Tuning the Structure and Acidity of Pt/Hierarchical SSZ-32 Catalysts to Boost the Selective Hydroisomerization of n-Hexadecane

Developing highly selective and efficient bifunctional catalysts is an important issue for the hydroisomerization of long-chain n-alkanes. It vital to tailor balance isomerization cracking reactions in hydroisomerization. Herein, a Pt/hierarchical SSZ-32 catalyst was fabricated with sequential desilication–dealumination treatment boost n-hexadecane (C16). The pore structure acid sites zeolite were tailored. More mesopore Brønsted generated, ratio weak strong acidity (Bw/Bs) increased by desilication–dealumination. generated hierarchical had little effect on selectivity reaction pathways versus cracking. isomers/cracking products almost linearly increase Bw/Bs ratios. Meanwhile, synergetic regulation promoted monobranched i-C16 products. Therefore, resulting Pt/SSZ-0.6AS exhibited highest activity total isomer yield 71.5% at 255 °C enhanced formation mechanism isomers occurred via mouth.