Related Experiment Video
Updated: Jun 16, 2026

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
Published on: August 17, 2019
Supported Nickel Molybdenum Sulfide Hydrocracking Catalysts Profit From Increased Proximity Between Acid and Metal
Ping Yang1, Mingfeng Li1, Weili Dai2
1Research Institute of Petroleum Processing, SINOPEC, Beijing, P. R. China.
Abstract:
Mo-modified HY zeolite-alumina composites, featuring closely adjacent metal and acid sites, were rationally designed as supports for the preparation of NiMo-catalysts. These catalysts demonstrate excellent selectivity toward ring-opening products during tetralin hydrocracking. Mo-modified HY zeolite (MoHY) samples were initially prepared using both solid-state ion exchange (SSIE) (designated as MoHY-S) and the conventional impregnation method (designated as MoHY-I). Raman and x-ray photoelectron spectroscopy (XPS) results revealed a lower dispersion of Mo oxides on the zeolite surface of MoHY-S compared to MoHY-I. After extrusion with an Al2O3 binder and subsequent sulfidation, a greater number of (Ni)MoS2 nanoslabs, acting as active sites for hydrogenation reactions, were observed on the zeolite surface of the NiMo/(Al2O3+MoHY-S) catalyst compared to those of the NiMo/(Al2O3+MoHY-I) and reference NiMo/(Al2O3+HY) catalysts. Further evaluation of tetralin hydrocracking performance revealed that the NiMo/(Al2O3+MoHY-S) catalyst exhibited the highest activity and ring-opening selectivity, accompanied by the lowest level of secondary cracking among the three catalysts. This superior performance is attributed to the enhanced dispersion of metal sites in close proximity to the acid sites of HY zeolite. Notably, strengthening the proximity between acid and metal sites can effectively promote the synergy between the hydrogenation and cracking sites.
More Related Videos
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
10:19Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
Related Concept Videos
Catalysis
Heterogeneous Catalysis
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Preparation and Reactions of Sulfides
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.