(544cr) Synthesis of Novel Hierarchically Porous ZSM-5-KIT-5 Materials and the Catalytic Performances for Hydrodenitrogenation of Quinoline

The novel
micro/mesoporous composite materials ZSM-5-KIT-5-x (ZK-x) were successfully
synthesized by the two-step hydrothermal crystallization method. And ZK-x were used as catalyst support to prepare the hydrodenitrogenation
(HDN) catalysts. The micro/mesoporous materials ZK-x and its corresponding
catalysts NiMo/ZK-x were characterized using XRD, FTIR, SEM, TEM, N₂-adsorption,
²⁷Al MAS NMR, Pyridine-FTIR, XPS and HRTEM techniques. The physic-chemical
properties of NiMo/ZK-x were compared with the reference catalysts with
different supports including zeolite ZSM-5, KIT-5. The characterization results
demonstrated that the textural and acidic properties of the ZK-x composite were
dramatically improved comparing with that of zeolite ZSM-5 and mesoporous silica
KIT-5. The performance of all the catalysts were evaluated in the
hydrodenitrogenation of quinoline, and the NiMo/ZK-3 exhibited the highest
catalytic activity comparing with other catalysts, which was ascribed to the
synergetic effects of open porous structure, excellent textural property,
appropriate acidity, and MoS₂ stacking morphology.

Keywords:
micro/mesoporous material; NiMo catalyst; HDN

Table 1. Structural parameters of ZK-x composite materials