Hydrocracking diversity in n-dodecane isomerization on Pt/ZSM-22 and Pt/ZSM-23 catalysts and their catalytic performance for hydrodewaxing of lube base oil
Shanbin Gao, Zhen Zhao, Xuefeng Lu, Kebin Chi, Aijun Duan, Yanfeng Liu, Xiang‐Bin Meng, Mingwei Tan, Hong-Yue Yu, Yuge Shen, Mengchen Li
Abstract
Abstract Nobel metallic Pt/ZSM-22 and Pt/ZSM-23 catalysts were prepared for hydroisomerization of normal dodecane and hydrodewaxing of heavy waxy lube base oil. The hydroisomerization performance of n-dodecane indicated that the Pt/ZSM-23 catalyst preferred to crack the C–C bond near the middle of n -dodecane chain, while the Pt/ZSM-22 catalyst was favorable for breaking the carbon chain near the end of n -dodecane. As a result, more than 2% of light products (gas plus naphtha) and 3% more of heavy lube base oil with low-pour point and high viscosity index were produced on Pt/ZSM-22 than those on Pt/ZSM-23 while using the heavy waxy vacuum distillate oil as feedstock.