Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

From 3D to 2D zeolite catalytic materials

“…Metal oxides, sulphides and phosphides have also been supported over hierarchical zeolites in order to expand their catalytic applications in reactions such as aromatization, alkylation, desulphurization and hydrodeoxygenation. [173][174][175][176] Thus, ZnO-containing MFI zeolite catalysts with bimodal and trimodal hierarchical pore structures have been studied for the conversion of methanol to aromatics. The presence of highly dispersed ZnO clusters enhanced the selectivity for aromatics.…”

“…174 On the other hand, mesoporous ZSM-5 modified with metal sulfides (NiMoS/ZSM-5 and CoMoS/ZSM-5) was active in deep hydrogenation of phenanthrene. 175 Ni 2 P has been supported over hierarchical ZSM-5 zeolites, showing an enhanced activity in hydrodeoxygenation reactions of bio-oil model compounds. 176 In addition to metals, metal oxides and salts, hierarchical zeolites have been used as supports for other catalysts: encapsulation of Fe-Schiff bases and Ti-salen complexes, incorporation of heteropolyacids and enzymes, and functionalization by grafting of sulfonic groups.…”

Organic template-free synthesis of zeolite Y nanoparticle assemblies and their application in the catalysis of the Ritter reaction

“…For reference, a conventional zeolite Y sample (Y) and mesoporous zeolite ZSM-5 (ZSM-5-M) were synthesized according to a literature procedure. 24,25 The H-form of the samples was obtained via ion exchange with 1 M NH 4 NO 3 solution at 80 C for 4 h, followed by calcination at 500 C in air for 4 h under a N 2 stream; this process was repeated twice. The obtained samples were designated as HY-NA, HY and HZSM-5-M.…”

Ni2P clusters on zeolite nanosheet assemblies with high activity and good stability in the hydrodesulfurization of 4,6-dimethyldibenzothiophene

“…The microporous MOR zeolite was synthesized by the same procedure in the absence of RCC. For comparison, the mesoporous zeolite ZSM-5 (M-ZSM-5) was also synthesized according to our previously reported procedure [40]. The H-forms of these samples were ion-exchanged with a 1 M NH 4 NO 3 solution at 80°C for 4 h, followed by drying at 100°C overnight and calcination at 500°C for 3 h. The samples obtained after ion exchange were denoted as NS-HMOR, HMOR, and M-HZSM-5.…”

“…This paper presents continuing research on the preparation of highly active HDS catalysts supported on zeolites [38][39][40]. Specifically, a facile method for synthesizing mordenite nanosheet assemblies (NS-NaMOR) with large external surface area and micro-mesoporous structure is reported.…”