Preparation of Beta-KIT-5 composite material supported ternary metal catalyst and its hydrodenitrogenation performance of quinoline

A series of Beta-KIT-5 (BK-x) composite materials with different Si/Al ratios were synthesized successfully with the nano-assembly method, and NiMoW catalysts were prepared for quinoline hydrodenitrogenation (HDN) reaction. The characterization results showed that BK composite materials possessed the ordered three-dimensional face-centered-cubic mesoporous structure and Beta topological structure; moreover the Beta structure units were embedded into the framework of KIT-5 material. The addition of Beta seed solution modified the textural properties and interaction between the support and active metals, thus improving the distribution of active metal species and enhancing the acidity of NiMoW catalysts, especially for Brønsted acid sites. The catalytic performance displayed that the NiMoW/BK-3 catalyst exhibited the highest HDN efficiency and maximum kHDN (21.6×10−5 mol g−1h−1), which was attributed to the excellent structural properties, moderate acid sites and suitable dispersion of Mo(W)S2 stacking slabs.