 molecular sieve and used to study hydroisomerization of n-C8

n-C12 and n-C16 alkanes. Results indicated that this catalyst had good isomerization activity and high selectivity as a result of appropriate acid center and hierarchical pore distribution. Yields for monomethyl-branched isomers and total branched isomers

ideal components for low freezing point diesel and high-grade lubricant

were above 60% and 75% respectively. The distribution of isomerization products was almost the same for n-alkanes of different chain lengths

which monomethyl-branched isomers were about 75% of total isomerization products and 40% were monomethyl-branched isomers with methyl group at middle chain. Isomerization and hydrocracking reactions were more likely to occur on longer chain n-alkanes. Under the same conversion

long-chain n-alkanes showed increase in hydrocracking but decrease in isomerization selectivity.